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matter controll rafts...wont remove

Discussion in 'Software' started by fredm, Jul 2, 2017.

  1. fredm

    fredm Member

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    I never had a problem with rafts before. they used to peel away easily.
    now they are melted to the part.
    dont know if maybe I accidentally changed a setting...airgap?
    or its something else.

    what are other causes of this?
     
  2. Geof

    Geof Volunteer Moderator
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    I dont often print with rafts, but matter control is very hit or miss. Airgap would increase the "space" between the raft and your part, assuming its not a slicer fail you may want to ensure your printing at the correct temperature as well.
     
  3. OutsourcedGuru

    OutsourcedGuru Active Member

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    I slice with Cura and always with rafts (no heated bed) and most (taller) parts behave great but the last two coins were a real pain to de-raft them (relatively thin parts @ 2.5mm high plus 7 layers of raft, I'd guess).

    On thin parts, if you wait until the part is room temperature it seems to break-away easier from my experience. Note to self: chuck it into the freezer to see if this helps raft/support separation.

    I note that the low end for the Robo-branded PLA from the box suggests 185°C but the default for the software appears to be 190°C. I wonder if 185° would be fluid enough to lay down a nice pad and yet promote easier separation.

    The carbon fiber—infused PLA's inherent strength (and 205°C extrusion temperature) means that it doesn't want to separate normally; I've sometimes had to use Count Spatula and striking the end of it forcefully with my open palm in a slicing-from-top motion for that.
     
  4. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    The temperatures listed for any spool are "guidelines"
     

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