The instability of precision CNC lathes may be caused by many factors. The following is an analysis of some possible reasons:

1. Mechanical issues:

Bearing wear: CNC lathe bearings wear for a long time or due to lack of lubrication, which can lead to bearing instability, vibration and noise.

Transmission system problems: Worn or loose components such as gears, belts, chains, etc. in the CNC lathe transmission system will affect the smoothness of the movement and lead to instability of the machine tool.

Guide rail problems: CNC lathe guide rails are unevenly installed, poorly lubricated, or severely worn, which will lead to unstable axial movement and affect the processing quality.

2. Electrical problems:

Power supply problem: The unstable power supply of the CNC lathe will cause the CNC system to run unstable and affect the normal operation of the motor and other components.

Wiring problems: Loose wiring, poor contact or aging circuits on CNC lathes will cause unstable circuit connections and affect the stability of the CNC system and drive system.

3. Hydraulic and pneumatic issues:

Hydraulic system problems: Leakage, oil contamination or unstable pressure in the hydraulic system of CNC lathes will cause unstable movements of hydraulic components and affect the quality of workpiece processing.

Pneumatic system problems: Unstable air pressure or blocked air paths on CNC lathes will cause unstable pneumatic components, affecting the accuracy and stability of workpiece processing.

4. Control system problems:

CNC system failure: CNC lathe CNC system software or hardware failure will lead to unstable command transmission and affect the stability of the machine tool movement.

Sensor failure: CNC lathe sensor failure or improper installation will cause the CNC system to be unable to accurately obtain the machine tool motion status, thus affecting the stability of the control system.

5. Environmental factors:

Temperature changes: Large temperature changes in CNC lathes will cause thermal expansion and contraction of machine tool parts, affecting the stability of the machine tool.

Vibration and impact: External vibration or impact of a CNC lathe will affect the working stability of the machine tool, especially for precision machining.

The above is an analysis of some reasons that may cause instability of precision CNC lathes. Systematic inspection and analysis are required for specific situations to determine the accurate causes and take appropriate measures to repair them.