[Zamknięte] Buildplate damaged by PETG  

RE: Buildplate damaged by PETG

Powder-coated or foiled?

The powder-coded plate didn't need special preparation. If you have the foiled plate, you should give the plate a wipe with window cleaner (no ammonia) before printing with PETG. It will slightly reduce adhesion.

Also, it is way more easy to remove the object from the plate after cooldown.

RE: Buildplate damaged by PETG

Thanks for the reply and the tip with windowcleaner. Maybe I did take the print off to soon :-(. It looks like a foil piece came of. I was not aware there are two versions of the smooth one. Or did you mean the powedered one is the one with the structure? 

RE: Buildplate damaged by PETG

@tech

Yes, the powder coatet is the textured one and more stable as the foiled smooth sheet. You should only remove printparts after the bed was cooling down to roomtemp.

The smooth sheet you can temporarily repair:

or change the whole foil (have fun 😎):

RE: Buildplate damaged by PETG

It's the first time you said something about the type of your plate. 😆

To answer your question: At the moment, Prusa only sells smooth foiled plates and textured powder-coated plates. Both are PEI surfaces.

For some time, they also did sell smooth powder coated sheets but they are not available at the moment, because they working on the formula.

Other companies also sell complete plates and/or foils of different types and materials.

RE: Buildplate damaged by PETG

Posted by: @tech

Thanks for the reply and the tip with windowcleaner. Maybe I did take the print off to soon :-(. It looks like a foil piece came of. I was not aware there are two versions of the smooth one. Or did you mean the powedered one is the one with the structure? 

At the time the Mk3 was originally announced at the end of 2017, Prusa intended to sell smooth and textured powder-coated PEI sheets. These have the "baked on" finish which is supposed to be more durable. It was quickly apparent they were having production issues, and they withdrew the smooth powder-coated option. At present, the only powder-coated option is the textured sheet, although Prusa has hinted that the smooth powder-coated option may return.

The older option is the smooth PEI sticker, sold as separate sheets, or pre-applied to a spring steel sheet. You can (with a bit of patience and elbow grease) replace the PEI sticker sheet. The Prusa PEI is very nice, but the BuildTak PEI sheets use adhesive that is much easier to replace in the future, although it is a bit thicker and will require a separate Live-Z calibration as do the powder-coated sheets.

I was able to temporarily repair my damaged PEI sticker with a bit of blue tape until I got around to replacing it. Not perfect, but usable. Here's my original smooth PEI stickered spring steel sheet showing the battle damage from trying high-temp PETG at 270C, the blue tape patch job, and the same high-temp stuff after printing with MagiGoo to improve separation.

Here's that same spring steel sheet with the Prusa PEI sticker replacement. Note that these sheets really like to corrode, so it looks ugly but the PEI surface is as smooth as the original. This is my designated "sticky stuff" sheet now.

RE: Buildplate damaged by PETG

Before you yank on a part hard enough to damage the surface - stick the plate in your freezer for an hour.

That will help.

RE: Buildplate damaged by PETG

I had this problem with PETG and ABS.  I bought the following plate:

FYSETC Upgrade 3D Printing Build Surface

I print ABS and PETG on this and comes right off with cooling.  

RE: Buildplate damaged by PETG

@charles-h13

thanks for the link!

I'll give this one a try and ordered one for my MK3:

https://www.aliexpress.com/item/4000148828753.html?spm=a2g0s.9042311.0.0.72624c4dcqkrHz

Maybe a flop? will see...and report.

RE: Buildplate damaged by PETG

Thanks a lot for all the tips!

RE: Buildplate damaged by PETG

Posted by: @charles-h13

I had this problem with PETG and ABS.  I bought the following plate:

FYSETC Upgrade 3D Printing Build Surface

I print ABS and PETG on this and comes right off with cooling.  

 

Just to give an update, I have printed for 4 months on this plate and the same ABS or PETG product 3-4 times a day.  I get good adhesion with instant release.  If you have over adhesion with a particular filament, I highly recommend it.  

RE: Buildplate damaged by PETG

Posted by: @charles-h13

Just to give an update, I have printed for 4 months on this plate and the same ABS or PETG product 3-4 times a day.  I get good adhesion with instant release.  If you have over adhesion with a particular filament, I highly recommend it.  

RE: Buildplate damaged by PETG

Posted by: @bobstro

Posted by: @charles-h13

Just to give an update, I have printed for 4 months on this plate and the same ABS or PETG product 3-4 times a day.  I get good adhesion with instant release.  If you have over adhesion with a particular filament, I highly recommend it.  

Just to note that the linked sheet is not sized for the Mk3. Is this on a Mk3, Charles, or a different printer?

 

I can't seem to find that particular sheet in a Mk3 format. I have one of the "golden" textured clone sheets, and it's like printing on friction tape. Not at all like Prusa or TheKKIINNGG sheets.

You are correct.  It does printer differently.  This is black and not gold.  The gold is crap.  

I have found it superior for hard to remove prints on the Prusa TXT sheets.  

RE: Buildplate damaged by PETG

Also Charles - the one you linked specifies not recommended for ABS...

RE: Buildplate damaged by PETG

@robert-rmm200

I see that.  It is identical to the one I am using.  It works with ABS.  

RE: Buildplate damaged by PETG

They must just be concerned about the high temps. Glad it works!

RE: Buildplate damaged by PETG

@charles-h13

Hi Charles, is it fully compatible with the i3 MK3? Will it fit? If so, how to attract it to the printer?

RE: Buildplate damaged by PETG

@peter-c20

It fits and attaches to bed with the magnetic bed.  

RE: Buildplate damaged by PETG

Excellent! Thanks.

Anybody knows what he meant by alcohol? Is Isopropanol 99% fine? Doesn't putting alcohol on heated object cause fire?

https://www.prusamk2.com/how-to-easily-remove-petg-3d-print-from-a-pei-hotbed/

RE: Buildplate damaged by PETG

Alcohol we use is normally IPA. That video just uses it as a lubricant, so any concentration would work.

For cleaning your sheet, you want 91% or better.

His bed was 80 degrees C, or quite a bit cooler than boiling water. No fire there.