Stepper motors moving but with minimal torque

[jwilliam28]

I have a duet wifi running a syringe pump setup using two geared extruders. Today when setting up for a print I found that while the extruder steppers would respond to a direct command to extrude they weren't doing so during a print. Simultaneously I found that the extruders had very little torque when turning compared to previously. I also have intermittent warnings about poles a and b being disconnected for the driver I'm attempting to use to extrude.
Several people work with the printer so I checked the config. Motors we're set to reasonable current values. I'm running the most recent firmware. I checked connections and wires and swapped motors to no effect. I swapped the extruders on to the y axis stepper and they worked normally with sufficient torque.
I'm not quite sure what's going on or what to check next.

Thanks

[Phaedrux]

@jwilliam28 said in Stepper motors moving but with minimal torque:

I also have intermittent warnings about poles a and b being disconnected for the driver I'm attempting to use to extrude.

I would suggest redoing the wiring. You may have an intermittent break in the wire or bad crimp.

[dc42]

Also, send M906 without parameters, and check that the motor current is the value you expect. Similarly, send M913 without parameters and check that the current is set to 100%.

[jwilliam28]

@dc42
Hello,

It seems the current settings weren't being saved. I redid the config and it's working now.

Thank You