An on-car disc brake lathe system for resurfacing a brake disc of a vehicle brake assembly includes a lathe body with a driving motor, a cutting head operably attached to the lathe body, and a drive shaft. The system also includes an alignment system having an electronic controller, input and output...http://www.google.ca/patents/US7337699?utm_source=gb-gplus-sharePatent US7337699 - Apparatus and method for automatically compensating for lateral runout
