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Stuttering when printing PETG [SOLVED] (sopuli.xyz)

submitted 9 months ago* (last edited 9 months ago) by [email protected] to c/[email protected]

2 comments fedilink hide all child comments

I tried printing with PETG yesterday, and I noticed that it intermittently stops moving during the print for a few seconds. It doesn't throw an error or anything, just stops and then after a few seconds resumes as if nothing happened. But this creates huge blobs where it stops. It only happens when printing PETG, not PLA. Could this be caused by a filament setting in my slicer? I'm using prusa slicer. I inspected the gcode and there are no stops, pauses or color changes etc. in it. The behaviour happens both when printing from octoprint and directly from SD card.

Edit: these random intermittent stops are 10-20 seconds long, causing massive blobs from oozing filament.

Edit 2: so it seems to not actually be a PETG specific issue, but rather a model size/speed issue. I can get it running without stops if I just reduce print speed. When I crank speed to 100% I start getting these weird 10-20 second long stops.

So I'm overloading the controller with a lot of gcode commands in rapid succession? I'm running at slightly lower than manufacturer default Max.

SOLVED: the gcode resolution was set too fine, I increased it from 0.0125mm to 0.5mm as described here and the stuttering disappeared.

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[–] [email protected] 1 points 9 months ago* (last edited 9 months ago)

I did some more testing, also with different slicers, and it seems to not actually be a PETG specific issue, but rather a model/speed issue. I can get it running without stops if I just reduce print speed. When I set speed to 100% I start getting these weird 10-20 second long stops.

So now in thinking it's the controller locking up because it's overloaded by too many small movmeent gcode commands in rapid succession?