When the arm runs to the upper and lower two limit position, respectively press the lower limit switch, cut off the main control circuit, variable amplitude motor parking, to limit the role.
当臂杆运行到上下两个极限位置时，分别压下限位开关，切断主控电路，变幅电机停车，达到限位的作用。
2
A method of stepping motor driver circuit was given, composed by a chopper type current mode switch regulator and a monolithic stepping motor driver TA8435H.
提出采用斩波式电流型开关电源结合单片式步进电机驱动器TA8435H，构成一种电机驱动电路的方案。
3
The circuit potion achieves the positive inversion of the motor through touching a stroke control switch when the drinking bottle shredder is running.