Sega Single Motor Dual Extruder

The is my dual extruder with only one extrusion step motor for 3d printing. Now is a working prototype.

3D printer parts and enhancements

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    # SegaSingleMotorDualExtruder

    The is my dual extruder with only one extrusion step motor for 3d printing.

    Now is a working prototype.

    Most dual extruder needs two step motors for each hotend to do the job.

    But i think it's way too heavy for an extruder.So I try just use one step motor to do the job.

    The other problem with dual extruder is when one hotend is working, the second would cause ooze.

    Ooze will make printing model caught a lot of unwanted results.

    My solution is letting the second hotend to dock on a metal plate to block hot plastic drops from nozzel.

    To do that first the second nozzel need to swing and raise above metal plate.

    At the same time one filament need to be caught in between idler and extrusion gear teeth with enough pressure.

    This project have to design a brand new extruder and different firmware to acomplish goals above.

    PDF files contain 3d model, can be views by adobe acrobat reader.

    Current firmware is derived from Marlin (

    branch: SingleMotorDualExtruder

    About model file names, I am not sure those names are right. If there are any suggestion, feel free to leave any comment.

    Here are some videos of how it operates.



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    Mini fatboydicklaw795 added this to the 3d printer parts collection ago
    Dfe5d99e6e5229932c9d918febcd48e0?default=blank&size=40Chema added this to the extrusores collection ago
    200b4400f962c8de6d7b01d75a4722f2?default=blank&size=40Serhiy Lonko commented ago

    Now busy with development of such design. What total weight you got?

    Mini imageRflynn added this to the 3D printers collection ago
    1d6a9dcb8b625b5af891f7e09c151bfb?default=blank&size=40tehmaze added this to the Dual extruder collection ago
    B3275571d5a5065d9647953a3b7773bb?default=blank&size=40Brer_Rabbit420 added this to the 3-D Printer Upgrades collection ago
    24ee2577539ae18c4b0af758a9234ad4?default=blank&size=40Tongdam added this to the Extruder collection ago
    Mini 1395886 10152720859248625 1583490715380704624 nliusega published this design ago