Component mounting device and state determination method

Abstract

To provide a component mounting device capable of suppressing deterioration in inspection accuracy of a failure of a tape feeder independent of the number of components installed in the tape feeder.SOLUTION: A component mounting device that feeds a carrier tape in which a component is housed in a feed direction by a tape feeder, and in which a component fed to a component fetching out position is held and mounted to a substrate, comprises: a sprocket that feeds the carrier tape in a feeding direction; a component transfer motor that rotates and drives the sprocket; a first storage part that stores a slide failure determination value of the component transfer motor corresponding to a residual number of components remained in the carrier tape; a second storage part that stores the residual number of components remained in the carrier tape when rotating and driving the sprocket by the component transfer motor; a measurement part that measures a first current value of the component transfer motor when rotating and driving the sprocket by the component transfer motor; and a determination part determining that the component transfer motor is in a slide failure in the case where the first current value measured by the measurement part is larger than the slide failure determination value stored in the first storage part corresponding to the component residual number stored in the second storage part.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a component mounting apparatus and a state determination method. [Background technology]

[0002] Conventionally, a component supplying device (tape feeder) is known that transports a carrier tape containing components to a component removal position and supplies the components to a component mounting device. This component supplying device includes a sprocket that pitch-feeds the carrier tape, a drive motor that rotates the sprocket, and a monitoring unit (rotary encoder) that monitors the operation of the drive motor. The component supplying device monitors the operation of the drive motor, analyzes the load on the drive motor based on the monitored operation of the drive motor, determines whether the analyzed load on the drive motor is increasing or decreasing, and if the load on the drive motor is increasing or decreasing, notifies the user that a malfunction is predicted (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-224770 Summary of the Invention [Problem to be solved by the invention]

[0004] In the tape feeder of Patent Document 1, the motor current value supplied to the drive motor increases or decreases depending on the magnitude of the load. The tape feeder detects a fault when it detects that the motor current exceeds a predetermined current. Here, the greater the number of components installed in the tape feeder, the greater the load, and therefore the greater the motor current value. However, the predetermined current compared to the motor current is a constant value. Therefore, for example, if the predetermined current value is set when a large number of components are installed in the tape feeder, faults are difficult to detect when a small number of components or no components are installed in the tape feeder, and fault detection accuracy decreases. Similarly, for example, if the predetermined current value is set when a small number or no components are installed in the tape feeder, faults are easy to detect when a large number of components are installed in the tape feeder, and fault detection accuracy decreases.

[0005] The present disclosure has been made in consideration of the above circumstances, and provides a component mounting device and a state determination method that can suppress a decrease in the accuracy of detecting tape feeder failures, regardless of the number of components installed in the tape feeder. [Means for solving the problem]

[0006] One aspect of the present disclosure is a component mounting device that feeds a carrier tape containing components in a feed direction using a tape feeder, holds the components fed to a component removal position, and mounts the components on a board, the component mounting device including: a sprocket that feeds the carrier tape in the feed direction; a component transport motor that rotates and drives the sprocket; a first memory unit that stores a sliding defect judgment value of the component transport motor corresponding to the number of remaining components remaining on the carrier tape; a second memory unit that stores the number of remaining components remaining on the carrier tape when the component transport motor rotates and drives the sprocket; a measurement unit that measures a first current value of the component transport motor when the component transport motor rotates and drives the sprocket; and a judgment unit that judges that the component transport motor has a sliding defect if the first current value measured by the measurement unit is greater than the sliding defect judgment value stored in the first memory unit that corresponds to the number of remaining components stored in the second memory unit. a third storage unit that stores a predetermined threshold value for reduction in the number of remaining components; and a fourth storage unit that stores a reel lift-up determination value for determining whether a reel of the tape feeder has been lifted up; Equipped with the determination unit determines that the reel is lifted when the remaining number of components stored in the second storage unit is smaller than the remaining number of components reduction threshold value stored in the third storage unit, and when the first current value measured by the measurement unit is larger than the reel lifted determination value stored in the fourth storage unit. It is a component mounting device.

[0007] One aspect of the present disclosure is a state determination method for determining the state of a tape feeder that feeds a carrier tape containing components, the method comprising the steps of: measuring a current value of a component conveyance motor when the component conveyance motor rotates a sprocket that feeds the carrier tape in a feed direction; and determining that the sprocket or the component conveyance motor is experiencing a sliding failure if the measured current value is greater than a sliding failure determination value of the component conveyance motor that corresponds to the number of components remaining on the carrier tape when the component conveyance motor rotates the sprocket. determining that the reel is lifted when the remaining number of components is smaller than a predetermined remaining number reduction threshold and when the measured current value is larger than a reel lift determination value for determining whether the reel of the tape feeder is lifted; This is a state determination method having the following. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to suppress a decrease in the accuracy of fault detection, regardless of the number of components installed in the tape feeder. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a plan view of a component mounting apparatus according to a first embodiment of the present disclosure; [Figure 2]Partial cross-sectional view of component mounting equipment [Figure 3A] Tape feeder configuration diagram [Figure 3B] Carrier tape structure diagram [Figure 3C] Enlarged view of the tape feeder's component removal position [Figure 4] Schematic structural diagram of the tape feeder's tape feeding mechanism [Figure 5] Block diagram showing the configuration of the control system of the component mounting device [Figure 6] Block diagram showing the configuration of the tape feeder control system [Figure 7] FIG. 10 is a diagram showing an example of the relationship between the number of remaining parts in a tape feeder and the maximum motor current value. [Figure 8] FIG. 10 is a diagram showing a current waveform of a motor current and an operation command of a drive motor in a comparative example. [Figure 9] Diagram to explain tape feed abnormality in the tape feeder [Figure 10A] FIG. 10 is a diagram showing a first example of the relationship between the maximum motor current value and the number of remaining parts. [Figure 10B] FIG. 2 shows a second example of the relationship between the maximum motor current value and the number of remaining parts. [Figure 11] 10 is a flowchart showing an example of an operation performed by a component mounting device when determining a sliding defect judgment value. [Figure 12] 10 is a flowchart showing an example of operation when determining a state by a component mounting device. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present disclosure will be described in detail with appropriate reference to the drawings. However, more detailed description than necessary may be omitted. For example, detailed descriptions of well-known matters and redundant descriptions of substantially identical configurations may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art. Note that the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0011] For example, the term "unit" or "device" in the embodiments is not limited to a physical configuration mechanically realized by hardware, but also includes a configuration whose functions are realized by software such as a program. Furthermore, the functions of one configuration may be realized by two or more physical configurations, or the functions of two or more configurations may be realized by, for example, one physical configuration.

[0012] (First embodiment) <Component Mounting Equipment Configuration> Fig. 1 is a plan view of a component mounting apparatus 100 according to a first embodiment of the present disclosure. Fig. 2 is a partial cross-sectional view of the component mounting apparatus 100. Fig. 2 shows a cross section of the component mounting apparatus 100 taken along line AA in Fig. 1.

