Printer and method for calibrating printer accuracy

Abstract

The application discloses a printer and a printer precision calibration method, the printer comprises a workbench, a motor, a controller and a connecting device; a temperature sensor is installed on the motor; the connecting device comprises a workbench mounting seat and a motor mounting seat, first and second heat insulation bosses are respectively arranged on opposite sides of the motor mounting seat; opposite ends of the motor mounting seat are respectively configured as heat dissipation and flow guide structures. In this way, the first and second heat insulation bosses are arranged for heat insulation, when the workbench moves to drive the surrounding air to flow, the heat dissipation and flow guide structures can guide the air flow to enter the gaps formed between the motor mounting seat, the workbench mounting seat and the motor rotor, thereby enhancing the heat dissipation effect of the motor; the temperature sensor can obtain the temperature value of the motor, so that the printer precision calibration can be performed in time in a non-calibration time period, the precision of the printer is prevented from being affected, and the normal work of the printer is prevented from being affected by frequent calibration.

Description

Technical Field

[0001] This invention relates to the field of printer technology, and more particularly to a printer and a method for printer accuracy calibration. Background Technology

[0002] Printers include motors that drive the movement of the worktable. Motors generate a lot of heat when they are working. The motors themselves have weak heat dissipation capabilities, which can lead to localized heat accumulation. If heat cannot be dissipated in time, the mounting bracket connected to the motor will experience thermal stress. Since the mounting bracket is installed on the printer, this will affect the printer's accuracy.

[0003] Traditional printers typically cool their motors using water, air, or natural cooling methods, which are not very effective. Furthermore, the motors lack temperature sensors. Printers are set to calibrate their accuracy at fixed intervals (usually one hour). If the motor temperature fluctuates significantly outside of these calibration periods, it can affect the printer's accuracy. However, frequent calibrations are time-consuming and disrupt normal printer operation. Summary of the Invention

[0004] The purpose of this invention is to provide a printer and a printer accuracy calibration method that can perform printer accuracy calibration in a timely manner when the motor temperature changes significantly during non-calibration periods, thereby avoiding the impact of motor temperature changes on printer accuracy and also avoiding the waste of time and disruption of normal printer operation due to frequent calibration.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] On one hand, the present invention provides a printer, including a worktable, a motor, a controller, and a connection device;

[0007] The motor is used to drive the worktable to move, and the controller is used to control the printer's operation; a temperature sensor is installed on the motor, and the temperature sensor is communicatively connected to the controller, and the temperature sensor is used to collect the temperature information of the motor;

[0008] The connecting device includes a workbench mounting base and a motor mounting base. The workbench is mounted on the workbench mounting base; the motor mounting base is mounted on the side of the workbench mounting base opposite to the workbench, and the motor is mounted on the side of the motor mounting base opposite to the workbench mounting base.

[0009] The motor mounting base is provided with a first heat-insulating boss and a second heat-insulating boss on opposite sides, respectively. The first heat-insulating boss is located between the workbench mounting base and the motor mounting base, and the second heat-insulating boss is located between the motor mounting base and the motor.

[0010] The opposite ends of the motor mounting base are respectively constructed as heat dissipation and airflow guiding structures, and the thickness of the heat dissipation and airflow guiding structures decreases in the direction away from the center of the motor mounting base.

[0011] In one embodiment of the present invention, heat dissipation fins are respectively installed on the opposite sides of the motor mover of the motor for dissipating heat from the motor mover.

[0012] In one embodiment of the present invention, the heat dissipation fins are made of aluminum alloy.

[0013] In one embodiment of the present invention, a thermally conductive pad is provided between the motor actuator and the heat dissipation fins.

[0014] In one embodiment of the present invention, the thermal pad is a thermally conductive silicone sheet or a graphite thermally conductive sheet.

[0015] In one embodiment of the present invention, along the thickness direction of the heat dissipation guiding structure, the angle between the opposite two sides of the heat dissipation guiding structure and the center line of the motor mounting base is 30°-60°; wherein, the center line extends along the length direction of the motor mounting base.

