Encoder testing device

Abstract

The utility model relates to the technical field of encoder testing, in particular to an encoder testing device, which comprises a motor; the rotating main shaft is connected with the motor and is driven by the motor to rotate; one axial end of each rotary countershaft is used for driving the reference encoder to operate, and the other axial end of each rotary countershaft is used for driving the to-be-tested encoder to operate, so that the reference encoder and the to-be-tested encoders operate synchronously, and data of the reference encoder and data of the to-be-tested encoders are compared at the same time; and the transmission mechanism is used for enabling the rotating auxiliary shafts to be in transmission connection with the rotating main shaft, so that the rotating main shaft drives the rotating auxiliary shafts to synchronously rotate. According to the invention, multiple to-be-tested encoders of different types can be tested at a time, and the test efficiency can be improved.

Description

Technical Field

[0001] This application relates to the field of encoder testing technology, and specifically to an encoder testing device. Background Technology

[0002] Currently, when testing encoders, the encoder under test (DUT) needs to be installed at the rear output shaft of the motor. During testing, the DUT rotates to collect its output signal, allowing the system to determine if its performance meets requirements. After testing, the completed encoder is removed from the rear output shaft of the motor, and the next DUT is installed for testing. Care must be taken during removal and installation to avoid damaging the encoder and the rear output shaft of the motor.

[0003] Because only a single encoder can be tested at a time, there is a problem of low encoder testing efficiency. Summary of the Invention

[0004] This application provides an encoder testing device to improve encoder testing efficiency.

[0005] One embodiment provides an encoder testing apparatus, comprising:

[0006] Electric motor;

[0007] A rotating spindle is connected to the motor to rotate under the drive of the motor;

[0008] At least two rotary sub-shafts, one end of which is used to drive a reference encoder to run, and the other end of which is used to drive an encoder under test to run, so that the reference encoder and the encoder under test run synchronously;

[0009] And a transmission mechanism, which is used to drive each of the rotary sub-shafts to the rotary main shaft so that the rotary main shaft drives each of the rotary sub-shafts to rotate synchronously.

[0010] In one embodiment, the encoder testing device further includes a mounting bracket, and the rotary sub-shaft is detachably mounted on the mounting bracket;

[0011] The mounting bracket is detachably provided with a first mounting cover and a second mounting cover. The first mounting cover is used to mount the encoder under test, and the second mounting cover is used to mount the reference encoder.

[0012] In one embodiment, the transmission mechanism is a belt drive mechanism, which includes a driven pulley detachably mounted on the rotary sub-shaft.

[0013] In one embodiment, two detachable limiting members are spaced apart on the rotary joint shaft, and the driven wheel is disposed between the two limiting members. The limiting members are used to restrict the axial displacement of the driven wheel along the rotary joint shaft.

[0014] In one embodiment, the encoder testing device includes a mounting base, and the rotating spindle and the encoder mounting components are both disposed on the mounting base;

[0015] A position adjustment structure is provided between the mounting bracket and the mounting base to adjust the position of the mounting bracket, thereby changing the distance between the rotary sub-shaft and the rotary main shaft, and thus tensioning the transmission belt in the belt drive mechanism.

[0016] In one embodiment, the position adjustment structure includes a positioning bolt, the mounting bracket has a through groove along the interval direction between the rotary sub-shaft and the rotary main shaft, the mounting base has a positioning screw hole, and the shank of the positioning bolt passes through the through groove and is threaded into the positioning screw hole, so that the head of the positioning bolt presses and fixes the mounting bracket on the mounting base.

[0017] In one embodiment, the positioning screw holes are arranged in a row along the axial direction of the through groove so that the positioning bolts can be selectively connected.

[0018] In one embodiment, the position adjustment structure further includes a fixing member and an adjusting rod. The fixing member is located on the side of the mounting bracket that is close to or away from the rotating main shaft. The adjusting rod is connected to the fixing member along the interval direction between the rotating secondary shaft and the rotating main shaft. The adjusting rod rotates to move the mounting bracket closer to or away from the rotating main shaft.

