Unable to detect stall condition of stepper motor using powerSTEP01 Voltage Mode

[shrikant_swami]

Currently we are evaluating voltage mode feature of powerstep01

Motor Parameters:

Motor Phase Resistance: 8.4 ohm

Motor Phase Inductance: 5.2 mH

Ke: 0.07392

We have tested voltage mode by changing current from 0.5 to 1.1 A. Test report are attached

Also In application we are operating motor from 2 to 14 RPM

Kindly share your feedback on test result and test procedure.Please go through it. Let me know anything is required.

[Cristiana SCARAMEL]

Hello @shrikant_swami​,

The embedded stall detection is not able to discriminate between running and stall motor when there is a small current difference between the two cases.

Moreover, in your solution the target current is very low compared to the capability of the IC and it could be difficult to set a reliable threshold.

You can overcome this issue adding a shunt resistor on the SENSEx pins, even if operating in voltage mode, increasing the drop measured by the stall detection circuitry.

[Cristiana SCARAMEL]

Hello @shrikant_swami​,

have you had a chance to test the suggested changes?