¶ Mars 4 Max - Lead Screw Motor Replacement
¶ When to replace
The motor does not run properly and still cannot work normally after checking the wiring.
¶ Tools and materials needed
- 2.5 mm Allen wrench
- 2.0 mm Allen wrench
- Grease
- Dust-free cloth
- Alcohol
¶ Reference video
¶ Precautions before operation and machine status
Be sure to turn off the machine and remove the power supply before operation.
¶ Operation steps
1. Use a 2.5 mm Allen wrench to loosen the 3 screws fixed on the top of the front cover of the printer base.
2. Use a 2.0 mm Allen wrench to loosen the 3 screws fixed on the left side of the front cover of the printer base.
3. Use a 2.0 mm Allen wrench to loosen the 3 screws fixed on the right side of the front cover of the printer base.
4. Use a 2.0 mm Allen wrench to loosen the 3 screws fixed under the front cover of the printer base.
5. Lay down the front cover of the printer base (be careful that there are still cable connections inside).
6. Flip open the cover of the LCD cable holder on the motherboard, and then remove the cable of the exposure screen.
7. Unplug the limit switch cable, air purifier cable, and motor cable from the motherboard in sequence.
8. Use a 2.5 mm Allen wrench to loosen the eight screws fixing the middle plate.
9. Lift up the middle plate and wipe the refractor with a dust-free cloth dipped in alcohol.
10. Use a 3.0 mm Allen wrench to loosen the four screws fixing the top cover of the linear guide rail, and remove the top cover of the linear guide rail.
11. Turn the lead screw by hand to adjust the Z-axis connecting slider to the top position to facilitate subsequent operations (You can operate Z-axis lifting on the touch screen before disassembling the machine).
12. Use a 2.5 mm Allen wrench to loosen the two screws fixing the anti-backlash nut.
13. Hold the lead screw with one hand, turn the anti-backlash nut with the other hand, and remove the anti-backlash nut from the top of the screw rod.
14. Use a 2.5 mm Allen wrench to loosen the two screws fixing the motor. When the last screw is about to be removed, hold the motor from the rear to prevent it from falling.
15. Pull out the lead screw motor from the rear.
16. Unplug the motor cable.
17. Use a 2.5 mm Allen wrench to loosen the two screws fixing the shock washer.
18. Remove the shock washer pad from the top.
19. Peel off the black sticker attached to the surface of the motor (do not discard it, you can continue to use it later).
20. Take out the new lead screw motor.
21. Re-apply the black sticker to the surface of the motor.
22. Put the shock washer in the mounting position from the top of the lead screw.
23. Use a 2.5mm Allen wrench to tighten the two screws fixing the shock washer.
24. Insert the motor cable.
25. Install the lead screw motor from the rear of the hole.
26. Use a 2.5 mm Allen wrench to tighten the two screws fixing the motor.
27. Hold the lead screw with one hand, turn the anti-backlash nut with the other hand, and install the anti-backlash nut from the top of the screw rod.
28. Use a 2.5 mm Allen wrench to tighten the two screws fixing the anti-backlash nut. These two screws do not need to be tightened. Pay attention to tighten them later.
29. Align with the screw holes on the base and install the middle plate (pay attention to combing the cables).
30. Use a 2.5 mm Allen wrench to tighten the eight screws fixing the middle plate.
31. Insert the limit switch cable, air purifier cable, and motor cable on the motherboard in turn (The cable ports are different in size, so be sure to distinguish them before inserting them).
32. Insert the exposure screen cable into the motherboard port.
33. Comb the cables and put them into the cable clamp.
34. Align the screw holes and place the front cover of the printer base into the mounting position.
35. Use a 2.5 mm Allen wrench to tighten the three screws fixed on the top of the front cover of the printer base.
36. Use a 2.0 mm Allen wrench to tighten the three screws fixed under the front cover of the printer base.
37. Use a 2.0 mm Allen wrench to tighten the three screws fixed on the right side of the front cover of the printer base.
38. Use a 2.0 mm Allen wrench to tighten the three screws fixed on the left side of the front cover of the printer base.
39. Power on the printer.
40. Use a brush to apply grease to the lead screw and slider, and move up and down to make the grease fully mixed. Operate "Tools - Manual" on the touch screen, click the "Little house" button, and the printer will return to zero.
41. After the return to homing movement is complete, use a 2.5 mm Allen wrench to tighten the two screws fixing the anti-backlash nut.
42. Align the screw holes, place the top cover of the linear guide rail to the mounting position, and use a 2.0 mm Allen wrench to tighten the four screws fixing the top cover of the linear guide rail.
43. Click on the 10 mm on the touch screen, then click the up button several times to observe if the Z-axis movement is normal.
44. Operate "Tools-Calibration-Next" on the touch screen to light up the correct pattern. After re-leveling the printer, observe the exposure screen and it can be used normally.
