What Are The Causes of The Jitter of The Trapezoidal Screw?
Publish Time: 2026-08-07 Origin: Site
The jitter of the trapezoidal screw during operation is usually caused by multiple factors such as mechanical, electrical, operating environment and parameter settings. The specific causes can be classified into the following categories:
I. Mechanical and hardware reasons
1. Excessive clearance and wear: After long-term use, the screw and the nut wear out, resulting in excessive clearance (back clearance) and causing wobbling and jitter during heavy loads or phase changes; the loosening of the nut clamping device can also cause jitter.
2. Assembly and installation issues: The parallelism of the screw and the guide rail exceeds the tolerance (not installed parallelly); the unsecured screws of the coupling or the misaligned installation of the coupling can cause radial load or vibration during operation; excessive assembly tolerance.
3. Component damage or deformation: Rust, damage or loose clearance of the bearings; the screw bends due to long-term heavy load or impact, resulting in excessive radial runout; the nut or screw thread damage (such as wear, foreign matter getting stuck causing uneven friction).
4. Poor lubrication: Insufficient lubrication or deteriorated and caked lubricating grease, resulting in increased friction resistance and uneven distribution, which is prone to cause jitter under heavy loads.
II. Electrical and drive reasons
1. Motor abnormalities: Abnormal motor rotation (such as jamming, single-phase operation) or motor failure, resulting in uneven output torque and causing jitter.
2. Power supply issues: Unstable power supply voltage (such as intermittent under-voltage), causing fluctuations in motor working current and affecting the stability of operation.
3. Improper servo parameter settings: Incompatible servo motor parameters (such as excessive rigidity setting) lead to resonance or tracking errors in the system, causing jitter.
III. Operating and environmental reasons
1. Abnormal load: The actual load exceeds the rated carrying capacity of the screw, or it is heavily loaded or biased, causing elastic deformation or resonance of the mechanical system.
2. Environmental interference: Poor operating environment (such as high temperature causing thermal expansion and contraction to damage the clearance, or dust and iron filings entering the gap between the screw and the nut causing uneven friction) can also cause jitter during operation.
When troubleshooting faults, it is recommended to follow the sequence of "mechanical troubleshooting (clearance, wear, installation) → electrical troubleshooting (motor, power supply, parameters) → operational troubleshooting (load, environment)" to eliminate faults one by one.