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Air printing problem, please help.

Discussion in '3D printers' started by fury101, Feb 10, 2015.

  1. fury101

    fury101 New

    Feb 10, 2015
    Likes Received:
    Hi all
    Im a total noob at all this . I have built a Prusa i3 fro a kit. As far as i can figure out everything is set right.

    My problem is that when i send a print to the printer it raises the Z axis to its highest possible height and then merrily tries to print in mid air as opposed to on the hot bed.

    Basically i have molten plastic being extruded at a height of 180mm lol

    Im using marlin as my firmware (please dont tell me to change firmwares)

    Im pretty certain that i have missed 1 or possibly 2 settings.

    Can anyone help me?


  2. Robert Hummel

    Robert Hummel Custom Builder
    Staff Member Moderator Builder

    Nov 14, 2013
    Likes Received:
    Plug your z axis motors in the other direction, unplug turn 180 plug back in.
    That will change the direction your z travels
    Where are your limit switches located ? Pics?
    Mark Carew likes this.

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