I have an EX21 power supply with a A320-D wire machine. The V axis motor gets hot. The motor was tried on the Y axis servo controller and is working OK. The V axis servo amp was sent out and repaired then sent to sodick to be reprogramed. The problem did not go away. I have ordered a another servo box from Sodick on the chance the amp box was not repaired properly. The servo motor makes a strange noise and the shaft keeps cycling back and forth. Anyone have an ideas that may be helpful???