Introduction：APX5103 is easy to use and is of the advanced control algorithm, which can be used to make more accurate, more efficient equipments. The electrical loop design makes APX5103 have the excellent frequency response of up to 3-5 hz. High-level self-setting reduces position errors and narrows the positioning time to about zero. A creative algorithm for vibration resistance control eliminates mechanical resonance. APX5103 is suitable for almost any motors and can meet the requirements of any type of feedback and any I/O. A package of commissioning for current, speed and position control is conducted by supplying the seamless test run through GUI software or the direct access to the end terminal.