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Recently building a new printer, I went with a Wambam PEX system. When I began printing ABS I found it did not stick very well and eventually purchased a new build plate and a PEI sheet since PEX isn't suited to ABS.

Not altering some of the setting while trying to get ABS to stick to the PEX I started printing on PEX which is gripping extremely well...too well. Bed temp may be a few degrees too high, nozzle was giving a little too much squish. I now have several skirts and now the base layer of a ringing tower embedded in the sheet. What is the best way to remove these? I was using acetone on the PEX sheet but I'm told not to use that on PEI.

Just looking for into to clean the PEI sheet, please do not respond on what I should have done, or how to use PEX with glue or whatnot.

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Heat up your bed to the print temperature; maybe even as hot as 100 °C. This will soften the ABS and make it easier to scrape off. It will distort a print to remove it this way, but is good for cleaning.

Less preferred method: Acetone will dissolve ABS but may be rough on your PEI, even causing it to lose its bond. It also evaporates very quickly and is highly flammable. You don't want to breath the fumes. It is now considered a carcinogen.

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    $\begingroup$ acetone may damage the PEI sheet to the point where it no longer bonds the part during printing. $\endgroup$
    – fred_dot_u
    Aug 2, 2021 at 16:00
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Heating the bed didn't help much, but Someone suggested using the flush cutters which pryed it up just enough... to get the bigger chunk off.

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  • $\begingroup$ For me heating the bed helped softening the ABS enough for it to scrape without damaging the PEI. It's not a perect solution but an improvement. $\endgroup$
    – Perry Webb
    Aug 3, 2021 at 13:37
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Update here: even the 105 degrees of the heatbed wasn't enough. Put the PEI sheet in the oven, then the ABS wiped right off with a paper towel. I set it to 180 degrees, but I don't think it even got there.

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    $\begingroup$ Hi, are you the OP (tarnis)? Have you created another account to add an update? If you aren't tarnis, then it doesn't seem much sense to prefix your answer with "Update here"? If you are tarnis, would you like your two accounts to be merged? Also if you are tarnis, then it would make more sense to edit your previous answer to update it, rather than posting another answer. $\endgroup$
    – Greenonline
    Dec 29, 2021 at 17:58
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    $\begingroup$ That was someone else $\endgroup$
    – tarnis
    Dec 30, 2021 at 17:39

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