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To cool or not to cool


jotto
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Posted · To cool or not to cool

When should you use the cooling fan, for PLA, PVA and PETG respectively? Always, or only on the first layer? Or not on the first layer?

(In my case, I have an Ultimaker 3)

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    Posted · To cool or not to cool

    I use this on an UM2:

    - PLA: always on. Bed at 60°C.

    - PET and NGEN: off when the model allows it (e.g. a thin flat model without overhangs), then it can be printed on bare glass. On at 40...50% if required to prevent overhangs from sagging, but then it requires bonding aids (dilluted wood glue or so) to prevent warping. Bed at 80°C.

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    Posted · To cool or not to cool

    I use this on an UM2:

    - PLA: always on. Bed at 60°C.

    - PET and NGEN: off when the model allows it (e.g. a thin flat model without overhangs), then it can be printed on bare glass. On at 40...50% if required to prevent overhangs from sagging, but then it requires bonding aids (dilluted wood glue or so) to prevent warping. Bed at 80°C.

     

    Thanks a lot!

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