[3.6.0-beta.3+1] Extruder stall detection

Leonard03

Hello everybody!
Can anyone please confirm that extruder stall detection works on 3.6.0-beta.3 or +1 on a Duet2 WIFi?

M915 P3 S-64 H10 or M915 E S-64 H10 should rise a stall event with virtually no movement, right?
Move command is G1 H1 E70 F600, extruder is a Bondtech BMG, around 415 esteps
Reducing motor current during this phase I tried from 10 to 80 percent
Acceleration 3000mm/min
Acceleration during homing move 1000mm/s

Leonard03

Remapping driver 3 from the extruder to an axis (V axis in my case) seems to rise the stall event. So it seems to be a bug with extruder stall detection in this version.
By the way, during a move, M122 shows that the extruder SG is not available..

Leonard03

I am sorry.. Only now I've seen on GitHub issue/feature request #930.
Is there any chance that this feature request to be part of rc.1 ? Or it will be implemented after 3.6.0 stable?

T3P3Tony

@Leonard03 its currently flagged for After 3.6.0. Once we have 3.6rc1 or 3.6.0 stable out we will have a better idea of what will be in 3.7.

Leonard03

@T3P3Tony Understood. Thank you for the clarification. I will wait

dc42

@Leonard03 did extruder stall detection work for you in firmware 3.5.x ?

dc42

@Leonard03 for clarification: extruder stall detection does work for the purposes of using an extruder stall to load filament using a G1 H1 Exxx command. Such a use of stall detection does not raise an event.

dc42

I have updated https://github.com/Duet3D/RepRapFirmware/issues/930 with info on how to determine whether a G1 H1 E move was terminated by an extruder stall or not.

dc42 created this issue in Duet3D/RepRapFirmware

closed Feature request: when using stall detection filament loading (G1 H1 Exx) flag whether a stall occurred #930

Leonard03

I am sorry for the long time not saying anything. Sadly, even with the 3.6.0-beta.4 the extruder stall detection not seem to work. As stall detection is unavailable for the extruder.

I have this macro to test this:

M17 E0
M302 P1

M913 E40

T0 P0

M83

M915 E0 S-60 H10 R0 F0


var ex0pos = move.extruders[0].position
G1 E-1 F1200  ; small E move of more than 1 full step to ensure that the extruder is not stalled
G4 P250
G1 H1 E67
M400
if (move.extruders[0].position - var.ex0pos < 67)
  echo "Extrusion stopped by stall"
else
  echo "Extrusion completed without stalling"

echo "diff:", move.extruders[0].position - var.ex0pos
M915 E0


M913 E100

No mater the M915 parameters, if driver 3 (in my case) is assigned to an extruder, stall detection does not trigger. If the same driver is assigned to an axis (eg V) stall detection is trigger immediately without any move

By the way, for the M915 parameters, E0 sets the correct parameters but P3 don't