Been rough trying to get and stay positive throughout the process and I’m still hopeful. However, after a few really nice prints, then a ton of fails, then a good calibration print, immediate failure after and I’m left lost here. The first two images are printed up as a calibration test, the ones to follow are of a ‘production’ print. The last image is the underside of the print. The print barely wanted to come off of the plate and I can’t count how many scratches I’ve put into these plates trying to get support leftovers off or prints that wouldn’t snap off from bending the plate after. I’ve spent 24 hours trying to get this same model to print, and various changes in parameters with no luck. It’s SunLu fast petg matte white. I even slowed it down to 100mm/sec for outer walls as per some advice I read on reddit about printing this filament and petg in general to prevent issues with overhangs and also cooling set to 15 for max fan speed threshold.
For petg i need to do a z-offset -0,025 / -0,035 i can see after the bedmesh witch i need. Got the bedmesh a range 0,4300 / 0,4800 then i use the -0,025 . Above that range around 0,5000 i use the -0,035.
I got a printer profile for petg with a z-offset but sometimes i forget to switch. Some prints wil come out ok but if there is support it wil fail most of the time because the nozzle wil break the support.
1 in like 10 prints i do not need a z-offset and everything come out great dont know why.
Hope my experience with this helps you.
Thanks a lot for that. Here’s the result of me testing for a while gradually moving the offset up landing at +0.16:
Something even more interesting, I ran a PLA print just now and forgot to change the offset and it’s about the best calibration print I’ve done in PLA almost. So it makes me think that somehow this Z is at a more zero than 0, with a +0.16, and that it needs no adjustment up or down from there. lol. My mind is blown because I was taught that PLA needs a tighter squish to get that layer adhesion and I just put my calibration disc in a pair a channel locks and cranked down and it still didn’t snap or separate.