X axis of the CNC lathe machine could not be moved under JOG mode, but the coordinate value on the CNC controller is changing, and there is no any alarm.

As the Z axis is normal, so it is not +24V power supply problem.

Exchange the signal control cable of X and Z axis, the same problem happened on Z axis too, so it is not servo driver or mechanical problem neither.

According above this should be signal control cable’s problem, press the X+ key on the CNC controller, and check the A,B and C pulse lights on the AC servo driver, the H phase light is not on, this means the X axis has no enable signal, and the motor of X axis can be rotated by hand, the signal cable must be broken, confirm it with a universal meter, then change the cable, the problem solved.