A high-speed X-ray inspection machine with dual-drive collaborative control

Abstract

This utility model discloses a high-speed X-ray inspection machine with dual-drive collaborative control, including a signal receiving device, a signal transmitting device arranged above the signal receiving device, and a product transmission line arranged between the signal receiving device and the signal transmitting device. The product transmission line includes two bases, a first transmission frame, a second transmission frame, a fixed frame, a translation drive mechanism, and a transmission drive mechanism. The two bases are arranged parallel and spaced apart, and each base has a straight slide rail arranged along its length on its top. This utility model, by employing a dual-motor drive, can provide stronger power, achieve faster scanning speed and inspection efficiency, and meet the rapid inspection needs in high-speed production lines, demonstrating strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of X-ray inspection technology, and in particular to a high-speed X-ray inspection machine with dual-drive collaborative control. Background Technology

[0002] In the electronics manufacturing industry, X-ray inspection machines are widely used for non-destructive testing of electronic products to ensure product quality. However, the single-drive X-ray inspection machines commonly used in the market have many defects and shortcomings: single-drive configurations rely on only a single power source, resulting in limited power output that cannot meet the demands of high-speed inspection. Furthermore, during high-speed operation or prolonged work, the single-drive structure has weak vibration resistance, making it highly susceptible to inaccurate test results due to equipment shaking. In addition, if the single power source fails, the equipment cannot operate normally, with a failure rate significantly higher than dual-drive equipment, severely impacting production continuity. Utility Model Content

[0003] The purpose of this invention is to provide a high-speed X-ray inspection machine with dual-drive collaborative control. By adopting a dual-motor drive, it can provide stronger power, achieve faster scanning speed and inspection efficiency, meet the rapid inspection needs in high-speed production lines, and has strong practicality.

[0004] To achieve the above objectives, the following technical solution is adopted:

[0005] A high-speed X-ray inspection machine with dual-drive collaborative control includes a signal receiving device, a signal transmitting device arranged above the signal receiving device, and a product transmission line arranged between the signal receiving device and the signal transmitting device. The product transmission line includes two bases, a first transmission frame, a second transmission frame, a fixed frame, a translation drive mechanism, and a transmission drive mechanism. The two bases are arranged parallel and spaced apart, and each base has a straight slide rail arranged along its length on its top. One end of the first transmission frame is fixedly connected to one end of a base, and the bottom ends of the second transmission frame are slidably connected to the straight slide rails. A transmission belt module for transmitting products is also installed on the opposite side of both the first and second transmission frames. One end of the fixed frame is fixedly connected to the other end of a base, and the transmission drive mechanism is mounted on the fixed frame. The transmission drive mechanism is also connected to the transmission belt module and is used to drive the transmission belt module to rotate. The translation drive mechanism is mounted on the fixed frame and connected to the second transmission frame, and is used to drive the second transmission frame to move closer to or away from the first transmission frame.

[0006] Furthermore, the conveyor belt module includes several synchronous pulleys and a synchronous belt wound around the synchronous pulleys; the transmission drive mechanism includes a transmission motor mounted on a fixed frame, a first coupling connected to the output shaft of the transmission motor, and a drive shaft rotatably connected between the first transmission frame and the second transmission frame; one end of the drive shaft also passes through the second transmission frame, and the first coupling is connected to the end of the drive shaft passing through the second transmission frame; two drive pulleys are also mounted on the drive shaft, and the synchronous belts arranged on the first and second transmission frames are respectively wound around one drive pulley.

[0007] Furthermore, the translation drive mechanism includes a translation drive motor and two ball screws; the translation drive motor is mounted on a fixed frame, and the output shaft of the translation drive motor is also driven and connected to a second coupling; the two ball screws are arranged in parallel and spaced apart between the first transmission frame and the second transmission frame, and one end of each ball screw is rotatably connected to one side of the first transmission frame; each ball screw is also equipped with a ball nut, and the second transmission frame is connected to the two ball nuts; the other end of each ball screw passes through the second transmission frame, and one end of the ball screw passing through the second transmission frame is also connected to the second coupling; a drive wheel is also installed on the end of each ball screw passing through the second transmission frame, and a drive belt is wound between the two drive wheels.