[0013] In Fig. 1 and in some parts described later, the X direction (left-right direction in Fig. 1) in the board transport direction and the Y direction (up-down direction in Fig. 1) perpendicular to the board transport direction are shown as two axial directions that are perpendicular to each other in a horizontal plane. In Fig. 2 and in some parts described later, the Z direction is shown as a height direction that is perpendicular to the horizontal plane. The Z direction is the vertical direction or the perpendicular direction when the component mounting apparatus 100 is installed on a horizontal plane.

[0014] The component mounting apparatus 100 has a function of performing a component mounting operation in which components P (see FIG. 3B, etc.) supplied from a component supply unit 7 are mounted on a board 6. The component mounting apparatus 100 has a function of manufacturing a mounted board by mounting components P on a board 6. A board transport mechanism 5 is disposed in the X direction at the center of the base 4. The board transport mechanism 5 transports the board 6 transported from the upstream side to the mounting operation position, positions it, and holds it. In addition, the board transport mechanism 5 transports the board 6, for which the component mounting operation has been completed, downstream from the mounting operation position.

[0015] Component supply units 7 are arranged on both sides of the board transport mechanism 5. A plurality of tape feeders 8 are attached in parallel to each component supply unit 7. The tape feeders 8 feed carrier tape 16, on which pockets 16b (see FIG. 3B, etc.) for storing components P are formed, at a pitch rate in a direction (tape feed direction) from the outside of the component supply unit 7 toward the board transport mechanism 5, thereby supplying components P to a component pick-up position S (see FIG. 3C) where a mounting head 11 of a component mounting mechanism, which will be described below, is to pick up the components.

[0016] A Y-axis beam 9 equipped with a linear drive mechanism is disposed at one end in the X direction on the upper surface of the base 4. Two X-axis beams 10, similarly equipped with linear drive mechanisms, are connected to the Y-axis beam 9 so as to be freely movable in the Y direction. A mounting head 11 is attached to each of the two X-axis beams 10 so as to be freely movable in the X direction. As shown in FIG. 2, the mounting head 11 is equipped with a plurality of suction units 11a that can lift up and down while suctioning and holding components P. A suction nozzle 11b that suctions and holds components P is attached to the lower end of each of the suction units 11a.

[0017] 1, by driving the Y-axis beam 9 and the X-axis beam 10, the mounting head 11 moves in the X direction and the Y direction, respectively. As a result, the two mounting heads 11 pick up and remove components P from component removal positions S of the tape feeders 8 arranged in the corresponding component supply units 7 using the suction nozzles 11b, and mount the components at mounting points on the board 6 positioned by the board transport mechanism 5. The Y-axis beam 9, the X-axis beam 10, and the mounting heads 11 constitute a component mounting mechanism 12 that mounts components on the board 6 by moving the mounting heads 11 holding the components.

[0018] A component recognition camera 13 is disposed between the component supply unit 7 and the board transport mechanism 5. When the mounting head 11, which has taken out a component P from the component supply unit 7, moves above the component recognition camera 13, the component recognition camera 13 captures an image of the component P held by the mounting head 11 and recognizes the holding posture of the component. The board recognition camera 14 is attached to the plate 10a on which the mounting head 11 is attached, and moves integrally with the mounting head 11.

[0019] As the mounting head 11 moves, the board recognition camera 14 moves above the board 6 positioned by the board transport mechanism 5, and captures an image of a board mark (not shown) provided on the board 6 to recognize the position of the board 6. The board recognition camera 14 also moves above the suction position of the components P on the tape feeder 8, and recognizes the state of the carrier tape 16 near the component removal position. When the mounting head 11 mounts components on the board 6, the mounting position is corrected taking into account the component recognition results by the component recognition camera 13 and the board position recognition results by the board recognition camera 14.

[0020] As shown in Fig. 2, the component supply unit 7 is composed of a carriage 15 that has a plurality of tape feeders 8 pre-installed on a feeder base 15a and is detachable from the base 4. The carriage 15 holds a supply reel 17 that stores a wound carrier tape 16 holding components P. The carrier tape 16 pulled out from the supply reel 17 is attached to the tape feeder 8. The tape feeder 8 pitch-feeds the carrier tape 16 to a component pick-up position S by the suction nozzle 11b.

[0021] Next, the configuration and function of tape feeder 8 will be described with reference to Figures 3A, 3B, 3C, and 4. Figure 3A is an explanatory diagram of the configuration of tape feeder 8. Figure 3B is an explanatory diagram of the structure of carrier tape 16. Figure 3C is an enlarged view of the vicinity of the component removal position of tape feeder 8. Figure 4 is an explanatory diagram of the schematic structure of the tape feeding mechanism of tape feeder 8.

[0022] Tape feeder 8 has the function of transporting carrier tape 16 that stores components P and is covered with cover tape 16d, peeling off cover tape 16d just before component pick-up position S (see FIG. 3C), and supplying the stored components P to component pick-up position S. As shown in FIG. 3A, tape feeder 8 is configured with a main body 8a and a mounting portion 8b that protrudes downward from the underside of main body 8a. Tape feeder 8 is mounted to feeder base 15a by mounting mounting portion 8b to feeder base 15a with the underside of main body 8a aligned with feeder base 15a.

[0023] Furthermore, by attaching the tape feeder 8 to the feeder base 15a, a feeder control unit 21 built into the tape feeder 8 is electrically connected to a mounting control unit 22 of the component mounting apparatus 100. The feeder control unit 21 controls a feeding operation (also referred to as a tape feeding operation or a component feeding operation) for feeding the carrier tape 16. A tape transport path 8c is provided inside the main body 8a to guide the carrier tape 16 pulled out from the supply reel 17 and inserted into the main body 8a. The tape transport path 8c is provided to communicate from an insertion opening 8d to an ejection opening 8e. The insertion opening 8d is an opening through which the carrier tape 16 is inserted at the end of the main body 8a on the upstream side in the tape feeding direction (hereinafter simply referred to as the "upstream side," and the opposite direction is referred to as the "downstream side"). The ejection opening 8e is an opening provided downstream of a component removal position S where components are sucked and removed by the mounting head 11.

[0024] 3B and 3C, the carrier tape 16 includes a base tape 16a constituting the tape body and a cover tape 16d. The base tape 16a is provided with pockets 16b for storing and holding components P and feed holes 16c for pitch-feeding the carrier tape 16 at a predetermined pitch. The pockets 16b are provided at a pitch interval Lp in the tape feed direction. The cover tape 16d is attached to the upper surface of the base tape 16a so as to cover the pockets 16b to prevent the components P from falling out of the pockets 16b.

[0025] As shown in Fig. 3A, the main body 8a is provided with a tape feed mechanism 23 for pitch-feeding the carrier tape 16. The tape feed mechanism 23 includes a sprocket 24 disposed horizontally at the downstream end of the main body 8a with its axis perpendicular to the tape feed direction, and a drive motor 25 for rotating the sprocket 24. The sprocket 24 has a plurality of feed pins 24a (see Fig. 4) formed on its outer periphery.

