How to troubleshoot return error in measuring instruments?

Return error refers to the difference produced when the instrument measures the same position during forward and reverse strokes. Excessive return error will directly affect the measurement accuracy.

Common causes

1. Guide rail gap is too large: After long-term use, the wear of the guide rail causes the gap to increase, resulting in a return error.
2. Screw clearance: The clearance of the ball screw pair has not been eliminated or the preload force is insufficient.
3. Drive system issues: The control accuracy of the motor or driver decreases.

Troubleshooting methods

1. Use a standard measuring block to measure the same size in both directions and calculate the difference.
2. If the difference exceeds the allowable range, it indicates that there is a return error
3. Step by step check the guide rail, screw, and drive system to determine the specific reasons.

Solution

1. Adjust guide rail clearance or replace worn guide rails
2. Adjust the screw preload or replace the screw
3. Check the drive system parameter settings and contact the manufacturer for repair if necessary