[0016] In one embodiment of the present invention, the workbench mounting base is provided with a mounting positioning groove on the side facing the motor mounting base, and the motor mounting base is at least partially located in the mounting positioning groove.

[0017] In one embodiment of the present invention, the connecting device further includes a first fastener passing through the worktable mounting base and the motor mounting base to connect the worktable and the worktable mounting base; and / or

[0018] The connecting device further includes a second fastener that passes through the motor mounting base and the motor mover of the motor to connect the motor mounting base and the motor.

[0019] In one embodiment of the present invention, the height of the first heat-insulating boss is 1mm-2mm; and / or, the height of the second heat-insulating boss is 1mm-2mm; and / or, the motor mounting base is made of aluminum alloy.

[0020] On the other hand, the present invention provides a printer accuracy calibration method, applied to the printer described in the above embodiments, the printer accuracy calibration method comprising:

[0021] Obtain the temperature value X of the motor at set time intervals t. i For each of the aforementioned temperature values ​​X i Set a coefficient K i ;

[0022] If multiple consecutive coefficients K i If the sum of these coefficients equals 1, then the aforementioned coefficients K... i Each with the corresponding temperature value X i After multiplying and adding them all together, we get the equivalent temperature D.

[0023] Calculate the temperature fluctuation rate, which is equal to the difference between the current equivalent temperature D and the previous equivalent temperature D;

[0024] If the temperature fluctuation rate exceeds a set threshold, the printer is controlled to perform accuracy calibration.

[0025] The beneficial effects of this invention are:

[0026] This invention provides a printer and a printer accuracy calibration method. The printer includes a worktable, a motor, a controller, and a connecting device. The motor drives the worktable to move, and the controller controls the printer's operation. A temperature sensor is installed on the motor and is communicatively connected to the controller. The temperature sensor is used to collect the motor's temperature information. The connecting device includes a worktable mounting base and a motor mounting base. The worktable is mounted on the worktable mounting base. The motor mounting base is mounted on the side of the worktable mounting base away from the worktable, and the motor is mounted on the side of the motor mounting base away from the worktable mounting base. A first heat-insulating boss and a second heat-insulating boss are respectively provided on opposite sides of the motor mounting base. The first heat-insulating boss is located between the worktable mounting base and the motor mounting base, and the second heat-insulating boss is located between the motor mounting base and the motor. The opposite ends of the motor mounting base are respectively constructed as heat dissipation and airflow guiding structures, and the thickness of the heat dissipation and airflow guiding structures decreases in the direction away from the center of the motor mounting base.

[0027] Thus, by setting the first and second heat-insulating bosses for heat insulation, the impact of motor temperature on the motor mounting base and the worktable mounting base is reduced. By setting a heat dissipation and airflow guiding structure, when the worktable moves and causes surrounding air to circulate, the airflow formed by the airflow can be guided into the gaps between the motor mounting base, the worktable mounting base, and the motor mover, thereby further enhancing the heat dissipation effect of the motor. By setting a temperature sensor inside the motor, the temperature sensor can obtain the motor temperature value at set intervals as required. The controller calculates and judges the temperature change of the motor, thereby performing printer accuracy calibration in a timely manner during non-calibration periods. This can avoid the printer accuracy being affected by the motor temperature increasing, and also avoid frequent calibration affecting the normal operation of the printer. Attached Figure Description

[0028] Figure 1 This is an assembly diagram of the printer in an embodiment of the present invention;

[0029] Figure 2 yes Figure 1 Exploded view of the motor and connecting device;

[0030] Figure 3 yes Figure 1 Schematic diagram of the middle workbench mounting base and motor mounting base;

[0031] Figure 4 yes Figure 1 A partial front view of the printer;

[0032] Figure 5 yes Figure 4 Schematic diagram of the AA section;

[0033] Figure 6 This is a schematic flowchart of the printer accuracy calibration method in an embodiment of the present invention.

