The TG-12x4 Autocycle Method. This method is similar to the one above, however instead of the wheels staying closed for the entire process, the grinding wheel will retract at the end of the cycle. This is done also with a witness mark, however the more sophisticated way is to have an eye to trigger the autocycle units retraction. This method of grinding is still popular and used in many companies. For multiple tapers, you would grind the parts in multiple operations, starting with the taper closest to the body of the wire.