Try increasing hotend temp for first few layers and hotbed temp throughout
the default from the printer was 60C. I had some better results with 70C. But the issue still happend with more delicate prints.
those PEI sheets usually need higher bed temp than the regular sheets
thanks. I didn’t know that. What magnitude are we talking here (like: 10K more for PEI-sheets? or more like 1K?)
Try moving z closer for first layer
I think this may be the solution. How much should I change the z-offset? (the print in the video has 0.2mm layer height. And the worst-adhession issues happened with 0.1mm)
Thanks everyone. I raised the initial temp by 5 degree, and reduced the z-offset by 0.05mm. It looks great now
https://imgur.com/a/Vd24Skm
it is printing the fidget star now. Note, that each star has a thickness of 2 walls. The 1 corner is a little bad, because i took to much to time adjust the z-offset.