[0034] Explanation of icon numbers:

[0035] 1. Printer body; 2. Motor; 21. Motor mover; 22. Motor stator; 3. Connecting device; 31. Worktable mounting base; 311. Mounting positioning groove; 32. Motor mounting base; 321. First heat insulation boss; 322. Second heat insulation boss; 323. Heat dissipation and airflow guiding structure; 33. Heat dissipation fins; 34. First fastener; 35. Second fastener. Detailed Implementation

[0036] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0039] See Figure 1 and Figure 2 The present invention provides a printer, including a worktable (not shown in the figure), a motor 2, a controller (not shown in the figure), and a connecting device 3. The motor 2 is used to drive the worktable to move, and the controller is used to control the operation of the printer. Optionally, the motor 2 is a linear motor.

[0040] The controller can be a centralized controller or a distributed controller, depending on the actual needs. For example, the controller can be a single microcontroller or a combination of multiple distributed microcontrollers. The microcontroller can run a control program to control the printer's actions. The printer's actions can be printing, precision calibration, or the actions of the printer's components, such as starting and stopping motor 2.

[0041] A temperature sensor (not shown in the figure) is installed on motor 2. The temperature sensor is connected to the controller and is used to collect the temperature information of motor 2.

[0042] During the operation of motor 2, motor 2 generates a lot of heat. By installing a temperature sensor on motor 2, the temperature information of motor 2 can be collected and transmitted to the controller. The controller can issue corresponding control commands based on the received temperature information. For example, when the temperature of motor 2 changes significantly, the controller can control the printer to perform precision calibration to avoid affecting the accuracy of the printer due to high temperature.

[0043] It should be noted that the controller can display information on the printer's screen indicating that a precision calibration is needed due to large temperature variations in motor 2, so that printing personnel are aware of this. The controller can also pause printing and perform precision calibration through its built-in control program.

[0044] See Figure 2 and Figure 3Specifically, the connecting device 3 includes a worktable mounting base 31 and a motor mounting base 32, with the worktable mounted on the worktable mounting base 31. The motor mounting base 32 is mounted on the side of the worktable mounting base 31 opposite to the worktable, and the motor 2 is mounted on the side of the motor mounting base 32 opposite to the worktable mounting base 31. A first heat-insulating boss 321 and a second heat-insulating boss 322 are respectively protruded from opposite sides of the motor mounting base 32. The first heat-insulating boss 321 is located between the worktable mounting base 31 and the motor mounting base 32, and the second heat-insulating boss 322 is located between the motor mounting base 32 and the motor 2. The motor mounting base 32 is connected to the motor rotor 21 of the motor 2, and the motor stator 22 of the motor 2 is mounted between the printer body 1 of the printer and the side of the motor rotor 21 opposite to the motor mounting base 32.

[0045] Optionally, the motor mounting bracket 32 ​​is made of aluminum alloy. Of course, the material of the motor mounting bracket 32 ​​can also be selected according to actual usage needs.

[0046] Furthermore, in this embodiment, there are 8 first heat-insulating protrusions 321 spaced apart, with 4 first heat-insulating protrusions 321 arranged at each of the opposite ends along the width direction of the motor mounting base 32; there are 21 second heat-insulating protrusions 322 spaced apart, and all the second heat-insulating protrusions 322 are arranged in a matrix, with 3 rows of second heat-insulating protrusions 322 along the width direction of the motor mounting base 32 and 7 columns of second heat-insulating protrusions 322 along the length direction of the motor mounting base 32, and all the second heat-insulating protrusions 322 are located between two rows of first heat-insulating protrusions 321.

[0047] It is understood that the number and arrangement of the first heat-insulating boss 321 and the second heat-insulating boss 322 can be set according to actual use needs, and are not limited to the examples in this embodiment.

