Does a Stepper Driver Have Stall Protection/Detection Function?

Currently, none of our stepper drivers (open-loop) on sale are equipped with a stall protection function. However, all our closed-loop drivers have a built-in position error exceeding alarm, which can serve as an effective alternative. This is the core detection method for stall or blockage in a closed-loop system.

[https://www.omc-stepperonline.com/stepper-motor-driver?mfp=323-encoder-feedback[Yes%20(Closed%20Loop)]](https://www.omc-stepperonline.com/stepper-motor-driver?mfp=323-encoder-feedback[Yes%20(Closed%20Loop)])

We assume that your need for a stall protection function is to achieve automatic shutdown when the motor stalls due to external force.

If this is the case, the position error alarm works similarly: When an external force causes the motor to stall, the position data returned by the encoder will deviate from the commanded position instruction received by the driver. If this deviation exceeds the driver’s set threshold (which can be adjusted using the driver's tuning software; the default is typically one revolution of the encoder, e.g., 4000 CPR), the driver will trigger an alarm, stop working, and consequently the motor will stop running.

Moreover, the position error alarm does not require the motor to be completely jammed (stalled). It can provide early warning as long as the motor load is excessive, or obvious step loss/following lag begins to occur. In fact, this is safer.

Updated on: 28/05/2026