Stepper motor is not working properly - Database & Sql Blog Articles

Photocoupler

When the stepping motor starts running, sometimes it will not move or move back and forth in the same place. Sometimes it will lose the step when running. What is the problem?

Generally consider the following aspects for inspection:

1. Is the motor torque large enough to drive the load? Therefore, we generally recommend that the motor should use a motor with a torque greater than 50%~100% than the actual one, because the stepper motor can't be overloaded, even if it is instantaneous. Causes a loss of step, a serious stop or irregular movement.

2. Whether the current of the input walking pulse from the upper controller is large enough (generally >10mA), so that the optocoupler is stably turned on, and the input frequency is too high, resulting in no receiving, if the output circuit of the upper controller For CMOS circuits, CMOS input drivers are also required.

3. Is the starting frequency too high? Is the acceleration process set on the startup program? It is better to start the acceleration from the starting frequency specified by the motor to the set frequency. Even if the acceleration time is short, it may be unstable or even in a passive state. .