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hreedijk

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Posts posted by hreedijk

  1. I've done it this way on my own build UM (still work in progress):

     

    From top to bottom:

    > 4mm Heat resistant glass plate (print surface)

    > 4mm Aluminium plate (to spread the heat equally to the glass)

    > MK2A (taped it with kapton on the alu plate)

    > Heat insulation foil

    > Bed level springs

    > Aluminium plate which is connected to the bearings of the 12MM rods.

     

     

    On my UM original I have the following:

     

    From top to bottom:

    > Ikea mirror (print surface)

    > MK2A (screwed into a wooden plate)

    > Heat insulation foil

    > The wooden plate

    > Bed level springs

    > Original UM Z arms

     

  2. I'm always printing with PLA from Faberdashery, PLA/PHA and XT from ColorFabb on my UM1, unfortunately no experience with the UM2 yet :-| .

    Like gadgetfreak already said, it's a little bit tricky to switch from XT to PLA.

    When I switch from XT to normal PLA or PLA/PHA, I always use the same procedure:

    Set the hot-end to 240, extrude a little bit of XT by hand or UM controller, change the XT with the other filament, extrude the filament only by hand (carefully !) until a tiny bit of XT is coming out of the hot-end.

    At that moment you can notice that the XT is already coming out more slowly then before the filament was changed.

    Then I print a 2 wall thick 80mm diameter circle with the speed of 50 and a hot-end temp of 240.

    (That circle a gcode file I always use to change filament, instead of extruding buy hand or UM controller until the other filament comes out of the hot-end, I'ts easier, quicker and more safe.)

    When I see (while printing) the other filament is coming out of the hot-end, I reduce the hot-end temp to 230.

    After a few layers (7 to 10) I reduce the temp again, now to 220.

    I keep that running for a minute of 3 to 4.

    Since XT came out I print one spool a month with that great stuff, and about 2 spools of PLA - PLA/PHA.

    I change from XT to PLA 2-3 times a week, always followed the above procedure and never had any clogs.

    I'm not saying this is "the way" of changing from XT to regular PLA, I'ts only my personal experience I'd like to share.

     

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