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LeMotan
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Re: stickered spring steel build plate durability

Sun Dec 03, 2017 8:02 pm

New movie showing the PEI spring steel bed.


neal.w2
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Re: stickered spring steel build plate durability

Mon Dec 04, 2017 4:38 pm

Can you add a PEI sheet to the back of the textured plate to get the smooth or textured finish just by flipping it over?

Neal

gz1
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Re: stickered spring steel build plate durability

Mon Dec 04, 2017 11:47 pm

Guys, if you are worried about PEI sheet being damaged by your scrapers, knives, shivs, pickaxes, or other medieval instruments... THEN STOP WITH THAT STUFF.

Materials are more flexible when they're thin. A thin sheet of PEI will flex more than a thick sheet.

You only need to flex the plate enough to initiate the break from the print.

After that it shouldn't take more than floss to separate it.


As usual, be gentle, precise, and deliberate.

eric.z2
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Re: stickered spring steel build plate durability

Fri Mar 16, 2018 11:11 am

I've had my MK3 with the PEI spring sheet for about two months now. I've done lots of prints in PLA and PETG. The other day I did a PETG print and when I flexed the sheet to take off the print, part of the PEI broke off and was stuck to the PETG. Is this expected to happen over time? For now, I'm flipping the spring sheet to use the other side (it is double sided).

One thing I noticed, when I typically take off a print the steel sheet is still warm (40C or so) and the prints come off fine. The other day, the sheet was cooled down (about 19-20C).

I almost never use a tool to take off the prints, flexing is more than sufficient. Sometime I'll use a the supplied spatula to get the brim or starter filament off the plate, but do so very lightly.

So will I need to replace the whole PEI spring sheet? Or is it possible (less costly?) to replace the PEI? Which of this options is recommended?

gustavo.s2
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Re: stickered spring steel build plate durability

Fri Mar 16, 2018 12:33 pm

when printing petg you nees to use a layer of glue stick ou blue tape, since the adesion is huge with pei... prusa says you can use windex (window cleaner) also....

gustavo.s2
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Re: stickered spring steel build plate durability

Fri Mar 16, 2018 12:37 pm

For the MK2 bed there is this replacement part: https://shop.prusa3d.com/en/3d-printer- ... ultem.html


maybe you can use the same method to resurface the flex sheet... buying a new one is not a option yet... they are only for new printers... not avaiable yet to buy

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