Originally Posted by
Beltdrive
I can't say for certain if the amps are the same between the X and A, the motors are different though.
Under the cap on the servo motors is an encoder/resolver which are the same on DC drives.
Normally we would check fuses and swap amps first.
Then the encoder would be the suspect.
And the motor last. (Most expensive and hardest to do.)
The axis card could be at fault although I've never had to change one.
I had a bad axis cable once that acted in the manner you described.
It ultimately fried the motor before the problem was found.
a mega ohm meter can help diagnose bad cables and motors.
I've been running fadals for 20+ years now.
In the last 10 I have been doing more and more maintence. Change motors, amps, encoders, spindles ect.
There are 3 fadals in the shop, all have 4th axis, only 1 has DC drives.