[0008] Furthermore, a sensing plate is installed on the second transmission frame, and a U-shaped photoelectric sensor that works in conjunction with the sensing plate is also installed on the base.

[0009] Furthermore, a cover plate is installed on the top of both the first and second transmission racks, and one side of the cover plate extends to the side above the synchronous belt.

[0010] Furthermore, both the first and second transmission frames are equipped with blocking mechanisms.

[0011] Furthermore, the blocking mechanism includes a fixed base, a blocking cylinder mounted on the fixed base, and a blocking plate connected to the blocking cylinder; one end of the blocking plate extends movably through the cover plate and extends toward the synchronous belt.

[0012] Furthermore, the signal receiving device includes two first X-axis translation mechanisms, a first X-axis translation frame, a first Y-axis translation mechanism, a first Y-axis translation plate, a first Z-axis lifting mechanism, a first Z-axis lifting seat, and a flat panel detector; the two first X-axis translation mechanisms are arranged in parallel and spaced apart, and the bottom ends of the first X-axis translation frame are respectively connected to one of the first X-axis translation mechanisms; the top of the first X-axis translation frame is also connected to a first connecting vertical plate, and the first Y-axis translation mechanism is installed on one side of the first connecting vertical plate; the first Y-axis translation plate is connected to the first Y-axis translation mechanism, and the first Z-axis lifting mechanism is installed on one side of the first Y-axis translation plate; the first Z-axis lifting seat is connected to the first Z-axis lifting mechanism, and the flat panel detector is installed on the first Z-axis lifting seat.

[0013] Furthermore, the signal transmitting device includes two second X-axis translation mechanisms, a second X-axis translation frame, a second Y-axis translation mechanism, a second Y-axis translation plate, a second Z-axis lifting mechanism, a second Z-axis lifting seat, and an optical tube; the two second X-axis translation mechanisms are arranged in parallel and spaced apart, and the bottom ends of the second X-axis translation frame are respectively connected to one of the second X-axis translation mechanisms; the top of the second X-axis translation frame is also connected to a second connecting vertical plate, and the second Y-axis translation mechanism is installed on one side of the second connecting vertical plate; the second Y-axis translation plate is connected to the second Y-axis translation mechanism, and the second Z-axis lifting mechanism is installed on one side of the second Y-axis translation plate; the second Z-axis lifting seat is connected to the second Z-axis lifting mechanism, and the optical tube is installed inside the second Z-axis lifting seat; a transmission port is also provided at the bottom of the second Z-axis lifting seat corresponding to the optical tube, and a protective cover is also installed at the transmission port.

[0014] Furthermore, an industrial camera and a ring light source arranged below the industrial camera are also installed on one side of the second Z-axis lifting platform.

[0015] By adopting the above solution, the beneficial effects of this utility model are:

[0016] 1) By adopting a dual-motor drive, stronger power can be provided, achieving faster scanning speed and detection efficiency, which can meet the rapid detection needs in high-speed production lines; at the same time, the dual-drive system can precisely coordinate the control of the movement of the light tube and flat panel detector, achieving higher positioning accuracy and repeatability, making the detection of small defects more accurate, and the dual-drive structure gives the equipment better stability, effectively reducing vibration and shaking during high-speed movement and long-term operation, ensuring accurate and reliable detection results;

[0017] 2) The two drive units of the dual-drive system can back each other up. When one drive unit fails, the other drive unit can still maintain the basic operation of the equipment, reducing the failure rate by half, improving the reliability and stability of the equipment, and ensuring production progress. At the same time, with the innovative architecture of dual-drive synergy, the equipment achieves a leapfrog improvement in scanning speed and detection efficiency. Compared with traditional single-drive models, the detection speed is directly doubled, which can seamlessly connect with the high-efficiency production rhythm of the production line, perfectly solving the bottleneck problem of production line detection efficiency, and ensuring a dual upgrade of production efficiency and quality control with ultra-fast response capability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the product transmission line of this utility model;

[0020] Figure 3 This is a schematic diagram of the signal transmitting device of this utility model;

[0021] Figure 4 This is a schematic diagram of the signal receiving device of this utility model;

[0022] The following are explanations of the labels in the attached diagram:

