PLA on satin sheet -- marginal adhesion?
Six months into using my Core One, I am generally happy with the reliability and print quality. (Having resigned to the VFAs, which are not going away even with the latest belt tuning and slicer profiles.) "Start the print job, walk away, come back to a good result" is the norm.
But sporadically I get failed prints because the object is not adhering to the build plate. This can be a curled-up corner which results in distorted models if I am lucky, or a crashed nozzle when things go badly. Small objects may even come loose entirely. It has typically (only?) happened with PLA on the satin sheet, in different locations on the sheet.
I do my best to keep the sheet smudge-free, and wash it with dishwashing soap and warm water occasionally. I have not played with the heatbed temperature so far but always used the slicer defaults -- because the failures are too sporadic, it's difficult to do systematic optimization.
My question: Is PLA adhesion to the satin build sheet known to be a bit weak? Do I need to clean the sheet differently or more often, or is it recommended to increase the bed temperature? Or is the weak adhesion a sign that something might be off in my Core One, e.g. a deviation in the measured bed temperature or a more-uneven-than-usual temperature distribution across the bed?
(PrusaSlicer does not have a setting for the type of build plate, where it adjusts first layer height or temperature, right? Or have I overlooked something all the time?)
Thanks! Jürgen
RE:
Yes Pla doesn't stick well to the satin sheet imo.
I always print PLA on the PEI smooth sheet and it sticks much better.
RE: PLA on satin sheet -- marginal adhesion?
I had enough problems with the Prusa satin sheet that I switched to the BIQU Cryo. The only thing I don't use it for is TPU, I use a cheap textured plate for that. It sticks too well to the Cryo even with a separation layer. You can see my thread on the Cryo. Everything, including "exotic" filaments stick to it and the only warping issue I had was a PC filament print that covered most of the sheet and which actually lifted the sheet off the bed.
And, yes, I wish PrusaSlicer had a sheet selection since this sheet can run 10-20C cooler than the satin sheet.
RE: PLA on satin sheet -- marginal adhesion?
Over the years, I moved from mostly satin to mostly textured for my prints (pretty much independent of filament type). I don't even have a smooth sheet anymore, I just hate the aesthetics of the first layer on smooth. PLA usually prints fine on the satin for me but stuff happens with certain models, in which case I usually slap a layer of Layerneer or Magigoo on and call it a day. I don't have time or inclination to futz around with temperature optimization.
Now, for a long time I had an issue with PLA on satin producing a first layer that was just too low and gave me a lot of issues. Plenty of comments on Github from people with the same issue. I had to manually adjust Live Z on the LCD display once the print started by turning it up by +0.03. At the same time, PETG required an adjustment by -0.04, go figure. "Always perfect first layer", yeah right. (I think they actually stopped using that marketing phrase). Interestingly, over the last few months this seems to have resolved itself, don't know why, when, or how, I can't recall seeing any notes to that effect in firmware release notes.
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: PLA on satin sheet -- marginal adhesion?
I run satin for everything, only on some very specific really difficult PLA prints have I needed to resort to the standard smooth sheet. Maybe some PLAs are more warp prone than others,