Electrical network optimization of stepper motor applications need to tear open outfit, correct disassembling correctly or not directly affects the correct use of the motor, and even cause the damage of the parts, so people to the tear open outfit more wary, avoid the mistakes of man-made devices. This paper is to introduce stepper motor in the disassembling time need to pay attention to matters. One, according to the instructions manual for people on stepper motor disassembling time must be strict in accordance with the instructions manual and specifications for the corresponding dismantling work, open program and device happens to be exactly the opposite, is in accordance with the procedures for disassembling ability effectively avoid mistakes device and open it. 2 people, can't touch injury parts in dismantling of stepper motor, but also pay attention to not damaged parts. For example: when the open end cover, can't bulge stator coil to the outside of the frame that touch an injury; When placed in the rotor, put it in as far as possible on hardwood pad, and the liner can't mat underneath the slip ring. Three, the components counting of stepper motor in unit time, to all of its components and product manual control, only after all the components are completely talents for device, in open it time to open the parts counting, only parts are completely, talents will be the same. Axis.