[0026] The drive motor 25 rotates in both directions by a drive current Id (motor current) supplied by a motor drive unit 63 (see FIG. 6). The drive current Id supplied by the motor drive unit 63 is controlled by the feeder control unit 21. The current value of the drive current Id is measured by a current measurement unit 64 (see FIG. 6) provided in the motor drive unit 63. The drive motor 25 rotates the sprocket 24 with the feed pins 24a engaged with the feed holes 16c of the carrier tape 16, thereby pitch-feeding the carrier tape 16 along the tape transport path 8c.

[0027] 3A, 3C, and 4, a tape pressing cover 26 is disposed on the top surface of the main body 8a near the sprocket 24. A feed pin 24a of the sprocket 24 is partially exposed through the tape pressing cover 26. The tape pressing cover 26 is provided with a cover tape peeling section 27 for peeling off the cover tape 16d. An opening 28 is also provided downstream of the cover tape peeling section 27 of the tape pressing cover 26, corresponding to the component pick-up position S by the suction nozzle 11b.

[0028] As shown in Figure 3A, carrier tape 16 is pitch-fed while being pressed against tape feed path 8c by tape presser cover 26. As carrier tape 16 travels below tape presser cover 26, cover tape 16d is folded back at cover tape peeling section 27 and pulled out upstream, causing cover tape 16d to be peeled off from base tape 16a upstream of component removal position S. This exposes component P in pocket 16b upward at opening 28, making it available for removal by suction nozzle 11b. Cover tape feed mechanism 29 guides peeled cover tape 16d in the opposite direction to the tape feed direction and feeds it into tape recovery section 30, which is provided upstream of main body 8a.

[0029] As shown in FIG. 4 , the sprocket 24 is provided with a rotary encoder E that detects the rotational position R of the sprocket 24. The rotational position R detected by the rotary encoder E is transmitted to the feeder control unit 21. For example, the sprocket 24 feeds the carrier tape 16 in the forward direction (tape feed direction) (direction of arrow c) by rotating clockwise, and feeds the carrier tape 16 in the reverse direction (opposite to the tape feed direction) (direction of arrow b) by rotating counterclockwise. The sprocket 24 has, for example, 72 feed pins 24 a per revolution of the sprocket 24 (one revolution of the sprocket), but this is not limited to this. The sprocket 24 rotates by driving force from the drive motor 25 and pitch-feeds the carrier tape 16. The pitch feed corresponds to feeding the carrier tape 16 by a pitch interval Lp, which corresponds to feeding one feed pin 24 a of the sprocket 24, i.e., feeding from a given feed pin 24 a to an adjacent feed pin 24 a. Therefore, pitch feeding corresponds to feeding one part P.

[0030] Next, the sliding failure of the sprocket 24 and the drive motor 25 will be described.

[0031] The ease of sliding of the sprocket 24 during rotation may be the same or different at each rotational position. For example, using the sprocket 24 over a long period of time may gradually wear the sprocket 24, making it harder and less likely to slide. Because the degree of wear may vary at different parts of one revolution of the sprocket, the ease of sliding may be uneven across one revolution of the sprocket and may or may not be periodic. Therefore, the drive current Id supplied to the drive motor 25 for rotating the sprocket 24 changes depending on the state of the sprocket 24. For example, the current value of the drive current Id may increase. Therefore, the torque (also referred to as motor torque) of the drive motor 25 obtained in response to the drive current Id may also increase.

[0032] The same thing can be said about the sliding state of the sprocket 24 for the drive motor 25. For example, using the drive motor 25 over a long period of time can gradually wear down the drive motor 25 (e.g., the motor body, gears, or brushes), hardening it and making it difficult to slide. Therefore, depending on the state of the drive motor 25, the drive current Id supplied to the drive motor 25 can change, and the current value of the drive current Id can increase. Therefore, the motor torque obtained according to the drive current Id can also increase.

[0033] The motor current of the drive motor 25 may also vary depending on the number of components carried by the carrier tape 16. When the remaining number of components P held on the carrier tape 16 (remaining component count) is large, the components are heavier than when the remaining component count is small, so the motor current for carrying the same distance (for feeding at the same pitch) tends to be larger. The motor current may also vary depending on the type of components P stored in the tape feeder 8. For example, large or heavy components tend to have a larger motor current than small or light components.

[0034] The feeder control unit 21 determines whether there is a sliding defect in the sprocket 24 or the drive motor 25 by analyzing the motor current. Alternatively, the feeder control unit 21 may determine a sliding defect by analyzing the torque value of the motor torque instead of the motor current. Alternatively, the feeder control unit 21 may determine a sliding defect based on the position deviation (motor position deviation) of the drive motor 25. Here, a command for the drive motor 25 is continuously issued periodically (for example, every 1 millisecond). The difference between the theoretical rotational position (target rotational position) of the drive motor 25 corresponding to the command value and the actual rotational position of the drive motor 25 relative to this command value is the motor position deviation.

[0035] Note that the motor current and the motor torque are proportional to each other, so the sliding defect determination using the motor current and the sliding defect determination using the motor torque are essentially the same.

[0036] Next, the control system of the component mounting apparatus 100 and the tape feeder 8 will be described. Fig. 5 is a block diagram showing the configuration of a control system of component mounting apparatus 100. Fig. 6 is a block diagram showing the configuration of a control system of tape feeder 8. One or more tape feeders 8 are attached to component supply unit 7.

[0037] The component mounting apparatus 100 includes a mounting control unit 22 and a mounting storage unit 41. The mounting control unit 22 is configured with, for example, a processor, and realizes various functions by executing programs stored in the mounting storage unit 41. The processor may include an MPU (Micro Processing Unit), a CPU (Central Processing Unit), a DSP (Digital Signal Processor), etc. The mounting control unit 22 comprehensively controls each unit of the component mounting apparatus 100 and performs various processes. The mounting control unit 22 controls, for example, each unit of the board conveying mechanism 5, the component supply unit 7, the component mounting mechanism 12, the component recognition camera 13, the board recognition camera 14, and the display unit 42, to perform a component mounting operation in which components P supplied from the component supply unit 7 are mounted on the board 6 held by the board conveying mechanism 5.

[0038] The on-board storage unit 41 includes a primary storage device (e.g., RAM (Random Access Memory) or ROM (Read Only Memory)). The on-board storage unit 41 may include a secondary storage device (e.g., HDD (Hard Disk Drive) or SSD (Solid State Drive)) or a tertiary storage device (e.g., optical disk, SD card). The on-board storage unit 41 may include other storage devices. The on-board storage unit 41 stores various data, information, programs, etc.

[0039] A plurality of tape feeders 8 are connected to the component supply unit 7, and signals and data are exchanged via a communication unit 65 (see FIG. 6) provided in each tape feeder 8. The display unit 42 is a display device such as a liquid crystal panel, and displays various data, information, etc. The communication unit 43 is a communication interface, and exchanges signals and data with an external device (for example, a management computer or another component mounting device) via a communication network. The communication unit 43 may also communicate with each tape feeder 8.

