Stepper motor appears to be out of step - 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) 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% of the actual torque when the user selects the model, because the stepping motor can not be overloaded, even if it is instantaneous. , will cause loss of step, severely stopped or irregularly repeated.
(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 of the upper controller If the circuit is a CMOS circuit, a CMOS input driver is also required.
(3) Whether the starting frequency is too high, whether the acceleration process is set on the starting 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 idle. 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 a 5-phase motor, the phase is incorrectly connected and the motor cannot operate.