[0048] Thus, by providing a first heat-insulating boss 321 and a second heat-insulating boss 322 on opposite sides of the motor mounting base 32, the contact area between the motor mounting base 32 and the worktable mounting base 31, and between the motor mounting base 32 and the motor mover 21, can be reduced. At the same time, gaps can be formed between the motor mounting base 32 and the worktable mounting base 31, and between the motor mounting base 32 and the motor mover 21. When the motor 2 drives the worktable to move, it will drive air to form an airflow through the gaps, thereby enhancing the heat dissipation effect of the motor 2.

[0049] See Figure 2 and Figure 5Specifically, the opposite ends of the motor mounting base 32 are respectively constructed as heat dissipation guiding structures 323, and the thickness of the heat dissipation guiding structures 323 decreases in the direction away from the center of the motor mounting base 32. When the motor 2 drives the worktable to move, airflow is generated. Due to its structural characteristics, the heat dissipation guiding structure 323 can guide the airflow into the aforementioned gap, thereby further enhancing the heat dissipation effect of the motor 2.

[0050] In this embodiment, the height of the first heat-insulating boss 321 is 1mm-2mm, and the height of the second heat-insulating boss 322 is 1mm-2mm. It is understood that the heights of the first heat-insulating boss 321 and the second heat-insulating boss 322 can be set according to actual needs. They can be set to the same height or different heights, and no further limitations are imposed here.

[0051] See Figure 2 and Figure 4 In some embodiments, heat dissipation fins 33 are respectively installed on opposite sides of the motor rotor 21 of the motor 2 to dissipate heat from the motor rotor 21. Optionally, the heat dissipation fins 33 are made of aluminum alloy, but other materials can also be selected as long as they can achieve the heat dissipation function.

[0052] In some embodiments, a thermally conductive pad (not shown) is provided between the motor actuator 21 and the heat sink fins 33. Exemplarily, the thermally conductive pad is a thermally conductive silicone sheet or a graphite thermally conductive sheet.

[0053] In this way, by setting up thermal pads, the heat generated by the motor rotor 21 can be transferred to the heat dissipation fins 33, thereby further enhancing the heat dissipation effect of the motor 2.

[0054] In some embodiments, along the thickness direction of the heat dissipation guiding structure 323, the angle between the opposite sides of the heat dissipation guiding structure 323 and the center line of the motor mounting base 32 is 30°-60°. The center line extends along the length direction of the motor mounting base 32.

[0055] See Figure 3 and Figure 4 In some embodiments, the workbench mounting base 31 has a mounting positioning groove 311 on the side facing the motor mounting base 32, and the motor mounting base 32 is at least partially located within the mounting positioning groove 311. When installing the motor mounting base 32, it can be positioned directly through the mounting positioning groove 311, which facilitates quick alignment and installation. At the same time, the mounting positioning groove 311 can also restrict the position of the motor mounting base 32 in the width direction.

[0056] See Figure 2In some embodiments, the connecting device 3 further includes a first fastener 34 that passes through the worktable mounting base 31 and the motor mounting base 32 to connect the worktable and the worktable mounting base 31.

[0057] See Figure 2 In some embodiments, the connecting device 3 further includes a second fastener 35 that passes through the motor mount 32 and the motor mover 21 of the motor 2 to connect the motor mount 32 and the motor 2.

[0058] In this embodiment, there are 8 first fasteners 34 and 21 second fasteners 35. It is understood that the number of first fasteners 34 and second fasteners 35 can be set according to actual usage needs.

[0059] Optionally, both the first fastener 34 and the second fastener 35 are locking screws. The workbench mounting base 31, the motor mounting base 32, and the motor mover 21 are each provided with mounting holes to allow the locking screws to pass through for installation. Further, in this embodiment, the first heat-insulating boss 321 is located at the position corresponding to the mounting hole through which the first fastener 34 passes, and the second heat-insulating boss 322 is located at the position corresponding to the mounting hole through which the second fastener 35 passes.

