Zero point detecting instrument of stepping motor

The utility model relates to a step motor zero point detector, comprising a shell and a control detection functional circuit; wherein a communication interface and a step motor control interface are embedded on the shell. The control detection functional circuit comprises a central processing module, a power source managing module, a communication control module, a step motor control module, a signal acquisition and processing module; the power source managing module is connected with the rest modules; the central processing module is connected with the rest modules; the communication control module is connected with the communication interface; the step motor control module and the signal acquisition and processing module are respectively connected with the step motor control interface. Such step motor zero point detector feeds the measured zero value back to a meter which then adjusts the driver according to the feedback, thus reaching the purpose of eliminating errors and making the meter more accurate; meanwhile, the step motor zero point detector can support a position machine for control and is simple in structure, practical and convenient to use, with reliable and stable work performance and wide application range.