Tape Feeding Device and Tape Feeding Method

Abstract

To disclose a tape feeding device and a tape feeding method capable of suppressing position deviation of a sprocket when recovering a driving mode from a power saving mode.SOLUTION: A tape feeding device is applied to a tape feeder having:a sprocket, a motor, a position sensor, and a feeder control device, and comprises a storage part and a driving part. A control mode of the motor when performing a pitch feeding of a carrier tape is set as a driving mode. A control mode of reducing power to be supplied to the motor when the carrier tape is not required to be subjected to pitch feeding for a predetermined time as compared with the driving mode is set as a power saving mode. At the time, the storage part makes a storage device to store a rotational position of the motor just before transition from the driving mode to the power saving mode. The driving part rotates the motor to the rotational position of the motor stored in the storage device when recovering to the driving mode from the power saving mode.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] This specification discloses technologies related to a tape feeding device and a tape feeding method.

Background Art

[0002] The electronic component mounting device described in Patent Document 1 takes out electronic components from a tape feeder, transfers them to a substrate, and mounts them. The above tape feeder includes a tape feeding mechanism, a motor, an encoder, a feeder control unit, and an operation mode storage unit. The feeder control unit controls the operation mode of the motor based on an operation command and the output of the encoder. The operation mode storage unit stores an operation mode that defines the operation mode.

[0003] The above operation mode includes a normal mode that executes a normal tape feeding operation and position holding based on an operation command, and a power saving mode that stops power supply to the motor when a command signal for driving the motor from the electronic component mounting device has been continuously absent for a preset time. When the encoder detects that the rotational position of the sprocket has deviated from the specified position by more than a predetermined amount during the execution of the power saving mode, the above feeder control unit returns to the normal mode.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When the encoder detects that the rotational position of the sprocket has deviated from the specified position by more than a predetermined amount during the execution of the power-saving mode, the feeder control unit described in Patent Document 1 causes a return to the normal mode. However, according to the description in Patent Document 1, the deviation amount parameter including the above-mentioned predetermined amount needs to be appropriately changed according to the target product type. Therefore, there is a possibility that the deviation amount parameter is misconfigured. If the deviation amount parameter is misconfigured, the sprocket may be displaced beyond the allowable range, which may cause problems in the supply of parts.

[0006] In view of such circumstances, this specification discloses a tape feeding device and a tape feeding method capable of suppressing the displacement of the sprocket when returning from the power-saving mode to the driving mode.

Means for Solving the Problems

[0007] This specification discloses a tape feeder applied to a tape feeder including a sprocket, a motor, a position sensor, and a feeder control device, and a tape feeding device including a storage unit and a driving unit. The sprocket pitch-feeds a carrier tape that houses parts. The motor rotates the sprocket. The position sensor detects the rotational position of at least one of the sprocket and the motor. The feeder control device drives and controls the motor. The control mode of the motor when pitch-feeding the carrier tape is defined as the driving mode, and the control mode that reduces the supply power supplied to the motor when it is not necessary to pitch-feed the carrier tape for a predetermined time compared to the driving mode is defined as the power-saving mode. At this time, the storage unit stores the rotational position of the motor immediately before shifting from the driving mode to the power-saving mode in a storage device. The driving unit rotates the motor to the rotational position of the motor stored in the storage device when returning from the power-saving mode to the driving mode.

[0008] The present specification also discloses a tape feeding device including a memory unit and a driving unit, which is applied to a tape feeder including a sprocket, a motor, a position sensor, and a feeder control device. The sprocket pitch-feeds a carrier tape that houses components. The motor rotates the sprocket. The position sensor detects the rotational position of at least one of the sprocket and the motor. The feeder control device drives and controls the motor. A control mode of the motor when the carrier tape is pitch-fed is defined as a driving mode, and a control mode in which the supply power supplied to the motor when there is no need to pitch-feed the carrier tape for a predetermined time is reduced compared to the driving mode is defined as a power saving mode. At this time, the memory unit causes the storage device to store the rotational position of the motor immediately before shifting from the driving mode to the power saving mode. When receiving a feed instruction to pitch-feed the carrier tape in the power saving mode, the driving unit returns from the power saving mode to the driving mode and rotates the motor to a target position obtained by adding the rotation amount of the motor for pitch-feeding the carrier tape by the feed amount indicated by the feed instruction to the rotational position of the motor stored in the storage device.

[0009] Furthermore, this specification is applicable to a tape feeder including a sprocket, a motor, a position sensor, and a feeder control device, and discloses a tape feeding method including a storage step and a driving step. The sprocket pitch-feeds a carrier tape that houses components. The motor rotates the sprocket. The position sensor detects the rotational position of at least one of the sprocket and the motor. The feeder control device drives and controls the motor. A control mode of the motor when the carrier tape is pitch-fed is defined as a driving mode, and a control mode that reduces the supply power supplied to the motor when the carrier tape does not need to be pitch-fed for a predetermined time compared to the driving mode is defined as a power-saving mode. At this time, in the storage step, the storage device stores the rotational position of the motor immediately before shifting from the driving mode to the power-saving mode. In the driving step, when returning from the power-saving mode to the driving mode, the motor is rotated to the rotational position of the motor stored in the storage device.

