Hello, I am in despair. I thought I was clever and could fix anything but obviously I am not.
I have a goodway lathe with Fanuc OT control. When the machine is first turned on, the z axis can only be moved about 5mm in each direction, then after about 1min alarm 424 comes on, which is a servo error, although no error code appears on the servo amplifier.
I thought the axis was mechanically stuck so I removed the motor but the same thing happens. the motor spindle will only travel about 1/3 rd turn in each direction. also there is a whistling noise coming from the motor, the more I try to turn it the louder it gets.
The motor turns easily by hand.
On the diagnostics page I get 00100000 which is ovc error.The motor and wiring seem Ok and I have recieved the servo amplifier back from testing with no fault found.
Can anyone help me please?