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JD Duallie Belt Driven Dual Extruder

This is a belt-reduced non-bowden dual extruder, with care taken to allow flexible filament use. It has a tight 17mm nozzle interval, can probably be made under 500g. This was designed first around the Ord Hadron X carriage, and adapted to MendelMax 2 X carriage. Other mounts are possible.

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I tried my best to minimize the weight penalty over many non-bowden single extruders. I believe I can have a working unit under 500g. The first working prototype is 600g, including hot ends and motors. Many direct drive single extruders are in this weight range, making the weight penalty of a second direct drive extruder negligible.

Care has been taken to allow for flexible filament use, a straight path with minimum seams & joints, and no room to buckle.

Filament idler pressure is easily adjustable, and there is a "bird nose" quick release to allow visible access to the hobbed pulley or to quickly switch materials.

I designed around an Ord Hadron carriage, but with a simple mount plate, it will also mount to a MendelMax 2 carriage using a different groove mount plate, see my other designs in my account.

This is a work in progress, but I have had about 40 hours of successful operation. The photos represent my first prototype, the drawings represent improvements based on use.

Videos of the design running:



On an Ord Hadron, it requires no modification to the carriage, and only a little adjustment to the X limit endstop. It still allows 196mm of full dual extrusion X working width. Mount plates for other machines should be coming soon.

Materials and methods

See the BOM spreadsheet in the documents section.



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6a6a2c0f50b667e4badc06c5a2bb2c46?default=blank&size=40Dwyndal added this to the Extruder collection ago
76652674c3ddbb662044858c1baa3c79?default=blank&size=40dintid added this to the UM2 collection ago
7cadc3479352d8d9dd46a47ddea8df1f?default=blank&size=40housefly88 added this to the Extruders collection ago
24ee2577539ae18c4b0af758a9234ad4?default=blank&size=40Tongdam added this to the Extruder collection ago
3827b9da70d70822e973fa17252f92fe?default=blank&size=40JDM published this design ago