This message was posted by StringNet on AmayaUsers.com. PLEASE DO NOT REPLY VIA EMAIL. Instead, respond to the thread on the WEBSITE by clicking here: http://www.amayausers.com/boards/cgi-bin/ultimatebb.cgi?/topic/1/892.html#000002 To me it sounds like you might have a loose pulley on either the y motor or on the y shaft. I have seen this a few times over the years. The pulleys are locked to the shaft with set screws that tighten to a flat spot on the shaft. If the screw works its way loose the pulley could randomly rock back and fourth on the shaft resulting in a registration issue similar to what you describe. =========================================================== The AmayaUsers Mailing List Website: http://www.amayausers.com Discussion Board: http://www.amayausers.com/boards Subscribe/Unsubscribe: http://www.amayausers.com/list ===========================================================