[0010] In addition, this specification is applicable to a tape feeder including a sprocket, a motor, a position sensor, and a feeder control device, and discloses a tape feeding method including a storage step and a driving step. The sprocket pitch-feeds a carrier tape that houses components. The motor rotates the sprocket. The position sensor detects the rotational position of at least one of the sprocket and the motor. The feeder control device drives and controls the motor. When the control mode of the motor when pitch-feeding the carrier tape is a driving mode, and the control mode that reduces the supply power supplied to the motor when it is not necessary to pitch-feed the carrier tape for a predetermined time compared to the driving mode is a power-saving mode. At this time, in the storage step, the storage device stores the rotational position of the motor immediately before shifting from the driving mode to the power-saving mode. In the driving step, when receiving a feed instruction to pitch-feed the carrier tape in the power-saving mode, the motor returns from the power-saving mode to the driving mode and rotates the motor to a target position obtained by adding the rotation amount of the carrier tape to be pitch-fed according to the feed instruction to the rotational position of the motor stored in the storage device.

Advantages of the Invention

[0011] According to the above tape feeding device, the rotational position of the motor immediately before shifting from the driving mode to the power-saving mode is stored in the storage device, and when returning from the power-saving mode to the driving mode, the motor can be rotated to a predetermined rotational position using the rotational position of the motor stored in the storage device. Therefore, regardless of the amount of motor position deviation during the power-saving mode, when returning from the power-saving mode to the driving mode, the tape feeding device can rotate the motor to a predetermined rotational position, suppressing the position deviation of the sprocket. The same can be said for the tape feeding method described above.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments for Carrying Out the Invention

[0013] 1. Embodiment 1-1. Configuration Example of Component Mounting Machine 10 The tape feeding device 70 is applied to the tape feeder 20. The tape feeder 20 is mounted on the component supply device 12 of the component mounting machine 10. As shown in FIG. 1, the component mounting machine 10 of the present embodiment includes a substrate transfer device 11, a component supply device 12, a component transfer device 13, a component camera 14, a substrate camera 15, and a control device 16, and mounts a plurality of components 91 on a substrate 90.

[0014] The substrate transfer device 11 is constituted by, for example, a belt conveyor or the like, and transfers the substrate 90 in the transfer direction (X-axis direction). The substrate 90 is a circuit board on which an electronic circuit, an electric circuit, a magnetic circuit, or the like is formed. The substrate transfer device 11 loads the substrate 90 into the component mounter 10 and positions the substrate 90 at a predetermined position inside the machine. After the mounting process of a plurality of components 91 by the component mounter 10 is completed, the substrate transfer device 11 unloads the substrate 90 outside the component mounter 10.

[0015] The component supply device 12 supplies a plurality of components 91 to be mounted on the substrate 90. The component supply device 12 includes a plurality of feeders 12b provided along the transfer direction (X-axis direction) of the substrate 90. Each of the plurality of feeders 12b is detachably attached to the slot 12a. In the present embodiment, the feeder 12b is a tape feeder 20. The tape feeder 20 pitch-feeds a carrier tape 80 in which a plurality of components 91 are stored and supplies the components 91 so that they can be picked up at the supply position 21a.

[0016] The component transfer device 13 includes a head drive device 13a, a moving stage 13b, a mounting head 13c, and a holding member 13d. The head drive device 13a is configured to be able to move the moving stage 13b in the X-axis direction and the Y-axis direction (a direction orthogonal to the X-axis direction in the horizontal plane) by a linear motion mechanism. The mounting head 13c is detachably (replaceably) provided on the moving stage 13b by a clamp member. The mounting head 13c picks up and holds the component 91 supplied by the component supply device 12 using at least one holding member 13d and mounts the component 91 on the substrate 90 positioned by the substrate transfer device 11. As the holding member 13d, for example, a suction nozzle, a chuck, or the like can be used.

[0017] The component camera 14 and the board camera 15 can use known imaging devices. The component camera 14 is fixed to the base of the component mounter 10 so that the optical axis is upward in the vertical direction (the Z-axis direction orthogonal to the X-axis direction and the Y-axis direction). The component camera 14 can image the component 91 held by the holding member 13d from below. The board camera 15 is provided on the moving table 13b of the component transfer device 13 so that the optical axis is downward in the vertical direction (the Z-axis direction). The board camera 15 can image the board 90 and the like from above. The component camera 14 and the board camera 15 perform imaging based on a control signal sent from the control device 16. The image data of the images captured by the component camera 14 and the board camera 15 is transmitted to the control device 16.

[0018] The control device 16 includes a known arithmetic device and a storage device, and a control circuit is configured. Information output from various sensors provided in the component mounter 10, image data, and the like are input to the control device 16. The control device 16 sends a control signal to each device based on a control program and predetermined mounting conditions set in advance.

[0019] For example, the control device 16 causes the board camera 15 to image the board 90 positioned by the board transfer device 11. The control device 16 performs image processing on the image captured by the board camera 15 to recognize the positioning state of the board 90. Further, the control device 16 causes the component supply device 12 to collect and hold the component 91 supplied by the component supply device 12 on the holding member 13d, and causes the component camera 14 to image the component 91 held by the holding member 13d. The control device 16 performs image processing on the image captured by the component camera 14 to recognize the holding posture of the component 91.

[0020] The control device 16 moves the holding member 13d upward toward a planned mounting position preset by a control program or the like. Further, the control device 16 corrects the planned mounting position based on the positioning state of the substrate 90, the holding posture of the component 91, etc., and sets a mounting position where the component 91 is actually mounted. The planned mounting position and the mounting position include a rotation angle in addition to the position (X-axis coordinate and Y-axis coordinate).

