Moved the extruder reversing to a seperate thread!
https://forum.duet3d.com/topic/37655/3-6-0-rc-1-unexpected-extruder-reversing
@chrishamm
i made a video showing the suspect back emf generator - and maybe the cause of the esd events which may cause the mcu to reset.
You see that the printer is moving normal until 0:28 the first loud clong, and at 0:29/0:30 the second.
PA and IS are active.
Ill reprint this file with PA and IS disabled to check if the clong is caused by one of them.
2025-03-07-16-56-27-499(2).mp4
/Edit:
Ok, today I was listening for that sound, and I can also hear it on the Duet2 printer. It sounds like there is a move without acceleration.
/edit 2: checked it with PA and IS disabled - the movement stays the same, the extruder is reversing but there is not a single E- in the whole file. The printer uses firmware retraction, but the reversing is mid move - so not while retracting.
attached is the gcode file.
T013_ACM_Angle v1_L0.3mm_N0.8_NYLON_MBL480_2h12m.gcode
The clong sond is predominand at Z=3.8 the internal bridge infill layer.