[0019] In one embodiment, a first guide structure is provided between the mounting base and the mounting bracket to provide guidance for adjusting the position of the mounting bracket;

[0020] And / or, the encoder testing device further includes at least two spindle supports for mounting the rotating spindle, at least one of the spindle supports being adjustablely positioned on the mounting base along the axial direction of the rotating spindle, and a second guide structure being provided between the mounting base and the spindle supports to provide guidance for adjusting the position of the spindle supports.

[0021] In one embodiment, each of the rotary sub-shafts is arranged side by side along a direction parallel to the rotary main shaft.

[0022] According to the encoder testing device of the above embodiment, by setting a rotating main shaft and at least two rotating secondary shafts and a transmission mechanism, when the motor drives the rotating main shaft to rotate, it can drive each rotating secondary shaft to rotate synchronously. This allows the rotating secondary shafts to drive the encoder under test and the reference encoder to run synchronously, so as to compare the operating data of the encoder under test and the reference encoder at the same time. This enables the testing of multiple different types of encoders under test in a single run, which helps to improve testing efficiency. Moreover, since each encoder under test and its corresponding reference encoder are driven by the same rotating secondary shaft, the test can be performed by comparing with the reference encoder. The testing processes of each encoder under test are independent and do not affect each other. This makes it difficult for differences in the transmission accuracy of the transmission mechanism to affect the test results, which helps to ensure the accuracy of the test results. Attached Figure Description

[0023] Figure 1 A schematic diagram of the encoder testing device according to one embodiment (I);

[0024] Figure 2 This is a schematic diagram of the encoder mounting component in one embodiment;

[0025] Figure 3 This is an exploded structural diagram of the encoder mounting component in one embodiment;

[0026] Figure 4 This is an exploded structural diagram of the rotary sub-shaft portion in one embodiment;

[0027] Figure 5 This is a top view of an encoder testing apparatus according to one embodiment;

[0028] Figure 6 This is a schematic diagram (II) of the encoder testing device according to one embodiment.

[0029] In the diagram, 100 represents the motor; 110 represents the motor bracket.

[0030] 200. Rotary spindle; 210. Coupling; 220. Spindle support; 221. Second positioning groove;

[0031] 300. Encoder mounting component; 310. Mounting bracket; 311. Mounting base; 3111. Through groove; 3112. First positioning groove; 312. Sub-shaft bearing seat; 3121. Sub-shaft bearing; 313. Positioning bolt; 320. Rotary sub-shaft; 321. Limiting component; 3211. Ear hole; 322. Annular groove; 330. First mounting cover plate; 340. Second mounting cover plate;

[0032] 400. Transmission mechanism; 410. Driving pulley; 420. Driven pulley; 430. Transmission belt;

[0033] 500, Mounting base; 510, Positioning screw hole; 520, First guide groove; 521, First guide rail; 530, Fixing component; 531, Adjusting rod; 540, Second guide groove; 541, Second guide rail;

[0034] 600. Encoder under test;

[0035] 700, Reference encoder. Detailed Implementation

[0036] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0037] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0038] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0039] In this embodiment, by setting a rotating main shaft 200 driven by a motor 100 and at least two rotating secondary shafts 320, each rotating secondary shaft 320 can simultaneously drive the encoder under test 600 and the reference encoder 700 to run for comparative testing. By using the transmission mechanism 400 to make the rotating main shaft 200 drive each rotating secondary shaft 320 to rotate simultaneously, it is possible to test multiple different types of encoders under test 600 at the same time, which helps to improve testing efficiency.

[0040] One embodiment provides an encoder testing device, please refer to... Figures 1 to 6The encoder testing device includes a motor 100, a rotating spindle 200, an encoder mounting component 300, and a transmission mechanism 400.

[0041] Please refer to the following: Figure 1 The motor 100 has an output shaft for outputting rotary motion, thereby providing power for encoder testing. The motor 100 can be a servo motor, which helps ensure stable and controllable rotational speed. The rotary spindle 200 can be drivenly connected to the output shaft of the motor 100. For example, the output shaft of the motor 100 and the rotary spindle 200 are connected by a coupling 210, so that the rotary spindle 200 can rotate under the drive of the output shaft of the motor 100.

