Originally Posted by
servtech
The cav feedmotor couples with the z axis when the collet is closed. Your errors seem to point to an overload of this motor and the main spindle running too fast with the collet open. It could be your collet clamp signal is at fault, possible causing the barfeed motor to push when collet is closed, causing this motor to overload.
I would look at collet inputs around the time of bar feedout, in case timing is wrong causing faults. Use the control scope function for inputs and outputs to look at the timings