A symptom / cause / remedy table for ball-screw feed axes: abnormal noise, lost accuracy, sticking, overheating and rust, plus when to check the support bearing.
| Symptom | Possible cause | Check & remedy |
|---|---|---|
| Noise / abnormal sound | poor lubrication, contamination in the circuit, over-preload, damaged support bearing | re-lubricate, clean & shield, re-check preload, replace bearing |
| Lost accuracy / increased backlash | nut preload loosened, screw worn, support bearing clearance, coupling loose | re-tighten lock nut, check support unit, re-align coupling |
| Sticking / crawling | rail-screw parallelism out of tolerance, poor lube, overload beyond Ca | re-check parallelism, improve lubrication, verify load |
| Overheating | over-preload, speed over DN limit, lube failure | reduce preload, control speed, use high-temp grease |
| Rust / pitting | high humidity, coolant ingress, no anti-rust care | add telescopic cover, stainless/coated screw, periodic anti-rust |