Inverted Prints



  • Objects that are being sliced are inverted. I am testing using the characters "FP" as they are not symmetrical in the X and Y axis. I have tried about every variation of switching build plate access tables in slicing software and have not been able to print correctly.

    My goal is to print what is shows in the slicer.

    What the slicer shows: https://prnt.sc/to2ijf
    What the print actually does: https://prnt.sc/to2iea

    Video: https://www.youtube.com/watch?v=KxUxwsNI_KQ (4min)
    All files: https://drive.google.com/drive/u/1/folders/1hy_727zHfWHaTKsb6Cgkd8AVHZ51e3z8

    Board: Duet 2 WiFi (2WiFi)
    Firmware: RepRapFirmware for Duet 2 WiFi/Ethernet 3.1.1 (2020-05-19b2)
    Duet WiFi Server Version: 1.23


  • administrators

    The most likely explanation is that you have set up your machine to have a left-handed coordinate system.

    You have a right hand coordinate system (the correct one) if, looking down on the printer, the +Y direction is 90deg anticlockwise from the +X direction.

    The other possibility that I know of is that you are using Simplify3d to generate your GCode. For some strange reason, S3D requires you to check the Y box under "Flip build axis" to generate correct code for a right-handed coordinate system (and warns you if you don't).



  • I bet it's the Simplify3D thing.

    Time to move to PrusaSlicer! 🙂


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