Core One - XY reference point seems to fail mid-print
Hello,
I'm having a weird problem where part way through a print, it seems like the printer will lose its XY reference point. I just had a print fail (it's the inside part of a self-watering planter), and as you can see in the video below its printing circles into thin air for some reason, offset from the centre of where it should be by several cm.
The part in question is the InSWPP150.stl file found here: https://www.printables.com/model/249128-self-watering-plant-pot-with-water-indicator/files
It was printed in Prusament PETG, with all default settings, except the fill type is set to concentric. 2 perimeter walls. Plusa Slicer v2.9.3, firmware 6.3.4.
Does anyone have any ideas?
Thanks!
RE:
I don't think the video upload link above worked, so trying again
https://storage.googleapis.com/prusa3d-content-prod-14e8-wordpress-forum-prod/2025/10/49b31bb8-20251023_143819l.mp4
Also I was printing with the default brass 0.4mm nozzle, in Prusament PETG in Jetblack.
RE: Core One - XY reference point seems to fail mid-print
In case anyone is wondering, the layer shift (a term I now know) was caused by enabling "Avoid crossing perimeters". This setting apparently has a bug in it that is known to cause layer shifts.
This topic is resolved. Thanks!
RE:
Hi,
a software glitch is one explanation. Another fairly common root cause is if the print head gets stuck so the motors skip some steps (often it is only one motor that skips so a perfect diagonal shift results).
I've had it happen from too high extrusion multiplier (too much material with nowhere to go). Or overhangs curl upwards when cooling.