[0040] As shown in FIG. 6, the tape feeder 8 includes a feeder control unit 21, a feeder memory unit 66, a motor drive unit 63, a current measurement unit 64, a rotary encoder E, a drive motor 25, an operation and display panel 31, and a communication unit 65.

[0041] The current measurement unit 64 measures the current value (motor current value) of the drive current Id supplied by the motor drive unit 63. The current measurement unit 64 may measure the motor current value for each pitch feed, that is, the motor current value during the pitch feed period.

[0042] The feeder control unit 21 is configured by, for example, a processor, and realizes various functions by executing programs stored in the feeder storage unit 66. The processor may include an MPU, a CPU, a DSP, etc. The feeder control unit 21 comprehensively controls each unit of the tape feeder 8 and performs various processes. The feeder control unit 21 controls, for example, the motor drive unit 63, the operation / display panel 31, and the communication unit 65. The feeder control unit 21 also has a judgment value determination unit 61 and a state judgment unit 62.

[0043] The judgment value determiner 61 determines the sliding defect judgment value th1 before actual production by the component mounter 1 (before the component mounting operation) and stores it in the feeder storage unit 66. The sliding defect judgment value th1 is a threshold value for determining whether the sprocket 24 or the drive motor 25 is experiencing a sliding defect. The sliding defect judgment value th1 has a value corresponding to the number of remaining components. The judgment value determiner 61 may determine the sliding defect judgment value th1 so that, for example, the sliding defect judgment value th1 increases as the number of remaining components increases and decreases as the number of remaining components decreases. In this case, the current measuring unit 64 may measure the motor current value (e.g., the maximum motor current value) for each remaining component number before actual production by the component mounter 1 (before the component mounting operation), and the judgment value determiner 61 may determine the sliding defect judgment value th1 for each remaining component number (corresponding to the remaining component number) based on the motor current value for each remaining component number.

[0044] The state determination unit 62 performs a sliding defect determination based on the number of remaining components, the motor current value, and the sliding defect determination value th1. The sliding defect determination is a determination of whether the sprocket 24 or the drive motor 25 is experiencing a sliding defect. For example, the state determination unit 62 determines that the sprocket 24 or the drive motor 25 is experiencing a sliding defect if the motor current value (e.g., the maximum motor current value) measured by the current measurement unit 64 at a predetermined timing (time t1) during actual production (component mounting operation) by the component mounting device 1 is greater than the sliding defect determination value th1 corresponding to the number of remaining components at this timing (time t1). On the other hand, the state determination unit 62 determines that the sprocket 24 or the drive motor 25 is experiencing a normal sliding condition if the motor current value measured by the current measurement unit 64 at time t1 during actual production by the component mounting device 1 is equal to or less than the sliding defect determination value th1 corresponding to the number of remaining components at this time t1.

[0045] The state determination unit 62 performs a reel lift determination based on the number of remaining components and the motor current value. The reel lift determination is a determination of whether the supply reel 17 is lifted from its predetermined position on the tape feeder 8. For example, if the number of remaining components at a predetermined timing (time t2) during actual production (component mounting operation) by the component mounting apparatus 1 is less than the remaining component count reduction threshold th2 and the motor current value (e.g., the maximum motor current value) measured by the current measurement unit 64 at this timing (time t2) is greater than the reel lift determination value th3, the state determination unit 62 determines that the supply reel 17 is in a lifted state (reel lifted state). On the other hand, if the number of remaining components at time t2 during actual production by the component mounting apparatus 1 is equal to or greater than the remaining component count reduction threshold th2 or if the motor current value measured by the current measurement unit 64 at this time t2 is equal to or less than the reel lift determination value th3, the state determination unit 62 determines that the reel is not in a lifted state.

[0046] The feeder storage unit 66 includes a primary storage device (e.g., RAM or ROM). The feeder storage unit 66 may include a secondary storage device (e.g., HDD or SSD) or a tertiary storage device (e.g., optical disk, SD card). The feeder storage unit 66 may include other storage devices. The feeder storage unit 66 stores various data, information, programs, etc.

[0047] The feeder storage unit 66 stores, for example, motor current data 66a, remaining component number data 66b, and threshold value data 66c. The motor current data 66a may be the current waveform or current value (e.g., maximum current value, minimum current value, average current value, or other current value) of the motor current for each pitch feed in one rotation of the sprocket.

[0048] The judgment value determiner 61 and the state determiner 62 store the current value (motor current value) of the drive current Id supplied to the drive motor 25 by the motor drive unit 63, measured by the current measuring unit 64, as motor current data 66a in the feeder storage unit 66. For example, the judgment value determiner 61 and the state determiner 62 may store the current value itself (current waveform) of the drive current Id for each pitch feed as the motor current data 66a. Alternatively, the judgment value determiner 61 and the state determiner 62 may calculate the maximum current value (maximum motor current value) of the drive current Id for each pitch feed based on the current value of the drive current Id for each pitch feed, and store this maximum motor current value in the feeder storage unit 66 as motor current data 66a.

[0049] The remaining component number data 66b is data indicating the number of remaining components. The feeder control unit 21 monitors the remaining component number, and updates the remaining component number (remaining component number data 66b) whenever the supply reel 17 or carrier tape 16 is replaced, or whenever a component P is removed from the carrier tape 16 by the mounting head 11 or the like.

[0050] The threshold data 66c is data to be compared with the motor current data 66a or the number of remaining components. The threshold data 66c includes, for example, the sliding defect judgment value th1, the remaining component count reduction threshold th2, and the reel lift judgment value th3 described above. The remaining component count reduction threshold th2 may be, for example, approximately 1,000 components. The reel lift judgment value th3 may be, for example, approximately 1 A. The sliding defect judgment value th1 may be stored in advance in the feeder storage unit 66, or may be determined by calculation or the like by the judgment value determination unit 61 and stored in the feeder storage unit 66. The remaining component count reduction threshold th2 and the reel lift judgment value th3 may be predetermined and stored in the feeder storage unit 66, and may be fixed values ​​or variable values. For example, the remaining component count reduction threshold th2 and the reel lift judgment value th3 may be the same or different depending on the type of the supply reel 17 or the carrier tape 16, etc.

[0051] If the state determination unit 62 determines that the sprocket 24 or the drive motor 25 is malfunctioning, it may cause the operation and display panel 31 to display information indicating the malfunction. If the state determination unit 62 determines that the sprocket 24 or the drive motor 25 is not malfunctioning, it may cause the operation and display panel 31 to display information indicating that the malfunction is normal. If the state determination unit 62 determines that the reel is in a lifted state, it may cause the operation and display panel 31 to display information indicating that the reel is in a lifted state. If the state determination unit 62 determines that the reel is not in a lifted state, it may cause the operation and display panel 31 to display information indicating that the reel is not in a lifted state. Furthermore, even if the state determination unit 62 determines that the sliding is normal or that the reel is not in a lifted state, if another cause of a malfunction of the tape feeder 8 is detected, it may cause the operation and display panel 31 to display information indicating that another malfunction has occurred.

[0052] The communication unit 65 is a communication interface, and transmits and receives signals and data to and from the communication unit 43 of the component mounting apparatus 100, for example.

