Hi,
Procedure how to replace the x-ballscrew of CP642.
1. Before you remove the x-motor, remember the pulse of x-axis motor just it turn ON the zero set sensor. Pulse usually at 1000pls. +/-50pls. 2. Turn Off the machine. 3. Compress the two ballscrew covers. Fix it with tie wrap 4. Loosen the coupling connecting the x-motor and ballscrew. 5. Remove the x-motor. 6. Remove the 4 big allen screw fixing the x-motor bracket. 7. Remove the 2 positioning pins of x-motor bracket. 8. Loosen the other side of the bracket. Then, remove the bracket by tapping with soft mallet. 9. Remove the cover of the ballscrew. 10. Remove the 4 bolts from ballscrew. 11. Position the x/y table at the rear and leftmost of the machine. 12. Get a position wherein you can pull-out the ballscrew from the machine. 13. After successfull pull-out. Remove the ballscrew from the bracket. 14. Remove the angular bearing. 15. Clean the brackets. Put AFC grease on the bearings. Install the angular bearing. Note: For angular bearing, their is a V-shape mark. The V-shape mark must pointing the motor. If the bearing orientation is wrong, unusual sound will heard during table movement. And the life of the bearing will shorten. 16. Assemble the ballscrew and the x-motor bracket respectively. Put all the parts, such as bracket, ballscrew cover, and collars. Tighten all the screws and set screws. 17. Install the ballscrew. 18. Fix the ballscrew to the table. 19. Put the end bracket of the ballcrew. Note: Before connecting the end bracket, see to it, you put the ballscrew cover. Do not fix yet the bracket (Hand tight only). 20. Fix the x-motor bracket. Do not forget to put the 2 positioning pins. 21. Install the coulping. 22. Install the x-motor. Note: Coupling must be sliding smooth from the ballscrew shaft and the motor shaft. 23. Perform ballscrew alignment using dial gauge. Z and Y position of the ballscrew must be 0.1mm. After getting the right alignment fix the end bracket. 24. Check for heavyload on the ballscrew when travelling it manually from right to left or vise versa. Note: if you feel the ballscrew is heavy conduct again the alignment. 25. Power on the machine. Conduct zero setting. 26. After machine is zero set, Inch the motor to the pulse you recorded earlier. 27. Position the table wherein the zero set sensor just turned-ON. 28. Position the x-axis coupling where you can easily tighten the screws. 29. Remove the tie wrap from the ballscrew covers. 30. Double check all the bolts. Be sure all are tighten. Ballscrew replacement is DONE!!!
Good Luck.
Jaslen
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