Phase inductance out of range after changing shunts

Support
1

Hi

I’m trying to drive an industrial servomotor Mitsubishi HG-KR43 using odrive. With standard shunt resistors, it passes the calibration but because of the low current, odrive has some problems with controlling it.
I decided to change resistors to 3mohm.
After doing that I changed the resistor value in the code and now whenever I try to go through the calibration process I got
MOTOR_ERROR_PHASE_INDUCTANCE_OUT_OF_RANGE
error.

Also when I check the phase inductance in odrivetool it’s negative
phase_inductance: -0.0037159868516027927
I’ve checked the soldering twice and everything looks good.

Could you please help?

Motor max current is around 9A and winding resistance is 3.2Ohm

2

Did you check the recommendations in the error code? ODrive.Motor.Error | ODrive

3

Yes, nothing worked.
It’s really strange to me that it’s been working with the old shunts. I believe it shouldn’t change anything in terms of phase inductance. Also, what about the negative value of inductance? What can cause that?