[0053] The judgment value determination unit 61 may determine the sliding failure judgment value th1 based on the motor torque value or the motor position deviation instead of the motor current value. The state determination unit 62 may perform the sliding failure judgment or the reel lift judgment, etc., based on the motor torque value or the motor position deviation instead of the motor current value.

[0054] <Sliding failure judgment using sliding failure judgment value corresponding to remaining number of parts> Next, a sliding defect judgment using the sliding defect judgment value th1 corresponding to the number of remaining parts will be described.

[0055] 7 is a diagram showing an example of the relationship between the number of remaining components in tape feeder 8 and the maximum motor current value of drive motor 25. As shown in Fig. 7, sliding defect judgment value th1 is determined so that the greater the number of remaining components, the greater the sliding defect judgment value th1, and the fewer the number of remaining components, the smaller the sliding defect judgment value th1. The sliding defect judgment value th1 corresponding to the number of remaining components is stored in feeder memory unit 66.

[0056] The state determination unit 62 determines whether the maximum motor current is greater than a sliding failure determination value th1 corresponding to the number of remaining parts at the time of current measurement. If the maximum motor current is greater than the sliding failure determination value th1, the state determination unit 62 determines that the sprocket 24 or the drive motor 25 is experiencing a sliding failure. Therefore, as shown in FIG. 7, the abnormality measurement value m1, which is a measurement value (maximum motor current value) indicating a sliding failure, is distributed within a range of values ​​greater than the sliding failure determination value th1. For example, if multiple measurement values ​​are obtained using the same sprocket 24 or drive motor 25 experiencing a sliding failure, the abnormality measurement value m1 may be larger as the number of remaining parts increases, and smaller as the number of remaining parts decreases, similar to the sliding failure determination value th1.

[0057] If the maximum motor current value is less than the sliding failure judgment value th1, the state judgment unit 62 judges that the sprocket 24 or the drive motor 25 is sliding normally. Therefore, as shown in Fig. 7, the normal measurement value m2, which is a measurement value (maximum motor current value) indicating normal sliding, is distributed within a range of values ​​smaller than the sliding failure judgment value th1. For example, if multiple measurement values ​​are obtained using the same sprocket 24 or drive motor 25 that is sliding normally, the normal measurement value m2 may be larger as the number of remaining parts increases, and smaller as the number of remaining parts decreases, similar to the sliding failure judgment value th1.

[0058] FIG. 7 shows a judgment value line L1 that connects the sliding defect judgment values ​​th1 for each remaining number of components. The judgment value line L1 may have an approximately curved or linear shape. An abnormal-time line L2 that connects the abnormal-time measurement values ​​measured for each remaining number of components is also shown. A normal-time line L3 that connects the normal-time measurement values ​​measured for each remaining number of components is also shown. In FIG. 7, the abnormal-time line L2 is a predetermined value larger than the judgment value line L1 at a position corresponding to each remaining number of components, and may be approximately parallel to the judgment value line L1. In FIG. 7, the normal-time line L3 is a predetermined value smaller than the judgment value line L1 at a position corresponding to each remaining number of components, and may be approximately parallel to the judgment value line L1.

[0059] 8 is a diagram showing the current waveform of the motor current and the operation command of the drive motor 25 in Comparative Example 1. In Comparative Example 1, it is assumed that the sliding defect determination value thx1 is constant regardless of the number of remaining parts.

[0060] In case 1, it is assumed that no sliding failure occurs in sprocket 24 or drive motor 25. In case 1, no parts are installed on tape feeder 8, the load due to part P is small, and the maximum motor current value is small. In this case, the maximum motor current value is smaller than sliding failure judgment value thx1, so it is determined that sliding is normal. Therefore, because it is determined that sliding is normal when no sliding failure occurs, the judgment result is correct.

[0061] In case 2, it is assumed that a sliding defect has occurred in the sprocket 24 or the drive motor 25. In case 2, no parts are installed on the tape feeder 8 and the load due to the part P is small, but a sliding defect has occurred in the sprocket 24 or the drive motor 25, causing the maximum motor current value to increase. In this case, the maximum motor current value is greater than the sliding defect judgment value thx1, so it is judged that a sliding defect has occurred. Therefore, if a sliding defect exists, it is judged that a sliding defect has occurred, and the judgment result is correct.

[0062] In case 3, it is assumed that no sliding failure occurs in the sprocket 24 or drive motor 25. In case 3, when a component is installed on the tape feeder 8, the load due to the component P is large, and therefore the maximum motor current value is large. In this case, the maximum motor current value is larger than the sliding failure judgment value thx1, and therefore it is judged that there is a sliding failure. Therefore, since it is judged that there is a sliding failure when there is no sliding failure, there is an erroneous judgment result.

[0063] In this way, if the sliding defect judgment value thx1 is constant regardless of the number of remaining components, an erroneous judgment result of the sliding defect may occur. In contrast, according to the component mounting apparatus 1 of this embodiment, the sliding defect judgment value th1, which indicates the judgment standard of the sliding defect, is made variable according to the number of remaining components, thereby making it possible to suppress erroneous judgment of the sliding defect. Therefore, the component mounting apparatus 1 can improve the feeding accuracy of the carrier tape 16 and improve the pickup rate of the components P.

[0064] <Reel lift detection> Next, the reel lift determination will be described.

[0065] When the number of components P remaining on carrier tape 16 becomes small, supply reel 17 may be lifted, causing a tape feed abnormality in tape feeder 8. Figure 9 is a diagram for explaining a tape feed abnormality in tape feeder 8.

[0066] 9, this is because the end 16E of the carrier tape 16(1) does not come off the temporary fastening slit 17d of the first supply reel 17(1). As a result, as component supply progresses, the first supply reel 17(1) floats up (arrow j) from the first reel holding portion 18A that holds the first supply reel 17(1) in a predetermined position, and becomes caught in the insertion opening 8d through which the carrier tape 16 is inserted.

[0067] 9 occurs, even if a control signal is sent to tape feeding mechanism 23 of tape feeder 8 to feed the carrier tape 16(1) at a pitch, the carrier tape 16(1) gets caught just before insertion port 8d and cannot be fed into tape feeder 8, resulting in a tape feeding error. Also, the vicinity of terminal end 16E of carrier tape 16 that has come off first supply reel 17(1) may become entangled with carrier tape 16 fed by an adjacent tape feeder 8 (not shown), hindering the pitch feeding of the entangled carrier tape 16, resulting in a tape feeding error in that tape feeder 8.

[0068] When a control signal is sent to the tape feed mechanism 23 of the tape feeder 8 to cause pitch feed, the drive motor 25 increases the motor current to cause pitch feed. Even in this case, if the rotation of the tape feed mechanism 23 (for example, the rotation of the sprocket 24) does not progress, the motor current is further increased, resulting in an overload state and an overload error. In this case, the operation of the tape feeder 8 or the main body of the component mounting apparatus 1 may stop. Even if the operator visually observes that the operation of the main body has stopped, it is difficult for the operator to understand why the overload error has occurred, and an inaccurate understanding of the error content may increase the operator's burden of checking. In addition, an overload error may be erroneously determined to be a malfunction of the tape feeder 8.

