关于进化速度的问题现在必须解决：进化是逐步进行的，还是总在短时间内发生？
The question about the rate of evolution must now be turned around: does evolution ever proceed gradually, or does it always occur in short bursts?
步进电机的运转操控着走纸的速度，步进电机假如装置没有到位，同样会到致使走纸速度反常。
The operation of the stepper motor control the speed of paper, stepper motor if the device is not in place, the same will lead to abnormal paper speed.
步进电机受脉冲的控制，通过改变通电的顺序可改变电机的旋转方向，改变脉冲的频率可改变电机的旋转速度。
Step motor control, by pulse by changing the order of electricity can change the motor rotation direction, change the pulse frequency can change the motor rotation speed.
应用推荐