??Over Adhesion to Spring Steel Sheet??
This is so weird to be posting this. Since the first time I started 3d printing I always had to fight to keep my prints keeping that perfect level of adhesion to where they would stay stuck the whole time. Never once did I have issues with them not coming undone. Now my prints are sticking so well that it is actually already pealing the coating off of my sheet. I am using PETG and using the Prusa Mini settings and every print is coming our amazing.
Am I doing something wrong? Or is Prusa's magic voodoo coating on these sheets making the PETG stick too well?
I am also new to printing with PETG so thank you in advance for any advice.
RE: ??Over Adhesion to Spring Steel Sheet??
Yeah, there is a big mistake: YOU DIDN'T READ THE MANUAL.
Look for bed preparation for PETG. There is a reference to chapter 10.1:
✔ Use Windex when printing with PETG
❗ IPA + PETG will cause the print to adhere very strongly to the sheet. Removing it could be extremely difficult.
For PETG you need do reduce the adhesion and for that you can use ordinary window cleaners.
RE: ??Over Adhesion to Spring Steel Sheet??
Did you read the instructions telling you you need to use a separating agent for PETG on the smooth sheet? (Windex, glue stick)?
RE: ??Over Adhesion to Spring Steel Sheet??
@lichtjaeger
I have actually been doing windex. Sorry I forgot to mention that I did read the manual but I am still peeling chunks out.
Granted I am using cheap windex but I don't think that should matter.
@vintagepc
I had not used glue stick due to that was usually how I got things going good on glass.
RE: ??Over Adhesion to Spring Steel Sheet??
Windex or a few wipes of the fingers over a uniformly clean PEI sheet usually suffice for PETG. Just a cautionary note that higher-temp materials may require something more. I ran into the limits of Windex when printing some PETG at 270C and trashed my 1st surface. I now have a dedicated "hot & sticky" sheet that I use with gluestick or MagiGoo when trying unknown materials.
RE: ??Over Adhesion to Spring Steel Sheet??
Don't try to remove the PETG parts while the build sheet is still hot/warm. Let it cool down before you try to rip the part off.
What I find weird is I print with PETG 100% of the time on 2 of my 3 mk3s with smooth PEI sheets. Unlike what I see a lot on these forums I have never used windex, glue or any other release agents. I'm still using the original PEI on my sheets with no pull ups or rips. I also use IPA before every print and have sanded all my sheets, weird!
RE: ??Over Adhesion to Spring Steel Sheet??
Don't try to remove the PETG parts while the build sheet is still hot/warm. Let it cool down before you try to rip the part off.
What I find weird is I print with PETG 100% of the time on 2 of my 3 mk3s with smooth PEI sheets. Unlike what I see a lot on these forums I have never used windex, glue or any other release agents. I'm still using the original PEI on my sheets with no pull ups or rips. I also use IPA before every print and have sanded all my sheets, weird!
It depends very much on your PETG, some is more sticky than others depending on the blend/manufacturer/print temp.
RE: ??Over Adhesion to Spring Steel Sheet??
Hmm interesting note on the higher temps but the PETG I have been using from Overture has been running really good on the predefined Prusa Mini Settings for PETG. Wondering if it is just more sticky. Tried a mix of fingers and windex on a small run yesterday and that did not seem too bad. Going to see how it does with a longer print today. Then guess give running some glue stick a try if that does not give longer prints a good layer.
RE: ??Over Adhesion to Spring Steel Sheet??
Don't try to remove the PETG parts while the build sheet is still hot/warm. Let it cool down before you try to rip the part off.
What I find weird is I print with PETG 100% of the time on 2 of my 3 mk3s with smooth PEI sheets. Unlike what I see a lot on these forums I have never used windex, glue or any other release agents. I'm still using the original PEI on my sheets with no pull ups or rips. I also use IPA before every print and have sanded all my sheets, weird!
It depends very much on your PETG, some is more sticky than others depending on the blend/manufacturer/print temp.
I have used 4 - 5 different manufactures of PETG and still have never had any issues, guess I'm lucky! 🙂
RE: ??Over Adhesion to Spring Steel Sheet??
Actually found a solution for my Overture PETG over adhesion... Changed the type of window cleaner I was using lol. The old one had too much IPA in it, went to a type with no IPA and my over adhesion issues has gone away.