[0023] 1. Signal receiving device; 2. Signal transmitting device; 3. Product transmission line; 11. First X-axis translation mechanism; 12. First Y-axis translation mechanism; 13. First Z-axis lifting mechanism; 14. First Z-axis lifting seat; 15. Flat panel detector; 16. First connecting vertical plate; 21. Second X-axis translation mechanism; 22. Second Y-axis translation mechanism; 23. Second Z-axis lifting mechanism; 24. Second Z-axis lifting seat; 25. Second connecting vertical plate; 26. Protective cover; 27. Industrial camera; 28. Ring light source; 31. 32. Base; 33. First transmission frame; 34. Second transmission frame; 35. Fixed frame; 36. Translation drive mechanism; 37. Transmission drive mechanism; 38. Linear slide rail; 39. Transmission belt module; 321. Cover plate; 322. Blocking mechanism; 351. Translation drive motor; 352. Ball screw; 353. Second coupling; 354. Ball nut; 355. Sensing plate; 356. U-shaped photoelectric sensor; 361. Transmission motor; 362. First coupling; 363. Drive shaft; 364. Drive wheel. Detailed Implementation

[0024] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Reference Figures 1 to 4As shown, this utility model provides a high-speed X-ray inspection machine with dual-drive cooperative control. In one embodiment, it includes a signal receiving device 1, a signal transmitting device 2 arranged above the signal receiving device 1, and a product transmission line 3 arranged between the signal receiving device 1 and the signal transmitting device 2. The product transmission line 3 includes two bases 31, a first transmission frame 32, a second transmission frame 33, a fixing frame 34, a translation drive mechanism 35, and a transmission drive mechanism 36. The two bases 31 are arranged in parallel and spaced apart, and each base 31 has a straight slide rail 37 arranged on its top along its length. One end of the first transmission frame 32 is fixedly connected to one end of one base 31. Next, the bottom ends of the second transmission frame 33 are slidably connected to a straight slide rail 37; a transmission belt module 38 for transporting products is also installed on the opposite side of the first transmission frame 32 and the second transmission frame 33; one end of the fixed frame 34 is fixedly connected to the other end of a base 31, and the transmission drive mechanism 36 is installed on the fixed frame 34; the transmission drive mechanism 36 is also connected to the transmission belt module 38, and the transmission drive mechanism 36 is used to drive the transmission belt module 38 to rotate; the translation drive mechanism 35 is installed on the fixed frame 34 and connected to the second transmission frame 33, and the translation drive mechanism 35 is used to drive the second transmission frame 33 to move closer to or away from the first transmission frame 32.

[0026] In this embodiment, the testing machine also includes a chassis, in which the signal receiving device 1, the signal transmitting device 2, and the product transmission line 3 are all arranged. The front of the chassis has a cabinet door connected to the chassis via a hinge, and the cabinet door is equipped with a display, function buttons (emergency stop switch, key switch, etc.), mouse and keyboard, door handle, and observation window. An LED strip is also installed on the upper part of the front of the chassis, and a foot cup is also installed on the bottom of the chassis. A three-color indicator light is installed on the top of the chassis, and a grating and exhaust fan are also installed at one end of the chassis.

[0027] In this embodiment, a translation drive mechanism 35 is provided, which can drive the second transmission frame 33 to move closer to or further away from the first transmission frame 32 to adjust the distance between them, thereby adapting to the transmission of products of different sizes and specifications, and has strong versatility. During operation, the scanning parameters (voltage, current, movement speed) are first set. Then, the product flows from the upstream end to the transmission belt module 38. The transmission frame is equipped with a sensor. After the product is detected, the transmission belt module 38 transmits the product to the detection position. Then, the signal receiving device 1 and the signal transmitting device 2 move in the X / Y directions according to the preset trajectory to quickly scan the product. The signal receiving device 1 synchronously collects X-ray projection data. The background then reconstructs the two-dimensional image in real time, automatically marks defects, and generates a detection report. After the detection is completed, the transmission belt module 38 transmits the product to the next transmission line.