[0060] It should be noted that the number of the first heat-insulating boss 321 and the first fastener 34 may be the same or different, and the number of the second heat-insulating boss 322 and the second fastener 35 may be the same or different.

[0061] It should be noted that, in this embodiment, the printer includes an X-axis worktable and an X-axis linear motor that drives the X-axis worktable to move, a Y-axis worktable and a Y-axis linear motor that drives the Y-axis worktable to move, and two connecting devices 3 are provided accordingly. One connecting device 3 is connected to the X-axis worktable and the X-axis linear motor, and the other is connected to the Y-axis worktable and the Y-axis linear motor.

[0062] See Figure 6 The present invention also provides a printer accuracy calibration method, applied to the printer of the above embodiments, the printer accuracy calibration method comprising:

[0063] S10. Obtain the temperature value X of motor 2 at set time intervals t. i For each temperature value X i Set a coefficient K i ;

[0064] S20. If multiple consecutive coefficients K i If the sum of these coefficients equals 1, then the above multiple coefficients K... i Corresponding to the corresponding temperature value X i After multiplying and adding them all together, we get the equivalent temperature D.

[0065] S30. Calculate the temperature fluctuation rate, which is equal to the difference between the current equivalent temperature D and the previous equivalent temperature D.

[0066] S40. If the temperature fluctuation rate exceeds the set threshold, control the printer to perform accuracy calibration.

[0067] It should be noted that, in this embodiment, starting from the start of motor 2, the temperature sensor acquires the temperature value X of motor 2 every set time interval t. i Multiple consecutive coefficients K i When the sum equals 1 for the first time, the temperature fluctuation rate is calculated based on the initial temperature D0 obtained when motor 2 just starts. After that, the temperature fluctuation rate is calculated based on the previous equivalent temperature D.

[0068] The calculation formula is:

[0069]

[0070]

[0071] Among them, X i K represents the temperature value of motor 2 obtained by the temperature sensor for the i-th time. i Let be the coefficient of the i-th iteration.

[0072] For example, the temperature sensor initially obtains the initial temperature D0 = 25.3℃ when motor 2 just starts, the threshold is set to 0.5℃, the set time t = 1min, K i The values ​​are all 0.1, n = 10, and the corresponding temperature values ​​are: X1 = 25℃, X2 = 25.2℃, X3 = 25.4℃, X4 = 25.6℃, X5 = 25.8℃, X6 = 26℃, X7 = 26.2℃, X8 = 26.5℃, X9 = 26.6℃, X... 10 =26.6℃, then the corresponding equivalent temperature is calculated as follows:

[0073] D=0.1*25+0.1*25.2+0.1*25.4+0.1*25.6+0.1*25.8+0.1*26+0.1*26.2+0.1*26.5+0.1*26.6+0.1*26.6=25.89℃

[0074] The temperature fluctuation difference is D-D0=25.89℃-25.3℃=0.59℃>0.5℃, so the printer needs to be calibrated for accuracy.

[0075] It should be noted that, taking the above example as an example, the next calculation of multiple continuous coefficients K i The sum needs to be calculated starting from i=11.

[0076] It is understandable that the coefficient K mentioned above... i The set time t and the set threshold can be set according to the actual situation. When the value of i is different, the corresponding coefficient K will be different. i They can be the same or different.

[0077] The printer accuracy calibration method described above uses a temperature sensor to acquire the temperature value of motor 2 at set time intervals, and calculates the weighting coefficient K according to the different temperature values. i The equivalent temperature of multiple temperature values ​​is calculated to obtain the difference between the current equivalent temperature and the previous equivalent temperature (or the initial temperature D0). The temperature change of motor 2 is judged based on the relationship between this difference and a set threshold. If the difference is greater than the set threshold, it indicates a large temperature change in motor 2, which will affect the printer's accuracy, requiring accuracy calibration. Compared to existing technologies that perform accuracy calibration at fixed intervals, if the interval is long (e.g., one hour), the printer's accuracy may be low due to large temperature changes in motor 2 during the uncalibrated period. If the interval is short (e.g., one minute), it will cause the printer to frequently start and stop for calibration, affecting printer operation and productivity. This invention sets a longer fixed interval and, within this interval, repeatedly acquires the temperature value of motor 2 using a temperature sensor, judges the temperature change of motor 2, and performs accuracy calibration.

