Layer shift again?? This is getting frustrating
- Adjusted belts per app to ensure proper tightness
- Enabled "Avoid crossing perimeters" as other threads suggested
- Enabled Stealth Mode as other threads suggested
Same result, layer shift. At this point, the only common thread I can see is that this happens when using the 0.6mm nozzle, and possibly when using thicker layer profiles. Any suggestions on what to adjust to prevent this?
RE: Layer shift again?? This is getting frustrating
You might want to check the extrusion multiplier, e.g. via a thin-walled calibration cube. It might be too high for the material.
Too much plastic with nowhere to go, the head gets stuck eventually. But this is just generic advice, maybe someone else can spot "evidence" from the picture or confirm it doesn't look overextruded.
Another potential "gotcha" (according to what I've read) at the back of the print are overhangs that curl upwards when cooling, trapping the nozzle.
RE: Layer shift again?? This is getting frustrating
It could be any of (or all of) these:
- Belts are too loose
- Print head colliding with print due to warping
- Umbilical and Bowden tube droops and gets wedged between the print head and the x-motor knocking the head out of position
- Other
I would start by checking the belt tension and rerunning homing calibration.
RE: Layer shift again?? This is getting frustrating
I was dealing with a similar issue on another part, and resorted to ChatGPT for some help tuning the settings. It worked, so I'm hoping it can similarly help with this part as well. AI seemed pretty adamant that a .4mm layer height is a no-go for a 0.6mm nozzle. Even going to a .25mm layer height, it didn't like the settings that were default in PrusaSlicer, and suggested some other ones. Night & day difference.
So far my takeaway is that default profiles in PrusaSlicer aren't something you can rely on to get the desired results. It's great that you can create custom ones, but wondering if I'll need to do this for every new design I run through this thing.
RE: Layer shift again?? This is getting frustrating
BTW, looking at the above picture (pin holes in the white part), my AI proposes to crank up infill/perimeters overlap from default 15 % to maybe 30 % 🙂
Please show us the underside of a failed print.
Cheerio,
RE: Layer shift again?? This is getting frustrating
haha, yep that was one of its suggestions. Set to 25% on the white print:
BTW, looking at the above picture (pin holes in the white part), my AI proposes to crank up infill/perimeters overlap from default 15 % to maybe 30 % 🙂
RE:
@diem here is the underside of the failed part above. Don't mind the cracks, that was from ripping the shifted layers off
RE: Layer shift again?? This is getting frustrating
To clarify, the above black part, was with the 0.6mm ObXidian nozzle, with the default 0.40mm STRUCTURAL print profile.