[0042] Please refer to Figure 1 and Figure 2 The encoder mounting component 300 can be equipped with at least two components as needed for testing. Figure 1 The example shown uses three encoder mounting components 300. Each encoder mounting component 300 includes a rotatable rotary sub-shaft 320. One end of the rotary sub-shaft 320 along the axial direction drives a reference encoder 700, and the other end drives the encoder under test 600, enabling synchronous operation of the reference encoder 700 and the encoder under test 600. This allows for simultaneous comparison of the operating data of the encoder under test 600 and the reference encoder 700, thus enabling the testing of the encoder under test 600.

[0043] Please refer to Figure 1 The transmission mechanism 400 is used to connect each rotary sub-shaft 320 to the rotary main shaft 200, enabling the rotary main shaft 200 to simultaneously drive each rotary sub-shaft 320 to rotate synchronously. This allows for the testing of multiple encoders 600 of the same or different types in a single test, improving testing efficiency. Furthermore, the test results for each encoder 600 are obtained by comparing its operating data with the corresponding reference encoder 700. The testing processes are independent and do not affect each other, making it difficult for differences in the transmission accuracy of the transmission mechanism 400 to influence the test results, thus ensuring accuracy. In addition, avoiding direct mounting of the encoder 600 to the output shaft of the motor 100 reduces the risk of damage to the motor 100's output shaft. If the rotary sub-shaft 320 is damaged, only the rotary sub-shaft 320 needs to be replaced, reducing maintenance costs.

[0044] In one embodiment, please refer to Figure 1 The encoder testing device also includes a mounting base 500, a rotating main shaft 200 and a rotating secondary shaft 320, all of which are mounted on the mounting base 500. The motor 100 can also be mounted on the mounting base 500.

[0045] In some embodiments, the mounting base 500 may be rectangular in shape with both length and width directions. The motor 100 and the main rotating shaft 200 may be located on one side of the mounting base 500 along the width direction, and each of the secondary rotating shafts 320 may be located on the other side of the mounting base 500 along the width direction, and arranged side by side in a direction parallel to the axial direction of the main rotating shaft 200.

[0046] For example, the rotating spindle 200 is arranged along the length of the mounting base 500, and the motor 100 is arranged at one end of the rotating spindle 200 along the axial direction. The encoder testing device may include a motor bracket 110 arranged on the mounting base 500, and the motor 100 is mounted on the motor bracket 110; it may also include at least two spindle brackets 220 arranged on the mounting base 500, and the rotating spindle 200 is mounted on the spindle bracket 220. The spindle bracket 220 may be provided with a spindle bearing so that the rotating spindle 200 is rotatably arranged on the spindle bracket 220.

[0047] In one embodiment, please refer to Figure 1 and Figure 2 The encoder testing device may include an encoder mounting component 300, which includes a mounting bracket 310. A rotary sub-shaft 320 is detachably mounted on the mounting bracket 310 for replacement in case of damage. It is understood that one or more mounting brackets 310 may be provided; when one mounting bracket 310 is provided, all rotary sub-shafts 320 are connected to that mounting bracket 310; when multiple mounting brackets 310 are provided, each rotary sub-shaft 320 may be individually or partially mounted on the same mounting bracket 310.

[0048] For example, at least two mounting brackets 310 are provided corresponding to the rotary sub-shafts 320. The mounting brackets 310 may include a mounting base 311 and two sub-shaft bearing seats 312. The mounting base 311 is used to connect with the mounting base 500. The two sub-shaft bearing seats 312 are spaced apart on the mounting base 311 in a direction parallel to the axial direction of the rotary main shaft 200. Sub-shaft bearings 3121 are provided on the two sub-shaft bearing seats 312. The rotary sub-shaft 320 is detachably installed within the two sub-shaft bearings 3121, and the end of the rotary sub-shaft 320 can protrude from the sub-shaft bearing seats 312 to drive the encoder under test 600 and the reference encoder 700. In one embodiment, please refer to... Figure 2 The mounting bracket 310 is detachably provided with a first mounting cover 330 and a second mounting cover 340. The first mounting cover 330 is used to mount the encoder under test 600, and the second mounting cover 340 is used to mount the reference encoder 700.

