Originally Posted by
mike_Kilroy
so, I am shutini down computer so will write extra anyway. you need to remove the 3 motor leads Ma,Mb,Mc from drive and power up. if still squeel and foldback, the DRIVE is shorted inside. no fault? power down, put cable back on drive, unplug other end - power ms connector on motor. repeat. if fault, yor cable has a phase to phase short in it. no fault? then your motor is shorted out inside. doing this tsting, do not remove the feedback cable off system. just power cable. let us know.