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Never print ABS or ASA on an open printer

Corners lift, then the whole base peels, because ABS is on an open printer as if it were PLA. Cold air makes it shrink, and uneven shrink pulls the corners up. ABS and ASA want an enclosure and the part fan off. If the printer is open, print the part in PETG.

Tips & TricksPrinters 0:53

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How to stop ABS and ASA from peeling off an open bed

  1. 1 Open-air ABS peels

    The corners lift, then the whole base comes off. That is ABS printed like PLA. Cold air hits hot plastic, the ABS shrinks as it cools, and uneven shrink pulls the corners up.

  2. 2 ABS and ASA need a box

    They need an enclosed printer, not a P1P or an A-series. Snapmaker says keep the cover on and the door shut. An open environment is where ABS warps or cracks.

  3. 3 Part fan off, door shut

    Print ABS and ASA in a closed box with the part fan off. Prusa wants the enclosure so the air around the part stays hot. A breeze on the first layers is the peel.

  4. 4 No enclosure means keep your distance

    If there is no box, do not stand over the printer. The fumes are toxic. The backup is the same part in PETG on the open bed, which does not need that enclosure.

FAQ

Why do ABS corners lift on an open printer?

Cold air hits the hot plastic. ABS shrinks as it cools, and the shrink is uneven, so the corners pull up. Then the whole base can peel.

Can I print ABS on a P1P or an A-series?

Bambu says ABS, ASA, and PC need an enclosed printer and are not for the P1P or A-series. Those machines are open. Use an enclosed printer, or print the part in PETG.

Should the part fan run for ABS?

No. Print ABS and ASA in a closed box with the part fan off. Snapmaker says keep the cover on and the door shut for the whole print.

What if I do not have an enclosure?

Do not print ABS or ASA there. The fumes are toxic, so keep your distance from an open machine running them. Print the same part in PETG on the open bed.

Full transcript

You start a print and the corners lift. Then the whole base peels. You are printing ABS on an open printer as if it is PLA. Cold air hits hot plastic, so the ABS shrinks as it cools. Uneven shrink pulls the corners up. ABS and ASA need an enclosed printer, not a P1P or an A-series. Snapmaker says keep the cover on and the door shut. Print ABS and ASA in a closed box with the part fan off. If there is no enclosure, keep your distance. The fumes are toxic. For a backup, print the same part in PETG on the open bed. Once the material matches the printer, Obloid's AI part splitter turns a big model into small parts.

Sources

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