Adhesion problems with PLA & PETG on the Satin Sheet
Hi everyone,
I wanted to share an issue I’ve been struggling with on my new Core One, and hopefully get some insights from other users.
I’m getting inconsistent adhesion with both PLA and PETG on the Satin sheet. What’s strange is that I use the exact same filaments, the same cleaning routine, and the same cloths and IPA that I use with my Prusa Mini+ — and on the Mini+ everything sticks perfectly every time.
What I’ve tried so far (PETG on Satin):
- Cleaned with hot water + dish soap
- Rinsed and dried thoroughly
- Wiped with IPA (same brand and cloth as for the Mini+)
- Same nozzle & bed temperatures as on the Mini+
The only real difference I can think of is that the Core One might be printing the first layers faster than the Mini+. However, the lifting doesn’t happen during the very first layer — it usually happens a bit later. So I’m not sure if speed is really the cause.
Despite all that, PETG still lifts randomly. I printed the exact same part on the Mini+ Satin sheet → perfect adhesion. I also tried the PEI sheet on the Core One → PLA sticks fine.
To double-check, I printed the same model again on the Core One Satin sheet, and it was still a lottery — sometimes it holds, sometimes it lifts.
Right now I switched to the textured sheet for PETG on the Core One, and it seems to work much better.
But I’m still confused why the same Satin surface behaves so differently between the Mini+ and the Core One.
Has anyone else experienced this difference between machines? I’d love to hear if I’m missing something obvious.
Thanks!
RE: Adhesion problems with PLA & PETG on the Satin Sheet
For PLA and PETG especially do you have the vents open? Also, try opening the door for both. I gave up using the Satin sheets. Was too much hassle and switched to the BIQU Cryogrip Pro. I don't even have to clean it between prints.
RE:
This is curious as it's 100% different to my experience. FWIW I have the smooth, satin, and textured Prusa and also the BIQU Cryogrip pro. I've had PETG stuck so hard to the smooth sheet it damaged it on removal, but the other 3 are problem-free for both PLA and PETG filaments. I've also used ASA and TPU on the satin without issue.
Like you I clean with IPA between prints. When I've had adhesion issues (on all including BIQU) this is resolved with the dishwashing detergent wash every time. I initially thought your satin must be contaminated somehow and advise the wash, but you've already tried that.
Are your filaments well dried? I've had adhesion issues even with PLA and the drier sorted that. The location of my printer is always 60+% relative humidity though so mine's not in a usual nor helpful environment.
Failing that, is it possible the coating on your satin isn't right? Might be worth a livechat with Prusa support.
Hope this frustrating situation is resolved soon for you.
RE: Adhesion problems with PLA & PETG on the Satin Sheet
Are you using 2 different satin sheets.. If the sheet is new I’ve had issues with the textured sheet where there is a film on it from the factory and I had to gently scrub it with a plastic dish wash sponge. But I suspect maybe the heat beds are heating to different temps. The best way to tell is you get some type of thermal temperature probe and aim it at the heat bed in both units to test. I suspect the Core One might be cooler than your Mini. So many factors to think about..
1..If you do a small square on both machines, is the first layer squished the same amount. Maybe the CoreOne Z distance is slightly higher and not pushing the filament into the bed enough
2. Check surface temp of the bed.. you might have to dial the Core One up a bit.
3. If you slow down the print on the Core one does that help?
4. If all else fails, or you don’t want to go thru this.. I often use cheap glue stick on my textured sheet for PLA.
I find that IPA is not as good a cleaner as soap and water for PETG and PLA.. (especially PLA). But it looks like you are using that.
RE: Adhesion problems with PLA & PETG on the Satin Sheet
Thanks all for your input!
I have two dry boxes. I take my filament out of the vacuum bags and place them in the dry box while printing. The humidity inside the dry boxes is currently between 22–26%, so I’ll probably regenerate the silica gel and maybe run a drying cycle as well.
I hadn’t thought about it, but it’s true that I significantly reduced the Z distance on the Mini+, so the first layer is really squished onto the sheet.
During my tests with the textured sheet, I cleaned the satin sheet extremely thoroughly — very hot water and a lot of scrubbing with dish soap (using my hand only, no sponge or brush). I dried it with toilet paper since I didn’t have a clean cloth available at the moment, haha. After that, I was able to print without issues.
Unfortunately, I can’t run more tests during the weekend.
But next week, I might try increasing the bed temperature by 5°C for the first layer, and if that’s not enough, I’ll also slow down the first layer. If none of this helps, I’ll contact support to potentially discuss a problem with the coating.
Have a nice day!
RE: Adhesion problems with PLA & PETG on the Satin Sheet
What is your room temperature? I only see adhesion issues with PLA and PETG when the room temperature climbs above 25c and I can’t keep the chamber temp down to get enough cooling of the print, in my case it is the second layer that lifts the first still being too soft. Keeping the top off helps for a few small prints such days but at 30c I try to use other materials.
/Anders
RE: Adhesion problems with PLA & PETG on the Satin Sheet
The room temperature is 22 °C. Right now, I’m still using the default Prusament PETG profile (adapted for Polymaker PolyLite), which assumes a chamber temperature of 35 °C. I found that a bit strange, but I left it like that. I’ll lower it to 25 °C. For PLA I also kept the default profile, and I think it uses 20 or 25 °C by default — I don’t remember exactly.
RE: Adhesion problems with PLA & PETG on the Satin Sheet
The room temperature is 22 °C. Right now, I’m still using the default Prusament PETG profile (adapted for Polymaker PolyLite), which assumes a chamber temperature of 35 °C. I found that a bit strange, but I left it like that. I’ll lower it to 25 °C. For PLA I also kept the default profile, and I think it uses 20 or 25 °C by default — I don’t remember exactly.
I use default profiles and satin sheets for PETG, smooth sheets for PLA, this far only with Prusament filaments but I doubt that matters, at 22c ambient temperature I never had the issues I described.
/Anders
RE: Adhesion problems with PLA & PETG on the Satin Sheet
Soap and hot water - a drop of plain Dawn or Fairy disk detergent using fresh paper towels to wash and dry - skip the alcohol wipe. Handle the sheet only by the edges.
RE: Adhesion problems with PLA & PETG on the Satin Sheet
Problem solved: the only thing I changed was skipping the IPA cleaning. I now use only hot water and dish soap, and I haven’t had any issues since. I didn’t change any settings.
Thank you all and have a nice day !