[0069] In FIG. 9, the second supply reel 17(2) is a supply reel following the first supply reel 17(1), is held by the second reel holding section 18B, and supplies the carrier tape 16(2).

[0070] In this embodiment, when the number of remaining components is low (when the number of remaining components is less than the remaining component count reduction threshold th2), the state determination unit 62 detects that the supply reel 17 has been lifted if the motor current value (e.g., maximum motor current value) exceeds a reel lift determination value th3. Normally, the fewer the number of remaining components, the smaller the motor current value. However, when a suddenly high motor current value is detected even when the number of remaining components is low, the state determination unit 62 detects that a reel lift has occurred.

[0071] When reel lifting is detected, the operation and display panel 31 may display reel lifting warning information indicating that the supply reel 17 has been lifted. The tape feeder 8 may transmit warning information to the component mounting device 1 via the communication units 43 and 65, and the display unit 42 of the component mounting device 1 may display the warning information. By displaying the reel lifting warning information on the operation and display panel 31 or the display unit 42, the operator can simply confirm the reel lifting state when the supply reel 17 is lifted, which may prevent the situation from progressing to an overload error. When the remaining amount of the carrier tape 16 falls below a predetermined amount without causing a tape feed abnormality, the supply reel 17 held by the first reel holding unit 18A is replaced, for example, manually by the operator or automatically (e.g., by splicing).

[0072] Fig. 10A is a diagram showing a first example of the relationship between the maximum motor current value of drive motor 25 and the number of remaining components in tape feeder 8. Fig. 10B is a diagram showing a second example of the relationship between the maximum motor current value of drive motor 25 and the number of remaining components in tape feeder 8.

[0073] 10A shows that the greater the number of remaining components, the greater the maximum motor current value, and the fewer the number of remaining components, the smaller the maximum motor current value. As the number of remaining components decreases, the weight of the carrier tape 16 holding the components P becomes lighter, and the maximum motor current value usually becomes smaller. Therefore, in this case, the state determination unit 62 determines that the reel lift-up has not occurred and that the system is normal.

[0074] 10B, as in FIG. 10A, the greater the number of remaining components, the greater the maximum motor current value, and the fewer the number of remaining components, the smaller the maximum motor current value. However, when the number of remaining components is small and is less than the remaining component count reduction threshold th2, the maximum motor current value suddenly increases to or exceeds the reel lift-up determination value th3. In this case, the state determination unit 62 determines that the weight of the carrier tape 16 holding the components P has become lighter, and that the maximum motor current value, which would normally be smaller, has increased, indicating that the reel is lifting up and that an abnormality has occurred.

[0075] <Operation of component mounting equipment> 11 is a flowchart showing an example of an operation when determining the sliding defect judgment value th1 by the component mounting apparatus 1. The sliding defect judgment value th1 is determined by the component mounting apparatus 1 before production.

[0076] First, feeder control unit 21 sets variable l for counting the number of remaining parts to L, so that l = L (S11). In this case, the actual number of remaining parts is automatically or manually set to L in accordance with variable n. Feeder control unit 21 controls sprocket 24 to perform a one-pitch feed operation (part feed) (S12). One feed operation is an operation of rotating sprocket 24 so as to feed feed pin 24a by one position. For example, in the part feed operation, sprocket 24 is rotated to a position where one feed operation has been performed from the reference position.

[0077] Feeder control unit 21 measures drive current Id of drive motor 25 when one feeding operation is performed using current measurement unit 64 in step S12. Based on this drive current Id, feeder control unit 21 measures (calculates) the maximum motor current value during this feeding operation (S13). Feeder control unit 21 associates the set remaining number of components with the measured maximum motor current value and stores them in feeder storage unit 66 (S14).

[0078] The feeder control unit 21 determines whether the variable 1 is "0" (S15). That is, the feeder control unit 21 determines whether the components P in the carrier tape 16 have been used up by the feeding operation of the sprocket 24, that is, whether all the components P have been fed.

[0079] If the variable l is not "0", that is, if components P remain in the carrier tape 16, the feeder control unit 21 decrements the variable l, subtracting the value 1 from the variable l (S16).

[0080] When variable l is "0," feeder control unit 21 determines sliding defect judgment value th1 according to the remaining number of components and stores it in feeder storage unit 66. For example, feeder control unit 21 may determine, for each remaining number of components stored in feeder storage unit 66, a value greater than the maximum motor current value associated with the remaining number of components as sliding defect judgment value th1. In this case, feeder control unit 21 may determine, for each remaining number of components, a value obtained by multiplying the maximum motor current value by a predetermined factor (for example, 1.3 to 1.5 times), as sliding defect judgment value th1.

[0081] Furthermore, the feeder control unit 21 may generate a judgment value line L1 (FIG. 9) that is a line connecting each of the sliding defect judgment values ​​th1 based on the sliding defect judgment value th1 for each remaining number of components. By generating the judgment value line L1, the component mounting device 1 can obtain the sliding defect judgment value th1 that changes minutely in accordance with the remaining number of components, even when the number of derived sliding defect judgment values ​​th1 corresponding to the remaining number of components is small.

[0082] Furthermore, the same value for the sliding defect judgment value th1 may be used within a predetermined range of the remaining component number. For example, the feeder control unit 21 may set the sliding defect judgment value A when the remaining component number is 10,000 or more, set the sliding defect judgment value B when the remaining component number is 3,000 or more but less than 10,000, set the sliding defect judgment value C when the remaining component number is 1,000 or more but less than 3,000, and set the sliding defect judgment value D when the remaining component number is less than 1,000. In this case, the judgment value line connecting the sliding defect judgment values ​​th1 is a line that changes in a staircase pattern. In this case, the component mounting device 1 can obtain the sliding defect judgment value th1 corresponding to each remaining component number even if a small number of sliding defect judgment values ​​th1 are derived depending on the range of the remaining component number.

[0083] According to the operation of Fig. 11, the component mounting apparatus 1 measures the maximum motor current value (corresponding to the number of remaining components) for each remaining component as a pre-processing step prior to actual production (before components are sent for component mounting). Then, based on the correlation between the number of remaining components and the maximum motor current value, the component mounting apparatus 1 can derive a sliding defect judgment value th1 corresponding to the remaining component number as a criterion for determining whether or not there is a sliding defect. Furthermore, by storing the sliding defect judgment value th1 in advance in the feeder storage unit 66, the component mounting apparatus 1 can quickly determine whether or not there is a sliding defect during actual production.

[0084] Fig. 12 is a flowchart showing an example of operation during state determination by the component mounting apparatus 1. In the state determination shown in Fig. 12, a sliding defect determination is performed using the determined sliding defect determination value th1, and a reel lift determination is also performed. Note that the tape feed mechanism 23 used in the operation of Fig. 11 and the tape feed mechanism 23 used in the operation of Fig. 12 may be the same mechanism. This allows the component mounting apparatus 1 to determine whether or not a sliding defect has been determined for the sprocket 24 and the drive motor 25 that behave in the same manner as when the sliding defect determination value th1 was determined.

