Abstract: A programmable apparatus for generating machining pulses for an electroerosion machine tool system so that it can be made operable for a plurality of different machining methods, different workpiece materials, and different electrode materials without sacrificing machining performance. The type of data detected at the gap, as well as the manner in which the data is evaluated, may be selected according to the specific requirements of the machining being performed. The on-times and off-times for the machining pulses supplied to the gap are independently programmable and controlled for generating pulses having an optimal pulse width. The peak current may also be independently programmable and controlled. The programmed data may be updated during machining automatically or by operator input. Consequently, through the use of different programs, a single pulse generator hardware design may be used in a multitude of machining methods without sacrificing machining performance.