[0028] In this embodiment, the signal receiving device 1 includes two first X-axis translation mechanisms 11, a first X-axis translation frame, a first Y-axis translation mechanism 12, a first Y-axis translation plate, a first Z-axis lifting mechanism 13, a first Z-axis lifting seat 14, and a flat panel detector 15. The two first X-axis translation mechanisms 11 are arranged in parallel and spaced apart. The bottom ends of the first X-axis translation frame are respectively connected to one of the first X-axis translation mechanisms 11. The top of the first X-axis translation frame is also connected to a first connecting vertical plate 16. The first Y-axis translation mechanism 12 is installed on one side of the first connecting vertical plate 16. The first Y-axis translation plate is connected to the first Y-axis translation mechanism 12, and the first Z-axis lifting mechanism 13 is installed on one side of the first Y-axis translation plate. The first Z-axis lifting seat 14 is connected to the first Z-axis lifting mechanism 13, and the flat panel detector 15 is installed on the first Z-axis lifting seat 14.

[0029] The signal transmitting device 2 includes two second X-axis translation mechanisms 21, a second X-axis translation frame, a second Y-axis translation mechanism 22, a second Y-axis translation plate, a second Z-axis lifting mechanism 23, a second Z-axis lifting seat 24, and an optical tube; the two second X-axis translation mechanisms 21 are arranged in parallel and spaced apart, and the bottom ends of the second X-axis translation frame are respectively connected to one of the second X-axis translation mechanisms 21; the top of the second X-axis translation frame is also connected to a second connecting vertical plate 25, and the second Y-axis translation mechanism 22 is installed on one side of the second connecting vertical plate 25; the second Y... The Y-axis translation plate is connected to the second Y-axis translation mechanism 22, and the second Z-axis lifting mechanism 23 is installed on one side of the second Y-axis translation plate; the second Z-axis lifting seat 24 is connected to the second Z-axis lifting mechanism 23, and the optical tube is installed inside the second Z-axis lifting seat 24; the bottom of the second Z-axis lifting seat 24 is also provided with an emission port corresponding to the optical tube, and a protective cover 26 is also installed at the emission port (to prevent X-ray leakage); an industrial camera 27 and a ring light source 28 arranged below the industrial camera 27 are also installed on one side of the second Z-axis lifting seat 24.

[0030] The aforementioned translation mechanism and Z-axis lifting mechanism can directly adopt linear modules, without limitation. In this embodiment, both the signal receiving device 1 and the signal transmitting device 2 have two sets of X-axis drive power. By adopting a dual-drive approach, stronger power can be provided, achieving faster scanning speed and detection efficiency, which can meet the rapid detection requirements in high-speed production lines. At the same time, the dual-drive system can precisely coordinate the movement of the optical tube and the flat panel detector 15, achieving higher positioning accuracy and repeatability, making the detection of minute defects more accurate. Furthermore, the dual-drive structure gives the equipment better stability, effectively reducing wear and tear during high-speed movement and long-term operation. Minimal vibration and shaking ensure accurate and reliable test results. Furthermore, the dual-drive system allows for mutual backup between the two drive units. If one drive unit fails, the other can still maintain basic equipment operation, reducing the failure rate by half and improving equipment reliability and stability, thus ensuring production progress. Simultaneously, thanks to the innovative dual-drive synergistic architecture, the equipment achieves a leap in scanning speed and testing efficiency, directly doubling the testing speed compared to traditional single-drive models. It can seamlessly integrate with the efficient production rhythm of assembly lines, perfectly solving the bottleneck problem of production line testing efficiency, and ensuring a dual upgrade in production efficiency and quality control with its ultra-fast response capability.

[0031] In one embodiment, the conveyor belt module 38 includes several synchronous pulleys and a synchronous belt wound around the synchronous pulleys; the conveyor drive mechanism 36 includes a conveyor motor 361 mounted on a fixed frame 34, a first coupling 362 connected to the output shaft of the conveyor motor 361, and a drive shaft 363 rotatably connected between a first conveyor frame 32 and a second conveyor frame 33; one end of the drive shaft 363 also passes through the second conveyor frame 33, and the first coupling 362 is connected to the end of the drive shaft 363 passing through the second conveyor frame 33; two drive pulleys 364 are also mounted on the drive shaft 363, and the synchronous belts arranged on the first conveyor frame 32 and the second conveyor frame 33 are respectively wound around one drive pulley 364. The conveyor motor 361 can drive the drive shaft 363 to rotate via the first coupling 362. When the drive shaft 363 rotates, it can drive the two drive pulleys 364 to rotate, and each drive pulley 364 is wound with a synchronous belt, so it can drive the two synchronous belts to rotate synchronously, thereby conveying the product.

