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.
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?
Yeah I had an issue with this trying to print some ornaments in vase mode. I adjusted the cura profile as detailed HERE and it seemed to take care of it.
Yeah maybe that’s what’s causing my issue, although it’s a bit more extreme in my case than his. I’ll definitely give that a try.
That solved it, printing with PETG was just a strange coincidence then, but I’ve never seen this before.