Hey all,

I've got an issue that started the other day. My VMC 760/22 stopped changing tools - the carousel won't come forward to the spindle, and it alarms out with a "Tool Arm Timeout".

I took the motor that drives the tool arm off and it appears the brake is stuck on.

There is 230VAC at the pins for the brake all the time; is this supposed to be the case? I would assume the brake would be deactivated with this power present, which indicates I have maybe two separate problems - the brake does not disengage when energized, and the machine is attempting to disengage the brake constantly.

Does anyone know what the proper behaviour is? Is anyone with one of these machines willing to measure some voltages for me (eg on the TLAUF card, measure AC volts between JP11-3B and JP11-2B, wires 112 and 113, with the drives on and the machine homed)?

Thanks for any help,

Isaac