[0021] The control device 16 corrects the target position (X-axis coordinate and Y-axis coordinate) and the rotation angle of the holding member 13d according to the mounting position. The control device 16 lowers the holding member 13d at the corrected rotation angle at the corrected target position to mount the component 91 on the substrate 90. The control device 16 executes a mounting process of mounting a plurality of components 91 on the substrate 90 by repeating the above pick-and-place cycle.

[0022] 1-2. Configuration example of the tape feeder 20 The tape feeder 20 supplies the component 91 so as to be collectable at the supply position 21a. The tape feeder 20 may take various forms as long as it can supply the component 91. As shown in FIG. 2, the tape feeder 20 of the present embodiment includes a feeder main body 21, a drive device 30, an angle sensor 40, a detection sensor 50, a feeder control device 60, and a position sensor 20s. The angle sensor 40 is included in the position sensor 20s.

[0023] The feeder main body 21 is formed in a flat box shape and has a supply position 21a for supplying the component 91 to the component mounting machine 10. The supply position 21a is formed at the upper part on the front end side (the right side in the drawing of FIG. 2) of the feeder main body 21. Further, the feeder main body 21 detachably (replaceably) holds a tape reel 80R around which a carrier tape 80 is wound. The tape reel 80R is rotatably supported with respect to the feeder main body 21. As shown in FIG. 3, the carrier tape 80 includes a plurality of cavities 81, a plurality of feed holes 82, and a cover tape 83. Each of the plurality of cavities 81 houses the component 91. The plurality of feed holes 82 are formed at predetermined intervals in the transport direction (the longitudinal direction of the carrier tape 80).

[0024] The cover tape 83 is adhered to the upper surface of the carrier tape 80, and the openings of each of the plurality of cavities 81 are closed. In the part of the carrier tape 80 that has been transported to the supply position 21a, the cover tape 83 is peeled off so that the component mounting machine 10 can collect the component 91. That is, the tape feeder 20 peels off the cover tape 83 while transporting the carrier tape 80, and positions the plurality of cavities 81 in order at the supply position 21a. Thereby, the component 91 stored in the positioned cavity 81 can be collected by the component mounting machine 10.

[0025] The plurality of cavities 81 are formed at predetermined intervals in the transport direction (the longitudinal direction of the carrier tape 80), similarly to the plurality of feed holes 82. The interval T1 of the cavities 81 is appropriately set according to the dimensions of the component 91 to be housed and the like. As shown in FIG. 3, in the present embodiment, the interval T1 of the cavities 81 is set to an integer multiple (four times in the figure) of one or more times the interval T2 of the feed holes 82.

[0026] As shown in FIG. 4, the driving device 30 includes a sprocket 31, a motor 32, a reduction gear 33, and an intermediate gear 34. The sprocket 31 pitch-feeds a carrier tape 80 that houses the component 91. The sprocket 31 is rotatably supported by the feeder main body 21 and includes a plurality of tooth portions 31a and a sprocket gear 31b. The plurality of tooth portions 31a are formed along the circumferential direction of the sprocket 31 at the same interval as the interval T2 between the plurality of feed holes 82 provided in the carrier tape 80. The plurality of tooth portions 31a sequentially engage with the plurality of feed holes 82 to pitch-feed the carrier tape 80.

[0027] The motor 32 rotates the sprocket 31. The motor 32 may take various forms as long as it can rotate the sprocket 31 to convey the carrier tape 80 and position the component 91 housed in the cavity 81 at the supply position 21a. For example, the motor 32 can use a known stepping motor, a servo motor, or the like.

[0028] The motor 32 includes a rotating shaft 32a and a drive gear 32b. When the rotating shaft 32a rotates, the reduction gear 33 that meshes with the drive gear 32b provided on the rotating shaft 32a rotates. The driving force of the motor 32 is transmitted to the sprocket 31 via the intermediate gear 34 that meshes with the reduction gear 33. The intermediate gear 34 meshes with the sprocket gear 31b provided on the sprocket 31, and the sprocket 31 rotates as the intermediate gear 34 rotates.

[0029] The angle sensor 40 detects the rotational position (rotation angle) of the sprocket 31. The angle sensor 40 may take various forms as long as it can detect the rotational position of the sprocket 31. For example, a known encoder (rotary encoder) can be used as the angle sensor 40. As shown in FIG. 5, the angle sensor 40 of the present embodiment includes a magnet body 41 and a pair of magnetic sensors 42, 42. The magnet body 41 is formed in a cylindrical shape and magnetized in two poles in the radial direction. The magnet body 41 is provided coaxially with the sprocket 31 so as to rotate integrally with the sprocket 31.

[0030] Each of the pair of magnetic sensors 42, 42 detects the magnetic field formed by the magnet body 41 and outputs a sine-wave detection signal. The pair of magnetic sensors 42, 42 are separated at intervals of 90 degrees along the circumferential direction of the magnet body 41 and provided on the feeder main body 21. Thereby, the detection signals output by the pair of magnetic sensors 42, 42 have a phase difference of 90 degrees. The angle sensor 40 detects the rotational position of the sprocket 31 provided with the magnet body 41 based on the two detection signals detected by the pair of magnetic sensors 42, 42.