[0049] For example, the first mounting cover plate 330 and the second mounting cover plate 340 are detachably disposed on both sides of the mounting bracket 310 along the axial direction of the rotary sub-shaft 320. They can be respectively mounted on the opposite sides of the two sub-shaft bearing seats 312, so that the encoder mounted on the first mounting cover plate 330 and the second mounting cover plate 340 can be driven by the rotary sub-shaft 320.

[0050] During testing, the first mounting cover 330 and / or the second mounting cover 340 can be replaced to adapt to different models of the encoder under test 600 and the reference encoder 700, which helps to improve the applicability of the encoder testing device.

[0051] In other embodiments, the first mounting cover 330 and the second mounting cover 340 can also be replaced by non-removable mounting structures such as encoder mounting holes or encoder mounting slots provided on the mounting bracket 310. By providing a variety of encoder mounting holes or encoder mounting slots, the installation needs of different types of encoders can also be adapted.

[0052] In one embodiment, please refer to Figure 1 The transmission mechanism 400 is configured as a belt drive mechanism, such as a synchronous belt drive mechanism, to improve transmission accuracy. The belt drive mechanism includes a driving pulley 410, a driven pulley 420, and a transmission belt 430. The driving pulley 410 is mounted on the rotating main shaft 200; the driven pulley 420 is detachably mounted on the rotating secondary shaft 320 so that it can be removed from the secondary shaft 320 when it is disassembled or replaced, avoiding interference with the disassembly of the secondary shaft 320; the transmission belt 430 is fitted onto both the driving pulley 410 and the driven pulley 420. It is understood that the specific configuration of the transmission mechanism 400 is not limited; for example, it can also be a gear drive or other transmission structure that can meet the transmission requirements.

[0053] In some embodiments, please refer to Figure 4 Two detachable limiting members 321 can be provided at intervals on the rotary sub-shaft 320. The driven wheel 420 is disposed between the two limiting members 321. The limiting members 321 are used to limit the axial displacement of the driven wheel 420 along the rotary sub-shaft 320, which helps to prevent the driven wheel 420 from deflecting during use.

[0054] For example, the rotary sub-shaft 320 has two annular grooves 322 spaced apart, and the driven wheel 420 is disposed between the two annular grooves 322. The limiting member 321 is annular in shape with a notch, and the limiting member 321 is elastic so that it can be engaged with the annular groove 322 through the notch. Furthermore, the limiting member 321 may have ear portions on both sides of the notch, and the ear portions are provided with ear holes 3211. After the limiting member 321 is engaged with the annular groove 322, a strap can be passed through the two ear holes 3211 to close the notch, so that the limiting member 321 and the annular groove 322 fit securely and help reduce the risk of the limiting member 321 detaching and abnormal noise.

[0055] Those skilled in the art will understand that, in order to ensure the transmission effect of the belt drive mechanism during use, the drive belt 430 needs to be kept at a suitable tension. Therefore, in a further embodiment, please refer to... Figure 5 and Figure 6 A position adjustment structure can be provided between the mounting bracket 310 and the mounting base 500 to adjust the position of the mounting bracket 310, thereby changing the distance between the rotary sub-shaft 320 and the rotary main shaft 200, and thus tensioning the transmission belt 430 in the belt drive mechanism.

[0056] In one embodiment, please refer to Figure 5 The position adjustment structure includes a positioning bolt 313. A through groove 3111 is provided on the mounting bracket 310 along the interval direction between the rotating sub-shaft 320 and the rotating main shaft 200. A positioning screw hole 510 is provided on the mounting base 500. The shank of the positioning bolt 313 passes through the through groove 3111 and is threaded into the positioning screw hole 510, so that the head of the positioning bolt 313 presses and fixes the mounting bracket 310 onto the mounting base 500. During tension adjustment, the positioning bolt 313 can be loosened, and then the mounting bracket 310 can be moved to tension the transmission belt 430. Then, the positioning bolt 313 can be tightened again to re-fix the mounting bracket 310. Two sets of the aforementioned positioning bolt 313, through groove 3111, and positioning screw hole 510 can be provided on both sides of the mounting bracket 310 to improve the fixing effect.