[0085] First, feeder control unit 21 sets variable n for counting the number of remaining parts to N, so that n = N (S21). In this case, the actual number of remaining parts is automatically or manually set to N in accordance with variable n. Feeder control unit 21 controls sprocket 24 to perform a feed operation (part feed) of one pitch feed (S22).

[0086] The feeder control unit 21 measures the drive current Id of the drive motor 25 when one feeding operation is performed in step S22 using the current measurement unit 64. Based on this drive current Id, the feeder control unit 21 measures (calculates) the maximum motor current value during this feeding operation (S23).

[0087] The feeder control unit 21 determines whether the maximum motor current value is greater than a sliding defect judgment value th1 corresponding to the remaining number of components (S24). The sliding defect judgment value th1 is stored in the feeder storage unit 66 by the process of FIG. 11. If the maximum motor current value is greater than the sliding defect judgment value th1 corresponding to the remaining number of components (Yes in step S24), the feeder control unit 21 determines whether the variable n of the remaining number of components is less than a remaining number reduction threshold th2 (S25). If the variable n of the remaining number of components is less than the remaining number reduction threshold th2 (Yes in step S25), the feeder control unit 21 determines whether the maximum motor current value is greater than a reel lift judgment value th3 (S26). If the maximum motor current value is greater than the reel lift judgment value th3, the feeder control unit 21 determines that the supply reel 17 is lifted (reel lifted state) (S27). On the other hand, if the variable n of the remaining number of parts is equal to or greater than the remaining number of parts reduction threshold th2 (No in step S25), or if the maximum motor current value is equal to or less than the reel lift judgment value th3 (No in step S26), the feeder control unit 21 determines that the sprocket 24 or the drive motor 25 is in a state of poor sliding (S28).

[0088] In step S24, if the maximum motor current value is equal to or less than the sliding failure judgment value th1 corresponding to the number of remaining parts (No in step S24), the feeder control unit 21 judges that the sprocket 24 or the drive motor 25 is in a normal sliding state (S24A), and determines whether the variable n for the number of remaining parts is 0 (S29).

[0089] In step S29, if the variable n representing the remaining number of components is not 0 (No in S29), the feeder control unit 21 decrements the variable n, that is, subtracts the value 1 from the variable n (S30), and proceeds to step S22. That is, the feeder control unit 21 continues to determine whether there is a sliding problem and whether the reel is lifted for the next component feed.

[0090] On the other hand, in step S29, if the variable n of the remaining number of parts is 0 (Yes in S29), the feeder control unit 21 ends the processing of FIG.

[0091] According to the operation of FIG. 12, the component mounting apparatus 1 measures the maximum motor current value corresponding to the number of remaining components during actual production (when components are sent during component mounting). Then, by comparing this with a sliding defect judgment value th1 corresponding to the number of remaining components that has been derived in advance, the component mounting apparatus 1 can change the judgment criteria depending on the number of remaining components and determine whether or not there is a sliding defect. Furthermore, by using the sliding defect judgment value th1 determined in advance, the component mounting apparatus 1 can quickly determine whether or not there is a sliding defect during actual production. Furthermore, it is possible to reduce the amount of work required for measuring current during maintenance.

[0092] Furthermore, if the maximum motor current value suddenly increases when the number of remaining components is equal to or less than a predetermined number (remaining component number decrease threshold th2), the component mounting apparatus 1 can estimate that the supply reel 17 is lifted and determine that the reel is in a lifted state. Also, by quickly checking the determination result that the reel is in a lifted state, the operator can easily grasp that the reel is lifted, and can take measures to avoid overload caused by the reel being lifted, for example. Also, it can be determined that the cause of the overload error is not a malfunction of the tape feeder 8 but a poor condition of the supply reel 17.

[0093] 12, the processes of steps S25 and S26 may be omitted. That is, feeder control unit 21 may omit the determination of reel lift based on the number of remaining components (variable n for the number of remaining components) and the maximum motor current value. In this case, if the maximum motor current value is greater than sliding defect determination value th1 corresponding to the number of remaining components (Yes in step S24), it may determine that there is a sliding defect (step S28), and if the maximum motor current value is equal to or less than sliding defect determination value th1 corresponding to the number of remaining components (No in step S24), it may determine that there is normal sliding (step S24A).

[0094] 12, the processes of steps S24 and S24A may be omitted. That is, feeder control unit 21 may omit the sliding failure determination based on the number of remaining components (variable n of the number of remaining components) and the maximum motor current value. In this case, feeder control unit 21 may determine that the reel is in a lifted state (step S27) if variable n of the number of remaining components is less than remaining component count reduction threshold th2 (Yes in step S25) and the maximum motor current is greater than reel lift determination value th3 (Yes in step S26). On the other hand, feeder control unit 21 may simply determine that the reel is not in a lifted state if variable n of the number of remaining components is equal to or greater than remaining component count reduction threshold th2 (No in step S25) or if the maximum motor current is equal to or less than reel lift determination value th3 (No in step S26).

[0095] In this way, the component mounting apparatus 100 of this embodiment can determine the presence or absence of a sliding defect using the sliding defect determination value th1, which changes in value depending on the number of remaining components. Therefore, the component mounting apparatus 100 can suppress a decrease in the accuracy of fault detection, regardless of the number of components placed on the tape feeder. Therefore, the component mounting apparatus 100 can accurately determine the state of the tape feeder 8. Furthermore, the component mounting apparatus 100 can determine the reel lift state of the supply reel 17 based on the motor current value when the number of remaining components is low.

[0096] In the present embodiment, the sliding failure determination and the reel lift determination are performed using the current value of the drive current Id, but the present invention is not limited to this. For example, the state determination unit 62 may perform the sliding failure determination and the reel lift determination based on a torque value corresponding to the drive current Id, or may perform the sliding failure determination and the reel lift determination based on the position deviation of the sprocket 24.

[0097] In the present embodiment, the feeder control unit 21 mainly determines whether the reel is lifted based on the value of the motor current itself, but this is not limiting. For example, the feeder control unit 21 may determine whether the reel is lifted based on the time rate of change of the motor current (i.e., a sudden increase or decrease in the motor current value). For example, in step S26, the state determination unit 62 may determine that the reel is lifted when the rate of change of the maximum motor current is greater than a predetermined value.

[0098] In the present embodiment, the feeder control unit 21 performs the sliding defect judgment and the reel lifting judgment, and the feeder storage unit 66 stores data related to the sliding defect judgment and the reel lifting judgment, but this is not limiting. For example, the mounting control unit 22 of the component mounting apparatus 100 may perform the sliding defect judgment and the reel lifting judgment (for example, the processes shown in FIG. 12), and the mounting storage unit 41 may store data related to the sliding defect judgment and the reel lifting judgment (for example, the motor current data 66a and the threshold data 66c).

