Design of a Testing Device for Servo Motors Based on STC

This paper develops a testing device for servo motor which uses microcontroller STC125410AD as CPU and has the function of linearity test,three-point test,dead-zone test,speed test,torque and size test,lock condition of limit position condition.The hardware part elaborates the designs of CPU interface circuit,digital display driving circuit,encode switch cirtcuit design;the software part mainly describes the design of main program,the principle of angle and speed control of servo motors,interrupt program of pulse counting.The testing device was of high accuracy,light weight,convenient operation,and can precisely test the basic parameters of servo motors and is of good generality.