Underruns, ways to reduce?
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@LeckieTech Firmware version?
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@Phaedrux it is 2.05.1 Im seeing after running the part again, several times actually. The print keeps freezing but not in the same spot though, in the same area however. I noticed just before it freezes that the extruder jittering back and forth something beyond normal. Its changing directions so fast its probably losing steps. I never heard it the first time around because its mounted on fan noise isolators since all of our printers are running pressure advance of 0.42 so its normal for them to be jittering but not like this. I tried to adjust my X Y acceleration and jerk values and found that lowering the acceleration seems to ease the extruder chaos. I read that DC42 said to increase it. Maybe its not the same issue after all
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@LeckieTech Are you using cura 4.6 by any chance?
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@bot No, I'm using S3D. I've narrowed it down to exactly what is causing this now. When pressure advance is on (mine is set to .42) I'm finding some of the radii in my model are getting broken down into what appears to be way too many moves. So I reduced my model mesh to not allow any triangles larger than 0.08mm without losing too much resolution. That made no difference at all. Its 100% only inside perimeters and infill that causes the crashing, the outside perimeters print without any hesitation. I reduced the infill speed and it seemed to fix the crashes during infill. To stop the crashing on the perimeters I have to reduce my speeds substantially, from 90mm/s down to 40!
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well, that's one way to do it. Had a spare feeder sitting on the bench plugged in so I'm not wasting precious filament during this pandemic. I started a print and walked away and when I came back it was unplugged on the floor with a short to ground message from DUET! So I guess it's true, you can short a driver, don't hotplug your motors kids.
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@LeckieTech said in Underruns, ways to reduce?:
I started a print and walked away and when I came back it was unplugged on the floor with a short to ground message from DUET! So I guess it's true, you can short a driver, don't hotplug your motors kids.
As that motor has a removable cable, it's quite likely that the phases were not paired correctly, and that is what caused the driver to fail.