[0032] Meanwhile, the translation drive mechanism 35 includes a translation drive motor 351 and two ball screws 352; the translation drive motor 351 is mounted on a fixed frame 34, and the output shaft of the translation drive motor 351 is also driven and connected to a second coupling 353; the two ball screws 352 are arranged in parallel and spaced between the first transmission frame 32 and the second transmission frame 33, and one end of each ball screw 352 is rotatably connected to one side of the first transmission frame 32; each ball screw 352 is also equipped with a ball nut 354, and the second transmission frame 33 is connected to the two ball nuts 354; the other end of each ball screw 352 is also arranged through the second transmission frame 33, and one end of the ball screw 352 passing through the second transmission frame 33 is also connected to the second coupling 353; a transmission wheel is also installed on the end of each ball screw 352 passing through the second transmission frame 33, and a transmission belt is wound between the two transmission wheels. The translation drive motor 351 can drive the ball screw 352 connected to it to rotate via the second coupling 353. The two ball screws 352 are connected by a transmission wheel and a transmission belt, so the other ball screw 352 can also rotate synchronously. At the same time, the second transmission frame 33 is connected to the ball nut 354 installed on the ball screw 352. Therefore, when the ball screw 352 rotates, the second transmission frame 33 can be driven to move via the ball nut 354, thereby adjusting the distance between the second transmission frame 33 and the first transmission frame 32 to meet the transmission needs of products of different sizes.

[0033] Meanwhile, to ensure the accuracy of the movement of the second transmission frame 33, a sensing plate 355 is installed on the second transmission frame 33, and a U-shaped photoelectric sensor 356 that works in conjunction with the sensing plate 355 is also installed on the base 31. In addition, a cover plate 321 is installed on the top of the first transmission frame 32 and the top of the second transmission frame 33, and one side of the cover plate 321 extends to the side above the synchronous belt. The side of the cover plate 321 extending to the side above the synchronous belt can limit the two sides of the product to ensure the stability of the transmission. Furthermore, a blocking mechanism 322 is also installed on both the first transmission frame 32 and the second transmission frame 33. The blocking mechanism 322 includes a fixed base, a blocking cylinder installed on the fixed base, and a blocking plate connected to the blocking cylinder. One end of the blocking plate extends movably through the cover plate 321 and extends towards the synchronous belt. The blocking cylinder can drive the blocking plate to move, thereby stopping the product in a suitable position (detection position) for product detection.

[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-speed X-ray inspection machine with dual-drive cooperative control, characterized in that, The system includes a signal receiving device, a signal transmitting device positioned above the signal receiving device, and a product transmission line positioned between the signal receiving device and the signal transmitting device. The product transmission line includes two bases, a first transmission frame, a second transmission frame, a fixed frame, a translation drive mechanism, and a transmission drive mechanism. The two bases are arranged parallel and spaced apart, with a straight slide rail arranged along the length of the top of each base. One end of the first transmission frame is fixedly connected to one end of a base, and the bottom ends of the second transmission frame are slidably connected to the straight slide rails. A transmission belt module for transmitting products is also installed on the opposite side of both the first and second transmission frames. One end of the fixed frame is fixedly connected to the other end of a base, and the transmission drive mechanism is mounted on the fixed frame. The transmission drive mechanism is also connected to the transmission belt module and is used to drive the transmission belt module to rotate. The translation drive mechanism is mounted on the fixed frame and connected to the second transmission frame, and is used to drive the second transmission frame closer to or away from the first transmission frame.

2. The high-speed X-ray inspection machine with dual-drive cooperative control according to claim 1, characterized in that, The transmission belt module includes several synchronous pulleys and a synchronous belt wound around the synchronous pulleys; the transmission drive mechanism includes a transmission motor mounted on a fixed frame, a first coupling connected to the output shaft of the transmission motor, and a drive shaft rotatably connected between the first transmission frame and the second transmission frame; one end of the drive shaft also passes through the second transmission frame, and the first coupling is connected to the end of the drive shaft passing through the second transmission frame; two drive pulleys are also mounted on the drive shaft, and the synchronous belts arranged on the first and second transmission frames are respectively wound around one drive pulley.