[0057] To improve the adjustment range of the mounting bracket 310 position and ensure tensioning effect, in a further embodiment, the positioning screw holes 510 can be arranged in a row along the axial direction of the through groove 3111 for selective connection of the positioning bolts 313.

[0058] To prevent the mounting bracket 310 from tilting during movement, in one embodiment, please refer to... Figure 6 A first guide structure may be provided between the mounting base 500 and the mounting bracket 310 to provide guidance for adjusting the position of the mounting bracket 310. The form of the first guide structure is not limited, as long as it can be used to limit the adjustment direction of the mounting bracket 310.

[0059] For example, the first guide structure may include a first guide groove 520 disposed on the surface of the mounting base 500. The first guide groove 520 may be disposed in a direction perpendicular to the axis of the rotating spindle 200. The mounting base 311 is provided with a first positioning groove 3112 opposite to the first guide groove 520. A first guide rail 521 may be provided between the first guide groove 520 and the first positioning groove 3112 to limit and guide the movement of the mounting bracket 310, so that the mounting bracket 310 can only move along the length direction of the first guide groove 520.

[0060] In one embodiment, please refer to Figure 5 The position adjustment structure also includes a fixing member 530 and an adjusting rod 531. The fixing member 530 is located on the side of the mounting bracket 310 that is close to or away from the rotating main shaft 200. The adjusting rod 531 is connected to the fixing member 530 along the interval direction between the rotating secondary shaft 320 and the rotating main shaft 200. The adjusting rod 531 drives the mounting bracket 310 to move closer to or away from the rotating main shaft 200 by rotation.

[0061] For example, the fixing member 530 is fixed to the mounting base 500 by bolts and is located on the side of the mounting bracket 310 opposite to the rotating main shaft 200. The fixing member 530 has a threaded through hole along the adjustment direction of the mounting bracket 310, and the adjusting rod 531 has a threaded section, so that the adjusting rod 531 is threadedly connected to the fixing member 530 through the mating of the threaded section and the threaded through hole. The adjusting rod 531 has a connecting end that extends out of the threaded through hole, and the connecting end is rotatably connected to the mounting base 311 of the mounting bracket 310, so that by rotating the adjusting rod 531, the mounting bracket 310 can be moved axially along the adjusting rod 531.

[0062] When in use, the adjusting rod 531 can be rotated first to pull the mounting bracket 310 to a suitable position so that the transmission belt 430 is tensioned. Then the positioning bolt 313 is tightened to prevent the transmission belt 430 from driving the mounting bracket 310 to reset when it is working.

[0063] It is understandable that, in practical applications, the number of encoder mounting components 300 may be adjusted or the rotating spindle 200 of different lengths may be replaced as needed. Therefore, the spindle bracket 220 can also be adjusted on the mounting base 500 to meet the adjustment needs of the rotating spindle 200.

[0064] In one embodiment, please refer to Figure 6 At least one of the spindle supports 220 is axially position-adjustable on the mounting base 500 along the rotating spindle 200. A second guide structure is provided between the mounting base 500 and the spindle support 220 to provide guidance for adjusting the position of the spindle support 220.

[0065] For example, the second guide structure includes a second guide groove 540 disposed on the mounting base 500 along the axial direction of the rotating spindle 200. Both spindle supports 220 are provided with second positioning grooves 221 opposite to the second mounting groove. A second guide rail 541 may be provided between the second guide groove 540 and the second positioning groove 221 to limit and guide the movement of the spindle support 220. This helps to maintain the concentricity of the spindle bearings on the spindle support 220 after the position of the spindle support 220 is adjusted, thereby keeping the axial direction of the rotating spindle 200 unchanged.

[0066] In some embodiments, the motor bracket 110 may also be adjustablely mounted on the mounting base 500. The guide structure of the motor bracket 110 may be set with reference to the second guide structure described above, and will not be repeated here.

