Prusament ASA sticking too well on PEI sheet  

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cwbullet
(@cwbullet)
Illustrious Member

I have a textured sheet that has pulled some of the surface off.  It tends to stick too much now.  It is about 3 years old.  I have saved it for certain hard to stick filaments.  

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Chuck H
3D Printer Review Blog...
Posted : 22/02/2021 3:34 pm
karl-herbert
(@karl-herbert)
Illustrious Member

@protoncek-2

I filled the defective areas on the PEI shett with 2 component epoxy glue and sanded the repaired areas clean flat.
I have made a short manual here (only in German language):

PEI-Platte-Reparatur-mit_Kapton

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 22/02/2021 4:10 pm
tonitom
(@tonitom)
Active Member

ohhh, the new satin sheet is in stock. Maybe this is the solution. I ordered it at least.

 

For me the list was new, maybe there are more who will find it helpful.

 

I was able to use this solution:
PETG as the first layer, peeling went well and surface is very flat and without warping.

 

Tonitom

Posted : 22/02/2021 4:15 pm
Protoncek
(@protoncek-2)
Active Member

Nice guide, thanks!
Back then when i’ve had delta printer i used abs-acetone solution which i put on kapton as preparation. I never had to use any kind of glue. 

Posted : 22/02/2021 4:22 pm
christian.ho
(@christian-ho)
Trusted Member

Finally, I printed ASA again.

Just quickly my findings:

- Brand: Fillamentum ASA

- Printer Mk3S in an enclosure, temperature goes up to ~40°C

- Sheet: Textured steel sheet from prusa

Prints:

1) flat object, ca 15cm x 10cm

-> failed due to warping (corners came off)

2) smaller piece ca 10 cm x 3 cm

! Added 5mm brim to avoid the corners lifting off

-> worked well

3) two pieces 12 cm x 5 cm, 9 cm x 8 cm, again with 5mm brim

-> worked well, too!

 

For print 1+2 I struggled a bit to get it off afterwards.

In the third attempt, I took the build plate out immediately when the print was done. As soon as I heard the crackling sound (part coming off from build plate?) I flexed the plate a little and the print really popped off easily.

 

Summary: ASA + Textured Sheet + Brim works well so far. Cool down before taking the print off.

Posted : 09/05/2021 11:12 am
cwbullet
(@cwbullet)
Illustrious Member

@christian-ho

Good to know.  I am going to have to try a brim on ABS-T.  

With ASA, I have not needed one.  I switched plates and ASA sticks well again.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 09/05/2021 1:44 pm
christian.ho
(@christian-ho)
Trusted Member

I think I should add two more pieces of information:

- I am not very experienced in printing ASA. (Printed 7 parts so far, one failed due to warping)

So maybe, the things that I changed did not cause the success after all. I did not do testing brim vs no brim under otherwise identical conditions. Maybe doing a rain dance would have yielded the same results after all 😉  And never forget about Dunning Kruger 😉

- The part that lifted off had a very narrow contact area on the printbed, and on top of that, chamfered edges. I guess that makes warping more likely.

 

However, I thought and still think is is valuable to know a combination of settings, conditions,... which gives good printing results.

Also: I am printing a huge ASA part right now. It is 262mm long and mostly only 9mm wide. So far (75% done) the print is going flawlessly. I will post a picture once it is finished.

Posted : 09/05/2021 2:42 pm
cwbullet
(@cwbullet)
Illustrious Member

@christian-ho

Warping is less but still common with ASA.  I have had it warp off the bed and supports.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 09/05/2021 2:49 pm
christian.ho
(@christian-ho)
Trusted Member

The print did come off the bed during the print. However, the part is usable. I think that is thanks to the rim. It seems like the rim kept it in place so the print could finish.

I guess i was really pushing my luck here 🙂

 

Posted : 15/05/2021 1:51 pm
cwbullet
(@cwbullet)
Illustrious Member

@swiss_cheese

I share your findings.  Windex is rarely needed with the textured,  Only a few brands seem to need help preventing over adhesion.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 15/05/2021 4:42 pm
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