We have an older Gabbiani CNC cutting machine (1992) from Italy. Its servo drive and servo motor are from Siemens. Now we have the problem, that the servo motor of the x-axis moves only backward and can't move forward !!
All sensors and actors are OK. I checked all inputs and outputs of the PLC, there is nothing that blocks the motor to move forward.
Also, when the motor was not assembled on the gear, we tried to run the motor forward, but it did not work. Otherwise as we run the motor backward
it works !!
So any one can help me or have an idea about this problem? especially, why the servo motor moves only in one way , backward ?!?!!?!
thank you very much