[0067] In one embodiment, the encoder testing device may further include a data acquisition system, which is electrically connected to each encoder under test 600 and a reference encoder 700 to record and compare the data of each encoder under test 600 and the corresponding reference encoder 700 in real time, so as to facilitate users to quickly identify performance differences between encoders and potential problems of encoders under test 600.

[0068] In one embodiment, the encoder testing device further includes an emergency stop button and / or an overload protection unit electrically connected to the motor 100; the emergency stop button is triggered by the operator in an emergency such as when the device malfunctions, to control the motor 100 to stop; the overload protection unit is used to monitor the operating status of the motor 100 to identify the occurrence of an overload in the motor 100, and can control the motor 100 to stop when an overload is detected, thereby protecting the motor 100.

[0069] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.

Claims

1. An encoder test apparatus, characterized by, The encoder testing device comprises: a motor; a rotating main shaft connected with the motor to rotate under the driving of the motor; at least two rotating auxiliary shafts, one end of each rotating auxiliary shaft is used to drive a reference encoder to operate, and the other end is used to drive a to-be-tested encoder to operate, so that the reference encoder and the to-be-tested encoder operate synchronously; and a transmission mechanism for driving each rotating auxiliary shaft to rotate synchronously under the driving of the rotating main shaft.

2. The encoder test apparatus of claim 1, wherein, The encoder testing device further comprises a mounting bracket, and the rotating auxiliary shafts are detachably arranged on the mounting bracket. The mounting bracket is detachably provided with a first mounting cover plate and a second mounting cover plate, the first mounting cover plate is used to mount the to-be-tested encoder, and the second mounting cover plate is used to mount the reference encoder.

3. The encoder test apparatus of claim 2, wherein, The transmission mechanism is a belt transmission mechanism, and the belt transmission mechanism comprises a driven wheel detachably arranged on the rotating auxiliary shaft.

4. The encoder test apparatus of claim 3, wherein, Two detachable limiting members are arranged on the rotating auxiliary shaft in a spaced manner, and the driven wheel is arranged between the two limiting members, and the limiting members are used to limit the axial displacement of the driven wheel along the rotating auxiliary shaft.

5. The encoder test apparatus of claim 3, wherein, The encoder testing device comprises a mounting seat, and the rotating main shaft and the encoder mounting component are arranged on the mounting seat. A position adjusting structure is arranged between the mounting bracket and the mounting seat, and is used to adjust the position of the mounting bracket to change the distance between the rotating auxiliary shaft and the rotating main shaft, so as to tension the transmission belt in the belt transmission mechanism.

6. The encoder test apparatus of claim 5, wherein, The position adjusting structure comprises a positioning bolt, a through slot is arranged on the mounting bracket in a direction in which the rotating auxiliary shaft and the rotating main shaft are spaced apart, the mounting seat is provided with a positioning screw hole, and the rod portion of the positioning bolt is threadedly connected to the positioning screw hole through the through slot, so that the head portion of the positioning bolt presses and fixes the mounting bracket on the mounting seat.

7. The encoder test apparatus of claim 6, wherein, The positioning screw holes are arranged in an array along the axial direction of the through slot to be selectively connected by the positioning bolt.

8. The encoder test apparatus of claim 6, wherein, The position adjusting structure further comprises a fixing member and an adjusting rod, the fixing member is located on the side of the mounting bracket close to or away from the rotating main shaft, the adjusting rod is connected to the fixing member in the direction in which the rotating auxiliary shaft and the rotating main shaft are spaced apart, and the adjusting rod drives the mounting bracket to move close to or away from the rotating main shaft by rotating.

9. The encoder test apparatus of claim 6, wherein, A first guide structure is arranged between the mounting seat and the mounting bracket to guide the adjustment of the position of the mounting bracket. And / or, the encoder testing device further comprises at least two main shaft supports, the main shaft supports are used to mount the rotating main shaft, at least one of the main shaft supports is arranged on the mounting seat in an adjustable manner along the axial direction of the rotating main shaft, and a second guide structure is arranged between the mounting seat and the main shaft support to guide the adjustment of the position of the main shaft support.

10. The encoder test apparatus of any of claims 1 to 9, wherein, Each rotating auxiliary shaft is arranged in parallel to the rotating main shaft.

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