[0031] The detection sensor 50 detects one tooth portion 31a among a plurality of tooth portions 31a of the sprocket 31. The detection sensor 50 of the present embodiment includes a light emitting portion 51 and a light receiving portion 52. As shown in FIGS. 4 and 5, the light emitting portion 51 and the light receiving portion 52 are arranged to face each other across the tooth portion 31a at the outer edge portion of the sprocket 31. The detection sensor 50 receives the light irradiated from the light emitting portion 51 by the light receiving portion 52. The detection sensor 50 detects that one tooth portion 31a among the plurality of tooth portions 31a is located between the light emitting portion 51 and the light receiving portion 52 when the light receiving state of the light receiving portion 52 transitions to a light-shielded state.

[0032] Specifically, when one of the plurality of cavities 81 of the carrier tape 80 is positioned at the supply position 21a of the tape feeder 20, the detection sensor 50 detects one tooth portion 31a existing at the detection position. In the present embodiment, the detection position is provided at a position separated by 120 degrees in the circumferential direction from directly above the rotation center of the sprocket 31 in the vertical direction. Note that the detection sensor 50 only needs to be able to detect the tooth portion 31a and can take various forms. For example, the detection sensor 50 can also detect the tooth portion 31a existing at the detection position by detecting the reflected light reflected by the tooth portion 31a.

[0033] The feeder control device 60 includes a known arithmetic device and a storage device, and a control circuit is configured. Information output from various sensors provided in the tape feeder 20 and the like is input to the feeder control device 60. When the tape feeder 20 is mounted on the component mounter 10 (the slot 12a of the component supply device 12), power is supplied to the feeder control device 60 from the component mounter 10 via the connector 21b. Further, the feeder control device 60 can communicate with the component mounter 10 via the connector 21b.

[0034] The feeder control device 60 drives and controls the drive device 30 based on a command transmitted from the component mounter 10. Specifically, for example, when the motor 32 is a stepping motor, the feeder control device 60 transmits a pulse signal (drive signal) to the motor 32. When the motor 32 is a servo motor, the feeder control device 60 transmits a position command (drive signal) to the motor 32. In any case, based on the drive signal, the motor 32 is driven, the sprocket 31 rotates, and the plurality of cavities 81 of the carrier tape 80 are sequentially positioned at the supply position 21a.

[0035] Note that when the power is turned on to the tape feeder 20, the feeder control device 60 executes the origin adjustment of the sprocket 31. In the origin adjustment, the control origin position is set. In the present embodiment, the feeder control device 60 rotates the motor 32 to rotate the sprocket 31 until the detection sensor 50 detects a predetermined angle at which one of the plurality of tooth portions 31a is detected.

[0036] As a result, the sprocket 31 is angled such that the tooth portion 31a that is 120 degrees circumferentially separated from the tooth portion 31a detected by the detection sensor 50 is positioned vertically above the rotation center of the sprocket 31. The feeder control device 60 can set the position (for example, the center) of the tooth portion 31a as the origin position.

[0037] The position sensor 20s detects the rotational position (rotation angle) of at least one of the sprocket 31 and the motor 32. The angle sensor 40 described above is included in the position sensor 20s and detects the rotational position of the sprocket 31. As shown in FIG. 4, in the present embodiment, the position sensor 20s includes an angle sensor 32c that detects the rotational position (rotation angle) of the motor 32. The angle sensor 32c may take various forms as long as it can detect the rotational position of the motor 32. For example, a known encoder (rotary encoder) can be used as the angle sensor 32c.

[0038] The angle sensor 32c of the present embodiment is an encoder (rotary encoder) and detects the rotational position (rotation angle) of the rotation shaft 32a of the motor 32. The angle sensor 32c may be an incremental method that detects the relative rotational position (relative angle) with respect to the reference position, or an absolute method that detects the absolute rotational position (absolute angle). When the angle sensor 32c is an incremental method, for example, the reference position can use the origin position set by the origin adjustment described above.

[0039] The feeder control device 60 drives and controls the motor 32. The feeder control device 60 can also drive and control the motor 32 based on the detection result of the position sensor 20s. For example, when the motor 32 is a servo motor, the feeder control device 60 drives and controls the motor 32 so that the rotational position of the motor 32 detected by the angle sensor 32c becomes the target rotational position. The feeder control device 60 can perform various known drive controls. For example, the feeder control device 60 can perform feedback control using at least one of proportional control, integral control, and derivative control. The feeder control device 60 can also perform feedforward control.

[0040] In addition, when the motor 32 is a stepping motor, the feeder control device 60 can drive and control the motor 32 regardless of the detection result of the position sensor 20s (open-loop control). Even when the motor 32 is a stepping motor, the feeder control device 60 can drive and control the motor 32 (for example, feedback control, feedforward control) in the same manner as in the case of a servo motor.

[0041] Also, when driving and controlling the motor 32 using the rotational position of the sprocket 31 detected by the angle sensor 40, the feeder control device 60 calculates the rotational position of the motor 32 from the rotational position of the sprocket 31 based on the reduction ratio by the reduction gears 33 and the intermediate gear 34. For example, when the reduction ratio is 1 / G0, when the motor 32 rotates G0 times (rotates 360×G0 degrees), the sprocket 31 rotates once (rotates 360 degrees). In this case, the rotational position of the motor 32 becomes the rotational position obtained by multiplying the rotational position of the sprocket 31 detected by the angle sensor 40 by G0.