[0099] As described above, the component mounting apparatus 100 of the above embodiment feeds the carrier tape 16 storing components P in the feed direction using the tape feeder 8, holds the components P fed to the component removal position S, and mounts them on the board 6. The component mounting apparatus 100 includes a sprocket 24 that feeds the carrier tape 16 in the feed direction and a drive motor 25 (an example of a component conveyance motor) that rotates and drives the sprocket 24. The component mounting apparatus 100 includes a feeder memory unit 66 (an example of a first memory unit) that stores a sliding defect judgment value th1 for the drive motor 25 corresponding to the number of remaining components remaining on the carrier tape 16. The component mounting apparatus 100 also includes a feeder memory unit (an example of a second memory unit) that stores the number of remaining components remaining on the carrier tape 16 when the drive motor 25 rotates and drives the sprocket 24. The component mounting apparatus 100 also includes a current measurement unit 64 (an example of a measurement unit) that measures a first current value of the drive motor 25 when the drive motor 25 rotates and drives the sprocket 24. The component mounting device 100 is equipped with a state determination unit 62 (an example of a determination value) that determines that the sprocket 24 or the drive motor 25 is experiencing a sliding defect if the first current value measured by the current measurement unit 64 is greater than a sliding defect determination value th1 stored in the feeder memory unit 66 that corresponds to the remaining number of components stored in the feeder memory unit 66.

[0100] As a result, the component mounting apparatus 100 can determine the presence or absence of a sliding defect using the sliding defect determination value th1, which changes in value depending on the number of remaining components. Therefore, the component mounting apparatus 100 can suppress a decrease in the accuracy of fault detection, regardless of the number of components placed on the tape feeder. Therefore, the component mounting apparatus 100 can accurately determine the state of the tape feeder 8.

[0101] Furthermore, the component mounting apparatus 100 may include a judgment value determination unit 61 (an example of a determination unit) that determines a sliding defect judgment value th1. The current measurement unit 64 may measure a second current value of the drive motor 25 when the drive motor 25 drives and rotates the sprocket 24, depending on the number of remaining components. The judgment value determination unit 61 may determine a sliding defect judgment value th1 corresponding to the number of remaining components based on the measured second current value, and store the determined value in the feeder storage unit 66.

[0102] This allows the component mounting apparatus 100 to derive the sliding defect judgment value th1 before production and use it for sliding defect judgment during production.

[0103] The current measuring section 64 may measure the first current value while the carrier tape 16 is being transported by the driving motor 25.

[0104] As a result, the component mounting apparatus 100 can determine whether or not there is a sliding defect in the sprocket 24 or the drive motor 25 during production by measuring the motor current (first current value) during production using the component mounting apparatus 100. Therefore, the component mounting apparatus 100 can determine whether or not there is a sliding defect as part of the operation during production.

[0105] The component mounting apparatus 100 may also include a feeder storage unit 66 (an example of a third storage unit) that stores a predetermined remaining component count decrease threshold. The component mounting apparatus 100 may also include a feeder storage unit 66 (an example of a fourth storage unit) that stores a reel lift determination value th3 for determining whether the supply reel 17 (an example of a reel) of the tape feeder 8 has been lifted. The state determination unit 62 may determine that the supply reel 17 has been lifted if the remaining component count stored in the feeder storage unit 66 is smaller than the remaining component count decrease threshold th2 stored in the feeder storage unit 66 and if the first current value measured by the current measurement unit 64 is larger than the reel lift determination value th3 stored in the feeder storage unit 66.

[0106] As a result, the component mounting apparatus 100 can determine whether or not there is a poor sliding state, and whether or not there is a lifted reel state, based on the number of remaining components and the motor current value.

[0107] Although the embodiments have been described above with reference to the accompanying drawings, the present disclosure is not limited to such examples. It is clear that a person skilled in the art can conceive of various modifications, alterations, substitutions, additions, deletions, and equivalents within the scope of the claims, and it is understood that these also fall within the technical scope of the present disclosure. Furthermore, the components in the above-described embodiments may be combined in any manner without departing from the spirit of the invention. [Industrial Applicability]

[0108] The present disclosure is useful for a component mounting device and a state determination method that can suppress a decrease in the accuracy of detecting a tape feeder fault, regardless of the number of components installed in the tape feeder. [Explanation of symbols]

[0109] 6 PCB 7 Parts Supply Department 8 Tape Feeder 16 Carrier tape 21 Feeder control section 22 Mounting control section 24 sprockets 24a Feed pin 41 Implementation memory unit 61 Judgment value determination unit 62 Status determination unit 63 Motor drive unit 64 Current measurement section 65 Communications Department 66 Feeder memory unit 100 Component mounting equipment E rotary encoder P parts S Parts removal position

Claims

1. A component mounting device that feeds a carrier tape containing components in a feed direction by a tape feeder, holds the components fed to a component removal position, and mounts them on a board, a sprocket that feeds the carrier tape in the feed direction; a parts conveying motor that rotates and drives the sprocket; a first storage unit that stores a sliding failure determination value of the component conveying motor corresponding to the number of components remaining on the carrier tape; a second storage unit that stores the number of components remaining on the carrier tape when the component conveying motor rotates the sprocket; a measuring unit that measures a first current value of the component conveying motor when the component conveying motor rotates and drives the sprocket; a determination unit that determines that the sprocket or the component conveying motor has a sliding defect when the first current value measured by the measurement unit is greater than the sliding defect determination value stored in the first storage unit that corresponds to the remaining number of components stored in the second storage unit; and a third storage unit that stores a predetermined remaining part quantity reduction threshold; a fourth storage unit that stores a reel lift determination value for determining whether a reel of the tape feeder is lifted; Equipped with the determination unit determines that the reel is lifted when the remaining number of components stored in the second storage unit is smaller than the remaining number of components reduction threshold value stored in the third storage unit and when the first current value measured by the measurement unit is larger than the reel lift determination value stored in the fourth storage unit. Component mounting equipment.

2. A determination unit that determines the sliding failure determination value is further provided, the measuring unit measures a second current value of the component conveying motor when the component conveying motor rotates the sprocket, the second current value being in accordance with the number of remaining components; the determining unit determines the sliding defect determination value corresponding to the remaining number of components based on the measured second current value, and stores the determined sliding defect determination value in the first storage unit. The component mounting device according to claim 1 .

3. the measuring unit measures the first current value while the component conveying motor is conveying the carrier tape. The component mounting device according to claim 2 .

4. A state determination method for determining a state of a tape feeder that feeds a carrier tape containing components, comprising: measuring a current value of the component transport motor when the component transport motor rotates and drives a sprocket that feeds the carrier tape in a feed direction; determining that the sprocket or the component transport motor has a sliding defect when the measured current value is greater than a sliding defect determination value of the component transport motor corresponding to the number of components remaining on the carrier tape when the component transport motor rotates the sprocket; determining that the reel is lifted when the remaining number of components is smaller than a predetermined remaining number reduction threshold and when the measured current value is larger than a reel lift determination value for determining whether the reel of the tape feeder is lifted; A state determination method comprising:

Images