What are the common fault diagnosis and troubleshooting methods of ball screw?

Fault diagnosis and troubleshooting methods of ball screw:

Fault phenomenon: high machining parts roughness value

Cause of failure: the lubricating oil of the guide rail is not enough, causing the slide plate crawl
Troubleshooting method: add the lubricating oil, eliminate the lubrication failure

Cause of failure: ball screw with local scratch or abrasion
Troubleshooting method: replace or repair screw

Cause of failure: screw bearing damage, the movement is not smooth
Troubleshooting method: replace damaged bearing

Cause of failure: servo motor is not adjusted, the gain is too large
Troubleshooting method: adjust the servo motor control system

Fault phenomenon: large reverse error, processing accuracy unstable

Cause of failure: screw shaft coupling taper sleeve loose
Troubleshooting method: Re-tightening and repeated testing with dial indicator

Cause of failure: the screw shaft slide plate with pressing plate too tight or too loose
Troubleshooting method: re-adjust or repair, with the 0.03mm ruler not enter is qualified

Cause of failure: the screw shaft slide plate with the wedge too tight or too loose
Troubleshooting method: re-adjust or repair, the contact rate of more than 70%, with the 0.03mm ruler not enter is qualified

Cause of failure: ball screw preload is too tight or too loose
Troubleshooting method: adjust the preload, check the axial movement value, so that the error is not greater than 0.015mm

Cause of failure: the ball screw nut end face is not perpendicular to the joint surface, combination too loose.
Troubleshooting method: repair, adjust or padded handle

Cause of failure: screw pedastal bearing preload too tight or too loose
Troubleshooting method: repair adjustment

Cause of failure: large ball screw manufacturing error or axial movement
Troubleshooting method: automatic compensation of the control system can eliminate the gap, with the instruments to measure and adjust the screw movement

Cause of failure: inadequate or no lubricant
Troubleshooting method: adjust to each rail surface are lubricants

Source: http://www.machineballscrew.com Ball Screw Assembly Replacement Parts.