[0042] The greater the deceleration, the more likely the error between the calculated value of the rotational position of the motor 32 and the actual rotational position of the motor 32 becomes. Therefore, it is advisable for the position sensor 20s to detect the rotational position of the motor 32. The position sensor 20s of the present embodiment includes an angle sensor 32c and can detect the rotational position of the motor 32. Thus, the feeder control device 60 of the present embodiment can improve the control accuracy when driving and controlling the motor 32 as compared with the case of using the detection result of the rotational position of the sprocket 31.

[0043] Also, the position sensor 20s of the present embodiment includes both an angle sensor 40 that detects the rotational position of the sprocket 31 and an angle sensor 32c that detects the rotational position of the motor 32. Therefore, the feeder control device 60 can also know the rotational position of the sprocket 31.

[0044] Furthermore, the motor 32 of the present embodiment is a stepping motor or a servo motor, and the position sensor 20s is an encoder. Thus, the feeder control device 60 can drive and control the stepping motor or the servo motor based on the detection result of the encoder.

[0045] 1-3. Configuration Example of Tape Feeding Device 70 When it is not necessary to pitch-feed the carrier tape 80 for a predetermined time, if the same supply power as in the case of pitch-feeding the carrier tape 80 is supplied to the motor 32, the tape feeder 20 consumes wasted power. Therefore, when it is not necessary to pitch-feed the carrier tape 80 for a predetermined time, it is assumed that the supply power supplied to the motor 32 is reduced as compared with the case of pitch-feeding the carrier tape 80.

[0046] However, when the supply power supplied to the motor 32 is reduced, the holding force for holding the rotational position of the stopped motor 32 decreases. Therefore, the displacement of the rotational position of the motor 32 is likely to occur due to an external force. When the displacement of the rotational position of the motor 32 occurs, the sprocket 31 may be displaced beyond the allowable range, which may interfere with the supply of the component 91.

[0047] Also, in order to eliminate the displacement of the sprocket 31, it is assumed that the origin adjustment described above is performed. However, for the origin adjustment, it is necessary to detect the tooth portion 31a of the sprocket 31 by the detection sensor 50. The rotational speed of the motor 32 when the tooth portion 31a is detected by the detection sensor 50 is lower than that when the carrier tape 80 is pitch-fed. Therefore, the required time until the carrier tape 80 can be pitch-fed may increase. Thus, the component mounting machine 10 of the present embodiment is provided with a tape feeding device 70.

[0048] The tape feeding device 70 is applied to the tape feeder 20 including the sprocket 31, the motor 32, the position sensor 20s, and the feeder control device 60. When the tape feeding device 70 is regarded as a control block, it includes a storage unit 71 and a drive unit 72. The storage unit 71 and the drive unit 72 can be provided in various control devices. For example, the storage unit 71 and the drive unit 72 can be provided in the feeder control device 60 of the tape feeder 20. The storage unit 71 and the drive unit 72 can also be provided in the control device 16 of the component mounting machine 10. The storage unit 71 and the drive unit 72 can also be formed on the cloud.

[0049] As shown in FIG. 6, in the present embodiment, the storage unit 71 and the drive unit 72 are provided in the feeder control device 60 of the tape feeder 20. Also, the tape feeding device 70 executes control according to the flowchart shown in FIG. 7. The storage unit 71 performs the determination shown in step S11 and the process shown in step S12. The drive unit 72 performs the determination shown in step S13 and the processes shown in steps S14 and S15.

[0050] 1-3-1. Memory unit 71 When the carrier tape 80 is pitch-fed, the control mode of the motor 32 is set as the drive mode. Also, when it is not necessary to pitch-feed the carrier tape 80 for a predetermined time, the control mode that reduces the supply power supplied to the motor 32 compared to the drive mode is set as the power-saving mode. The power-saving mode only needs to reduce the supply power supplied to the motor 32 compared to the drive mode, and the degree of reduction of the supply power is not limited.

[0051] For example, in the power-saving mode, the supply power supplied to the motor 32 can also be cut off. Thereby, the power consumption of the tape feeder 20 during the power-saving mode can be reduced to the maximum extent. In this case as well, the power required for control such as the drive power of the feeder control device 60 and the drive power of various sensors including the position sensor 20s is supplied from the component mounter 10 via the connector 21b shown in FIG. 2 etc.

[0052] The memory unit 71 causes the storage device 70m to store the rotational position of the motor 32 immediately before shifting from the drive mode to the power-saving mode. Specifically, the memory unit 71 determines whether to shift from the drive mode to the power-saving mode (step S11 shown in FIG. 7). For example, the feed instruction for pitch-feeding the carrier tape 80 is transmitted via the connector 21b. When the feed instruction is not received for a certain period of time, it is not necessary to pitch-feed the carrier tape 80, and the power-saving mode can be entered.

[0053] Therefore, when the memory unit 71 does not receive the feed instruction for pitch-feeding the carrier tape 80 from the component mounter 10 (for example, the control device 16) that mounts the component 91 on the substrate 90 for a certain period of time, it can be determined that the mode has shifted from the drive mode to the power-saving mode. When the memory unit 71 receives the feed instruction from the component mounter 10 within a certain period of time, it can be determined that the drive mode continues. In this way, the memory unit 71 can determine the shift from the drive mode to the power-saving mode based on whether the feed instruction is received within a certain period of time.

