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

submitted 10 months ago* (last edited 10 months ago) by [email protected] to c/3dprinting

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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 10 months ago

Did printing with PETG ever work with your printer?

I have done a few prints in PETG before, only 2 or 3, but they didn't have the issue.

You could create two gcode files for the same model, one for PLA and one for PETG and see if something stands out in their difference.

Yeah I was planning on trying this when I get home.