What happens when a stepper motor stalls?

Is stalling a stepper motor Bad?

1 Answer. Stepper motors (depending on how they are driven) are generally always on. You change the polarity of the signal driving the coils in a sequence to control movement. So leaving the motor powered is not going to damage it.

Why does a stepper motor stall?

Stepper motors are brushless. The maximum torque at any given speed that the motor can produce is when the rotor leads or lags the commanded position by one full step. The motor will stall if the error between the commanded position and the rotor position exceeds two full steps.

How do I know if my stepper motor is bad?

Most inexpensive motors use glue to hold the shaft to the rotor, and most quality steppers will use grooving along with adhesive. To test the motor, first use an ohmmeter. It will indicate if a winding is burnt up and what type of step motor you have, usually a bipolar or unipolar.

Do stepper motors wear out?

Since a stepper motor has no brushes to wear out, its life usually far exceeds that of other mechanical components in a system. … If the motor is run at or near its rated torque or thrust, life will be affected.

Can a stepper motor slip?

When this occurs, the system slips into the adjacent cycle of the error-torque sine wave. When this happens the stepper, in effect, has just lost four steps. If the rotor is not able to regain synchronization with the stator, many more steps may be lost.

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Can a stepper motor run continuously?

Stepper motors fall somewhere in between a regular DC motor and a servo motor. They have the advantage that they can be positioned accurately, moved forward or backwards one ‘step’ at a time, but they can also rotate continuously.

Can you manually turn a stepper motor?

Normally, you can easily turn a stepper motor shaft by hand, and you can feel each of the 200 ‘detents’ as you rotate the shaft. However, these motors were very hard to turn by hand. Well, the motor was just fine.

Can you move a stepper motor by hand?

No, it won’t cause any damage, at least in non-pathological cases where you’re not exceeding some shaft or drive train mechanical limits and are applying a torque directly to the stepper shaft. A similar thing happens when you try to accelerate too fast and the motor loses steps.