[0054] Further, the tape feeder 20 can also receive a transition instruction to shift from the component mounting machine 10 to the power saving mode. The transition instruction is transmitted via the connector 21b in the same manner as the feed instruction. When receiving a transition instruction to shift to the power saving mode, it is not necessary to pitch-feed the carrier tape 80, and the power saving mode can be entered.

[0055] Therefore, when the storage unit 71 receives a transition instruction to shift from the component mounting machine 10 (for example, the control device 16) that mounts the component 91 on the substrate 90 to the power saving mode, the storage unit 71 can also determine that the mode has shifted from the drive mode to the power saving mode. Note that when the storage unit 71 does not receive a transition instruction to shift from the component mounting machine 10 to the power saving mode, the storage unit 71 can also determine that the drive mode continues. In this way, the storage unit 71 can also determine the transition from the drive mode to the power saving mode based on whether a transition instruction to shift to the power saving mode is received.

[0056] When shifting from the drive mode to the power saving mode (Yes in step S11), the storage unit 71 causes the storage device 70m to store the rotational position of the motor 32 immediately before the shift (step S12). The rotational position of the motor 32 immediately before the shift can be detected by the position sensor 20s. As described above, in the present embodiment, the position sensor 20s includes the angle sensor 32c. The angle sensor 32c can detect the rotational position of the motor 32 immediately before the shift.

[0057] The position sensor 20s can also detect the rotational position of the sprocket 31. In this case, the feeder control device 60 calculates the rotational position of the motor 32 immediately before the shift from the rotational position of the sprocket 31 immediately before the shift. In any case, the rotational position of the motor 32 immediately before the shift can be stored in various storage devices 70m. The storage device 70m may be a storage device provided in the feeder control device 60 or a storage device provided in the control device 16 of the component mounting machine 10. Further, the storage device 70m can also be formed on the cloud.

[0058] As shown in FIG. 6, in this embodiment, the storage device 70m is a storage device provided in the feeder control device 60. When the storage unit 71 determines to continue the drive mode and does not shift from the drive mode to the power saving mode (No in step S11), the control by the tape feeding device 70 returns to the determination shown in step S11. Then, the storage unit 71 waits until shifting from the drive mode to the power saving mode.

[0059] 1-3-2. Drive unit 72 When the drive unit 72 returns from the power saving mode to the drive mode, it rotates the motor 32 to the rotational position of the motor 32 stored in the storage device 70m. Specifically, the storage unit 71 determines whether to shift (return) from the power saving mode to the drive mode (step S13). For example, the drive unit 72 can determine that it has shifted (returned) from the power saving mode to the drive mode when a preset specified time has elapsed since shifting from the drive mode to the power saving mode.

[0060] Also, when the preset specified time has not elapsed since shifting from the drive mode to the power saving mode, the drive unit 72 can determine that the power saving mode is continuing. In this way, the drive unit 72 can determine the shift (return) from the power saving mode to the drive mode based on the presence or absence of the elapse of the specified time. The specified time may be the same as or different from the above-mentioned fixed time. The above-mentioned predetermined time, fixed time, and specified time can be arbitrarily set.

[0061] The tape feeder 20 can also receive a transition instruction to shift (return) to the drive mode from the component mounting machine 10 (e.g., the control device 16). The transition instruction to shift to the drive mode is transmitted via the connector 21b, similar to the feed instruction and the transition instruction to shift to the power saving mode. When the drive unit 72 receives a transition instruction to shift to the drive mode from the component mounting machine 10, it can also determine that it has shifted from the power saving mode to the drive mode. Further, when the drive unit 72 does not receive a transition instruction to shift to the drive mode from the component mounting machine 10, it can also determine that the power saving mode is continuing. Thus, the drive unit 72 can also determine the transition (return) from the power saving mode to the drive mode based on whether it has received a transition instruction to shift to the drive mode.

[0062] When shifting (returning) from the power saving mode to the drive mode (Yes in step S13), the drive unit 72 acquires the rotational position of the motor 32 stored in the storage device 70m (step S14). Specifically, the drive unit 72 reads out from the storage device 70m the rotational position of the motor 32 immediately before shifting from the drive mode to the power saving mode. Then, the drive unit 72 rotationally drives the motor 32 to the rotational position of the motor 32 stored in the storage device 70m (step S15).

[0063] FIG. 8 shows an example of the positional deviation of the carrier tape 80 during the power saving mode. The position P0 shows an example of the position on the carrier tape 80 corresponding to the rotational position M0 of the motor 32 immediately before shifting from the drive mode to the power saving mode. The position P1 shows an example of the position on the carrier tape 80 corresponding to the rotational position M1 of the motor 32 immediately before shifting (returning) from the power saving mode to the drive mode. The distance between the position P0 and the position P1 indicates the amount of positional deviation by which the carrier tape 80 has deviated during the power saving mode, and indicates the amount of positional deviation by which the sprocket 31 has deviated during the power saving mode.

[0064] The position sensor 20s detects the rotational position of at least one of the sprocket 31 and the motor 32 in both the drive mode and the power-saving mode. In the present embodiment, the position sensor 20s detects the rotational position of the motor 32 in both the drive mode and the power-saving mode. The storage unit 71 acquires, from the position sensor 20s, the rotational position of the motor 32 immediately before shifting from the drive mode to the power-saving mode (the rotational position M0 of the motor 32 corresponding to the position P0), and stores it in the storage device 70m. The drive unit 72 can acquire, from the storage device 70m, the rotational position of the motor 32 immediately before shifting from the drive mode to the power-saving mode (the rotational position M0 of the motor 32 corresponding to the position P0).