3. The high-speed X-ray inspection machine with dual-drive cooperative control according to claim 1, characterized in that, The translation drive mechanism includes a translation drive motor and two ball screws. The translation drive motor is mounted on a fixed frame, and its output shaft is also connected to a second coupling. The two ball screws are arranged in parallel and spaced apart between the first and second transmission frames, and one end of each ball screw is rotatably connected to one side of the first transmission frame. Each ball screw is also equipped with a ball nut, and the second transmission frame is connected to the two ball nuts. The other end of each ball screw passes through the second transmission frame, and one end of the ball screw passing through the second transmission frame is connected to the second coupling. A drive wheel is also mounted on the end of each ball screw passing through the second transmission frame, and a drive belt is wound between the two drive wheels.

4. The high-speed X-ray inspection machine with dual-drive cooperative control according to claim 3, characterized in that, The second transmission frame is equipped with a sensing plate, and the base is also equipped with a U-shaped photoelectric sensor that works in conjunction with the sensing plate.

5. The high-speed X-ray inspection machine with dual-drive cooperative control according to claim 2, characterized in that, A cover plate is installed on the top of both the first and second transmission racks, and one side of the cover plate extends to the side above the synchronous belt.

6. The high-speed X-ray inspection machine with dual-drive cooperative control according to claim 5, characterized in that, Both the first and second transmission frames are equipped with blocking mechanisms.

7. The high-speed X-ray inspection machine with dual-drive cooperative control according to claim 6, characterized in that, The blocking mechanism includes a fixed base, a blocking cylinder mounted on the fixed base, and a blocking plate connected to the blocking cylinder; one end of the blocking plate extends movably through the cover plate and extends toward the synchronous belt.

8. The high-speed X-ray inspection machine with dual-drive cooperative control according to claim 1, characterized in that, The signal receiving device includes two first X-axis translation mechanisms, a first X-axis translation frame, a first Y-axis translation mechanism, a first Y-axis translation plate, a first Z-axis lifting mechanism, a first Z-axis lifting seat, and a flat panel detector; the two first X-axis translation mechanisms are arranged in parallel and spaced apart, and the bottom ends of the first X-axis translation frame are respectively connected to one of the first X-axis translation mechanisms; the top of the first X-axis translation frame is also connected to a first connecting vertical plate, and the first Y-axis translation mechanism is installed on one side of the first connecting vertical plate; the first Y-axis translation plate is connected to the first Y-axis translation mechanism, and the first Z-axis lifting mechanism is installed on one side of the first Y-axis translation plate; The first Z-axis lifting seat is connected to the first Z-axis lifting mechanism, and the flat panel detector is installed on the first Z-axis lifting seat.

9. The high-speed X-ray inspection machine with dual-drive cooperative control according to claim 1, characterized in that, The signal transmitting device includes two second X-axis translation mechanisms, a second X-axis translation frame, a second Y-axis translation mechanism, a second Y-axis translation plate, a second Z-axis lifting mechanism, a second Z-axis lifting seat, and an optical tube; the two second X-axis translation mechanisms are arranged in parallel and spaced apart, and the bottom ends of the second X-axis translation frame are respectively connected to one of the second X-axis translation mechanisms; the top of the second X-axis translation frame is also connected to a second connecting vertical plate, and the second Y-axis translation mechanism is installed on one side of the second connecting vertical plate; the second Y-axis translation plate is connected to the second Y-axis translation mechanism, and the second Z-axis lifting mechanism is installed on one side of the second Y-axis translation plate; The second Z-axis lifting seat is connected to the second Z-axis lifting mechanism, and the optical tube is installed inside the second Z-axis lifting seat; the bottom of the second Z-axis lifting seat is also provided with an emission port corresponding to the optical tube, and a protective cover is also installed at the emission port.

10. The high-speed X-ray inspection machine with dual-drive cooperative control according to claim 9, characterized in that, An industrial camera and a ring light source arranged below the industrial camera are also installed on one side of the second Z-axis lifting platform.

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