Just finished assembling my 4x8 table , running refurb dell Winxp with Mach3. Assembled to spec, motors slide up and down when powered off easily, no binding etc. However all motors make god awful racket , jerky , like theyre fighting themselves when being moved around in Mach3. Any ideas? Ive searched, changed a few settings from what Ive found online. https://youtu.be/XrbyXTfMFhs