Duet 3 Toolboard extruder motor not idling down?

[dc42]

I suspect you are right and idle current reduction is not working on tool and expansion boards. I will look into it. You should be able to use M917 though. The wiki says the default is 100% but I think that's wrong for tool boards, it's either 71% or 75%.

[oozeBot]

@dc42 thank you. I'll look into this.

I just ran M999 on the machine and it quieted down considerable (I can now hear all motors barely idling). The toolboard stepper is much quieter now and has already dropped to 40c. I'll monitor it a bit longer to see if it cools to room temp.

[dc42]

After a reset, if you have never commanded any movement from the tool board motor then it should be off completely. Same with all the other motors.

[oozeBot]

@dc42 well M917 didn't seem to work.. unless I just don't know what I'm doing. After a job completed today, I ran M917 E0 and marked the extruder temp at around 48c. I checked it about 30 minutes later and it was at 78c!

[dc42]

@oozeBot said in Duet 3 Toolboard extruder motor not idling down?:

@dc42 well M917 didn't seem to work.. unless I just don't know what I'm doing. After a job completed today, I ran M917 E0 and marked the extruder temp at around 48c. I checked it about 30 minutes later and it was at 78c!

What M917 command did you use?

[oozeBot]

@dc42 from the console in DWC:

M917 E0

[Phaedrux]

Is 0 perhaps too low?

https://duet3d.dozuki.com/Wiki/Gcode#Section_M917_Set_motor_standstill_current_reduction

[dc42]

I confirm that idle current reduction does not always work on expansion or tool boards in current firmware, especially on extruders, and that this is fixed in the forthcoming RRF 3.2beta3. Thanks for reporting it. I will test M917 next.

[oozeBot]

@dc42 Thanks for not dropping this! I look forward to testing the new beta..

[dc42]

I've tested M917 and it is working on a tool board for me.