[0065] Further, the drive unit 72 can acquire, from the position sensor 20s, the rotational position of the motor 32 immediately before shifting (returning) from the power-saving mode to the drive mode (the rotational position M1 of the motor 32 corresponding to the position P1). Therefore, the drive unit 72 rotates the motor 32 by the amount of positional deviation obtained by subtracting the rotational position M1 of the motor 32 corresponding to the position P1 from the rotational position M0 of the motor 32 corresponding to the position P0. Thereby, regardless of the amount of positional deviation of the motor 32 during the power-saving mode, when returning from the power-saving mode to the drive mode, the drive unit 72 can rotate the motor 32 to the rotational position of the motor 32 immediately before shifting from the drive mode to the power-saving mode (the rotational position M0 of the motor 32 corresponding to the position P0).

[0066] Note that when the process shown in step S15 ends, the control by the tape feeding device 70 temporarily ends. Also, when the drive unit 72 determines to continue the power-saving mode and does not shift from the power-saving mode to the drive mode (in the case of No in step S13), the control by the tape feeding device 70 returns to the determination shown in step S13. Then, the drive unit 72 waits until shifting from the power-saving mode to the drive mode.

[0067] 1-3-3. Modified Forms of the Drive Unit 72 The tape feeding device 70 can also execute control according to, for example, the flowchart shown in FIG. 9. In the control shown in this figure, the determination shown in step S13 shown in FIG. 7 is changed to the determination shown in step S13a. Also, the process shown in step S15 shown in FIG. 7 is changed to the processes shown in steps S15a and S15b. Other processes in FIG. 9 are the same as the processes shown in FIG. 7, and duplicate explanations are omitted in this specification.

[0068] In this mode, when the drive unit 72 receives a feed instruction to pitch-feed the carrier tape 80 in the power-saving mode, it returns from the power-saving mode to the drive mode. Also, the drive unit 72 rotates the motor 32 to a target position PG0 obtained by adding the rotation amount of the motor 32 for pitch-feeding the carrier tape 80 by the feed amount L1 indicated by the feed instruction to the rotation position of the motor 32 stored in the storage device 70m.

[0069] When a feed instruction to pitch-feed the carrier tape 80 is received during the power-saving mode, it is necessary to shift (return) from the power-saving mode to the drive mode. Therefore, the drive unit 72 determines whether a feed instruction has been received during the power-saving mode (step S13a). As described above, the feed instruction is transmitted via the connector 21b.

[0070] When a feed instruction is received during the power-saving mode (Yes in step S13a), the drive unit 72 returns from the power-saving mode to the drive mode. Also, the drive unit 72 acquires the rotation position of the motor 32 stored in the storage device 70m (step S14). As described above, the rotation position of the motor 32 stored in the storage device 70m is the rotation position of the motor 32 immediately before shifting from the drive mode to the power-saving mode.

[0071] Next, the drive unit 72 calculates the target position PG0 of the motor 32 (step S15a). The drive unit 72 calculates the target position PG0 by adding the rotation amount MR0 of the motor 32 for pitch-feeding the carrier tape 80, which is the amount of feed L1 indicated by the feed instruction, to the rotation position of the motor 32 stored in the storage device 70m. The feed amount L1 indicated by the feed instruction is the feed amount necessary to move the component 91 to be supplied next to the component 91 supplied immediately before shifting to the power saving mode to the same supply position 21a.

[0072] FIG. 10 shows an example of the relationship between the target position PG0 and the supply position 21a. The position P0 shows an example of the position on the carrier tape 80 corresponding to the rotation position M0 of the motor 32 immediately before shifting from the drive mode to the power saving mode. The figure shows the carrier tape 80 immediately before shifting from the drive mode to the power saving mode, and the position P0 coincides with the supply position 21a. Also, the position P0 coincides with the center of the cavity 81 that housed the component 91 supplied immediately before shifting to the power saving mode.

[0073] The position N0 indicates the center of the cavity 81 that houses the component 91 to be supplied next to the component 91 supplied immediately before shifting to the power saving mode. In order to supply the component 91 at the supply position 21a, it is necessary to pitch-feed the carrier tape 80 by the interval T1 between the cavities 81. Also, for example, the interval T1 between the cavities 81 is set to four times the interval T2 between the feed holes 82. In this case, the feed amount L1 indicated by the feed instruction is the interval T1 between the cavities 81 and four times the interval T2 between the feed holes 82.

[0074] Let the rotation amount of the motor 32 for pitch-feeding the carrier tape 80 by the above feed amount L1 be the rotation amount MR0. At this time, the drive unit 72 sets the addition value obtained by adding the rotation amount MR0 of the motor 32 for pitch-feeding the carrier tape 80 by the feed amount L1 to the rotation position M0 of the motor 32 immediately before shifting from the drive mode to the power saving mode as the target position PG0. Then, the drive unit 72 rotates the motor 32 to the target position PG0 (step S15b).

[0075] Accordingly, the drive unit 72 can rotate the motor 32 to a target position PG0 where the component 91 to be supplied next to the component 91 supplied immediately before shifting to the power saving mode can be supplied at the same supply position 21a. As described above, there is a possibility that the position of the motor 32 may shift during the power saving mode. Also in this case, the drive unit 72 can rotate the motor 32 to the target position PG0 regardless of the amount of position shift of the motor 32 during the power saving mode.

