minimum extrusion amounts
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Yes you could map two extruders to a single tool and set a mixing ratio of 1:1
https://duet3d.dozuki.com/Wiki/Gcode#Section_M567_Set_tool_mix_ratios
That should cause them both to extrude at the same time.
Do you have any photos of previously "good" prints?
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@Phaedrux said in minimum extrusion amounts:
Yes you could map two extruders to a single tool and set a mixing ratio of 1:1
https://duet3d.dozuki.com/Wiki/Gcode#Section_M567_Set_tool_mix_ratios
That should cause them both to extrude at the same time.
Do you have any photos of previously "good" prints?
Added these lines, a quick test extruding shows both motors seems to be moving at similar rates. Here is what I added to my config.g,
M569 P0.4 S1
M584 X0.0 Y0.1 Z0.2:0.3 E20.0:0.4M563 P0 D0:1 H1 F0 S"1LC" ; Define tool 0
M567 P0 E1:1I was tuning pressure advance/acceleration resonance before this issue happened, here is a picture of one of my test prints.
About to run the print, I'll let you know if the 2nd motor seems to skip.
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@vishiano said in minimum extrusion amounts:
About to run the print, I'll let you know if the 2nd motor seems to skip.
Not definitive but the 2nd motor doesn't seem to exhibit the issue. The 2nd motor's motion also seems like it's smoother to me. I would think this narrows it down to either something on the toolboard, the hemera motor, or maybe something with the CAN connection.
I had a suspicion this would be the case so I bought another hemera motor and another toolboard this morning. I'm hoping they get delivered by Saturday so I can do some testing over the weekend.
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Those prints definitely look better!!
Please keep us posted on your progress.
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Sadly the replacement toolboard and hemera motor wont arrive till Monday. However I need to do a print for a friend so I tried hooking up the extruder motor to the Duet 3 mainboard instead of the toolboard. I then tried my stringing test sliced by prusaslicer that so far has failed to print every time.
Tons of stringing but then I designed it as a stringing test and it's also printed with a 0.6 volcano nozzle. I also probably need to redial in my settings after changing a ton of them trying to fix the issue. Surfaces look good and I didn't see any signs of the motor stuttering or skipping areas of the print. I think it's safe to say this is an issue with the toolboard. I'll be able to confirm once the 2nd toolboard gets here but I'd be curious if anyone has any suggestions what on the toolboard it could be. Maybe a bad stepper driver?
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Got the new motor and toolboard from filastruder.
I just tried the new motor hooked up to the old toolboard, I then tried to print my stringing test again and got the same issue on the same areas. I think I've ruled everything else out and this proves to me it's something with the toolboard.
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Did you try the new tool board too?
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@Phaedrux Right about to, it's a bit more work than the motor
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@Phaedrux Ok now I'm very confused. Appears to be happening with the new motor and new toolboard as well...
Going to try making a new connector for the motor.
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@Phaedrux
I tried using the new connector that came with the new toolboard. no luck. I'll try some more stuff tomorrow.Would it be possible to setup both toolboards and have them both extrude a print simultaneously? Even if no filament is loaded I should be able to tell if the extruder is showing the issue.
