Abstract: An apparatus for insuring that the rotational speed of a spindle on a machine is prevented from exceeding a selected programmed speed. The apparatus is comprised of means for continuously receiving pulsed signals indicative of the instantaneous rotational speed of the spindle over a timed cycle, wherein the cumulative signal within the receiving means at the end of each timed cycle is representative of the actual rotational speed of the spindle.

Abstract: Apparatus for controlling repetitive cutting cycles on a work piece being cut by a cutting tool of a lathe. The apparatus is comprised of means for storing a plurality of coded signals to control a depth of cut, a length of cut, a removal and a return path for a cutting cycle, and a desired number of identical cutting cycles. Further provided is means for enabling successive and sequential movement of the cutting tool over a complete cutting cycle of the work piece. Also provided is means coupled and responsive to the enabling means for controlling a continuation of the cutting of the work piece over additional identical cutting cycles. The number of identical cutting cycles is predetermined by a coded signal received by the controlling means from the storing means, and the depth of the cut for each cycle is predetermined by a coded signal received by the enabling means from the storing means.