I try to connect a closed loop stepper motor to Duet2 using an expansion breakout board. Before I used a normal stepper motor with an external driver on Duet.

When I use the jog command (G0) with a push button it works. When I use other commands like homing (G1) it goes wrong. The movements are not coherent and the distance is no longer correct. When I use the push button the distance is ok.

Same result if I set closed loop operation with a switch.

The strange thing is that the driver does not alarm for missed steps. So the driver does not see the missed steps.

When I block the motor the driver alarms for missed steps.

Motor and driver: https://www.oyostepper.es/goods-587-Kit-CNC-paso-a-paso-de-circuito-cerrado-de-1-eje-YE-Series-12-Nm-4A-motor-y-controlador-de-circuito-cerrado-Nema-23.html Does anyone have experience with this? Or any ideas how to solve this problem?