Abstract: A control system for a cyclically operating machine is disclosed wherein one or more operations are to be performed during each successive machine cycle. Signal generating means or a voltage generating means proportional to machine speed establish a sequence of signals or a voltage during each machine cycle, for producing a charge. An initial charge level or voltage is established, which can have a value of either a zero voltage or some other predetermined voltage at the beginning of each cycle. The voltage is changed as the signals are received or voltage is generated until a second predetermined voltage is reached, which can be either higher or lower than the initial voltage, at which time a control signal is emitted which may perform an operation associated therewith, such as by starting or stopping a machine motion.