This paper analysised factors of system error by gas viscous resistance and photoelectric timer, and suggested to amend it. 分析气体粘滞性阻力和光电计时器所引起的系统误差的因素,以及修正这误差的建议。
Combined with the CPLD counter unit, completed the hardware design of photoelectric encoder, at the same time with the CPLD timer unit, completed the stepper motor drive circuit design. 同时结合CPLD的定时器单元,完成了步进电机的驱动电路设计。
Parellel interface uses the circuit of photoelectric isolation, and gives the timer. 并行接口电路采用光耦隔离电路,给出了接口时序。