[0078] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A printer, characterized in that, Includes a worktable, a motor (2), a controller, and a connecting device (3); The motor (2) is used to drive the worktable to move, and the controller is used to control the operation of the printer; A temperature sensor is installed on the motor (2), and the temperature sensor is connected in communication with the controller. The temperature sensor is used to collect the temperature information of the motor (2). The connecting device (3) includes a workbench mounting base (31) and a motor mounting base (32). The workbench is mounted on the workbench mounting base (31). The motor mounting base (32) is mounted on the side of the workbench mounting base (31) away from the workbench. The motor (2) is mounted on the side of the motor mounting base (32) away from the workbench mounting base (31). The motor mounting base (32) has a first heat-insulating boss (321) and a second heat-insulating boss (322) protruding on opposite sides, respectively. The first heat-insulating boss (321) is located between the workbench mounting base (31) and the motor mounting base (32), and the second heat-insulating boss (322) is located between the motor mounting base (32) and the motor (2). The opposite ends of the motor mounting base (32) are respectively constructed as heat dissipation and flow guiding structures (323), and the thickness of the heat dissipation and flow guiding structures (323) decreases in the direction away from the center of the motor mounting base (32).

2. The printer according to claim 1, characterized in that, Heat dissipation fins (33) are respectively installed on the opposite sides of the motor (2) actuator of the motor (2) for heat dissipation of the motor (2) actuator.

3. The printer according to claim 2, characterized in that, The heat dissipation fins (33) are made of aluminum alloy.

4. The printer according to claim 2, characterized in that, A thermal pad is provided between the motor (2) actuator and the heat dissipation fins (33).

5. The printer according to claim 4, characterized in that, The thermal pad is a thermally conductive silicone sheet or a graphite thermally conductive sheet.

6. The printer according to claim 1, characterized in that, Along the thickness direction of the heat dissipation guiding structure (323), the angle between the opposite two sides of the heat dissipation guiding structure (323) and the center line of the motor mounting base (32) is 30°-60°; wherein, the center line extends along the length direction of the motor mounting base (32).

7. The printer according to claim 1, characterized in that, The workbench mounting base (31) has a mounting positioning groove (311) on the side facing the motor mounting base (32), and the motor mounting base (32) is at least partially located in the mounting positioning groove (311).

8. The printer according to claim 1, characterized in that, The connecting device (3) further includes a first fastener (34) that passes through the worktable mounting base (31) and the motor mounting base (32) to connect the worktable and the worktable mounting base (31); and / or The connecting device (3) further includes a second fastener (35) that passes through the motor mounting base (32) and the motor (2) mover of the motor (2) to connect the motor mounting base (32) and the motor (2).

9. The printer according to claim 1, characterized in that, The height of the first heat-insulating boss (321) is 1mm-2mm; and / or the height of the second heat-insulating boss (322) is 1mm-2mm; and / or the material of the motor mounting base (32) is aluminum alloy.

10. A printer accuracy calibration method, characterized in that, Applied to the printer as described in any one of claims 1-9, the printer accuracy calibration method includes: Obtain the temperature value X of the motor (2) at set time intervals t. i For each of the aforementioned temperature values ​​X i Set a coefficient K i ; If multiple consecutive coefficients K i If the sum of these coefficients equals 1, then the aforementioned coefficients K... i Each with the corresponding temperature value X i After multiplying and adding them all together, we get the equivalent temperature D. Calculate the temperature fluctuation rate, which is equal to the difference between the current equivalent temperature D and the previous equivalent temperature D; If the temperature fluctuation rate exceeds a set threshold, the printer is controlled to perform accuracy calibration.

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