Out of control and out of step check steps when stepping motor starts running - Database & Sql Blog Articles

KT2520K26000DCW28QAS import spot

Photocoupler

When the stepping motor starts running, loss of control and out of step generally consider the following aspects:

1) Whether the motor torque is large enough to drive the load, so 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, a CMOS input stepper driver is also required.

3) Whether the starting frequency is too high, whether the acceleration process is 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. .

4) When the motor is not fixed, this condition sometimes occurs, which is normal. Because, in fact, a strong resonance of the motor is caused at this time, resulting in an out-of-synchronization state. The motor must be fixed. 5) For 5-phase motors, the phase is incorrectly connected and the motor does not work.