[0076] Note that when the process shown in step S15b ends, the control by the tape feeding device 70 temporarily ends. Also, when no feeding instruction is received during the power saving mode (No in step S13a), the control by the tape feeding device 70 returns to the determination shown in step S13a. Then, the drive unit 72 waits until a feeding instruction is received during the power saving mode.

[0077] 2. Others The above-described embodiment has been described by taking the cassette-type tape feeder 20 in which the tape reel 80R is covered by the feeder main body 21 as an example. However, the tape feeding device 70 can also be applied to a tape feeder in which the tape reel 80R is exposed from the feeder main body 21.

[0078] 3. Tape Feeding Method What has been described above regarding the tape feeding device 70 can be similarly said about the tape feeding method. Specifically, the tape feeding method is applied to the tape feeder 20 including the sprocket 31, the motor 32, the position sensor 20s, and the feeder control device 60. The tape feeding method includes a storage process and a drive process. The storage process corresponds to the control performed by the storage unit 71. The drive process corresponds to the control performed by the drive unit 72. The control performed by the drive unit 72 may be the control described above in the embodiment or the control described above in the modified form.

[0079] 4. An Example of the Effects of the Embodiment and the Modified Form According to the tape feeding device 70, the rotation position of the motor 32 immediately before shifting from the driving mode to the power saving mode is stored in the storage device 70m, and when returning from the power saving mode to the driving mode, the rotation position of the motor 32 stored in the storage device 70m is used to rotate the motor 32 to a predetermined rotation position. Therefore, regardless of the amount of displacement of the motor 32 during the power saving mode, the tape feeding device 70 can rotate the motor 32 to a predetermined rotation position when returning from the power saving mode to the driving mode, and can suppress the displacement of the sprocket 31. What has been described above for the tape feeding device 70 can be similarly said for the tape feeding method.

Explanation of Signs

[0080] 10: Component mounting machine, 20: Tape feeder, 20s: Position sensor, 21a: Feeding position, 31: Sprocket, 32: Motor, 60: Feeder control device, 70: Tape feeding device, 70m: Storage device, 71: Storage unit, 72: Driving unit, 80: Carrier tape, 90: Substrate, 91: Component, L1: Feeding amount, PG0: Target position.

Claims

1. A sprocket for pitch-feeding a carrier tape that houses components, a motor that rotates the sprocket, a position sensor that detects the rotational position of at least one of the sprocket and the motor, a feeder control device that drives and controls the motor, applied to a tape feeder comprising: When the control mode of the motor when pitch-feeding the carrier tape is a drive mode, and the supply power supplied to the motor when it is not necessary to pitch-feed the carrier tape for a predetermined time is reduced compared to the drive mode, and this control mode is a power-saving mode, a storage unit that causes a storage device to store the rotational position of the motor immediately before shifting from the drive mode to the power-saving mode; When receiving a feed instruction to pitch-feed the carrier tape in the power-saving mode, a drive unit that returns from the power-saving mode to the drive mode and rotates the motor to a target position obtained by adding the rotational amount of the motor for pitch-feeding the carrier tape by the feed amount indicated by the feed instruction to the rotational position of the motor stored in the storage device; A tape feeding device comprising:

2. The tape feeding device according to claim 1, wherein the feed amount indicated by the feed instruction is a feed amount necessary to move the component to be supplied next to the component supplied immediately before shifting to the power-saving mode to the same supply position.

3. The tape feeding device according to claim 1 or claim 2, wherein the storage unit determines that a shift has been made from the drive mode to the power-saving mode when it has not received a feed instruction to pitch-feed the carrier tape from a component mounting machine that mounts the components on a substrate for a certain period of time.

4. The tape feeding device according to claim 1 or claim 2, wherein the storage unit determines that a shift has been made from the drive mode to the power-saving mode when it has received a shift instruction to shift to the power-saving mode from a component mounting machine that mounts the components on a substrate.

5. The tape feeding device according to any one of claims 1 to 4, wherein the position sensor detects the rotational position of the motor.

6. The tape feeding device according to any one of claims 1 to 5, wherein the power-saving mode cuts off the supply power supplied to the motor.

7. The motor is a stepping motor or a servo motor, The tape feeding device according to any one of claims 1 to 6, wherein the position sensor is an encoder.

8. A sprocket for pitch-feeding a carrier tape for accommodating components, A motor for rotating the sprocket, A position sensor for detecting the rotational position of at least one of the sprocket and the motor, A feeder control device for driving and controlling the motor, Applied to a tape feeder comprising, When the control mode of the motor when pitch-feeding the carrier tape is a drive mode, and the control mode for reducing the supply power supplied to the motor when it is not necessary to pitch-feed the carrier tape for a predetermined time compared to the drive mode is a power-saving mode, A storage step of storing the rotational position of the motor immediately before shifting from the drive mode to the power-saving mode in a storage device, When receiving a feed instruction to pitch-feed the carrier tape in the power-saving mode, returning from the power-saving mode to the drive mode and rotating the motor to a target position obtained by adding the amount of rotation of the motor for pitch-feeding the carrier tape by the feed amount indicated by the feed instruction to the rotational position of the motor stored in the storage device, a driving step; A tape feeding method comprising.

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