I tried wiring in the recommended approach for servo disable signal connecting the 14v pins together on the J4 connector and connecting the ena pin 15 to pin 1 . this approach worked on the X servo and the z servo but my y servo started to do a twitching creep that continues any time the servo is powered up I disconnected wiring I had put in first to the y servo then to the other two thinking it was some sorta noise thing but the twitching creeping continues any time the drive is powered up. Any ideas? thanks Chris