Manual Pulse Generator is an optical rotary encoder designed for manual input of pulses to CNC machine tools. It is mainly used for instruction type CNC machine tools. CNC machine work origin setting, manual step fine adjustment, interrupt insertion during machining, etc. The band switch is used for the selection of the axis and the override, and the encoder is used for the pulse to facilitate the acquisition of the system. It is classified according to the supply voltage, resolution, and signal output type, thus forming a manual pendant suitable for various types of CNC control systems.