An ezpath I run at work frequently has a shakey x axis, The "bridgeport" repair guy thinks it needs a new servo motor, which dose not make sense to me.
It used to shake constantly a small ammount (more than dithering) until one day it was left by its self for a while (hours) and shook until it smoked the servo.
A new servo was installed and now it only shakes after rapid moves until it calms down 5-10 seconds then its stable. but this sounds like and under dampened servo drive to me. Right now its overshooting its position by about .030" if the F'ed up threads it produces are any indication.
It can still make good parts, because I'm good, real good.
so what do you guys think?