Metal Printed Direct Drive Delta Effector

Minimal Extruder for Delta Bots

3D printer parts and enhancements

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    Description

    Once I moved from printing in PLA to printing in XT, I started to get annoyed by the increased blobbing, stringing, and layer unevenness that came from the compression of the filament in the bowden tube. (XT is less stiff than PLA, which was clearly causing back pressure and reduced retraction efficiency.) Consequently, I started looking for direct-drive options for Delta printers, and the only promising option seemed to be the Ultibots Micro Extruder. Well reviewed though it is, it 1) seemed rather large in Z, and 2) plastic printed extruder components have failed on me in the past, due to the temperature difference between where steppers can operate safely and where plastics can avoid significant creep.


    I also am a fan of Printrbot's geared extruder design, and had previously designed my own minimal housing for it using Shapeways printed stainless steel.
    So, with those parameters in mind, I quickly sketched out a combined hotend-mount, direct drive extruder, and mag-ball based carriage to start down the path of a minimally sized, rugged, precise, highly integrated effector. The result works well and can be cost-effectively printed from Shapeways stainless steel (or likely their other metals, if you prefer, though they are more expensive).

    Materials and methods

    Printrbot UBIS 13 hotend (though any groove mount will probably work)
    Printrbot Gear Head Extruder Gears & Bearings (it seems they may have stopped selling these alone... which would suck for this design. Will ask Printrbot.)
    Ultibots PG35L Motor + Heatsink
    6x - DeltaPrintr Magnetic Balls
    6x - 10mm M3 Screws
    2x - 16mm M3 Screws
    2x - #4 Thread Rolling Screws (design ought to be modified to use nut-traps and M3's here, in retrospect...)

    Documents

    • Placeholder
      Magnetic Printhead Assembly
      ZIP  β€“  12 mb
      Version 1 - Sep 20, 2015
    • Placeholder
      Magnetic Printhead Assembly
      STEP  β€“  3.4 mb
      Version 1 - Sep 20, 2015

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    Comments

    Mini sp logo grain 400x390Stamos added this to the Delta 3D Printers collection ago
    Ef86e8cf681571fb8671004bdbce8883?default=blank&size=40Mshievitz added this to the Delta Printer Upgrades collection ago
    942d1861e5880c6d9d166ae3985dab42?default=blank&size=40UltiBots commented ago

    Taking it to the next level!

    Mini dsc06896 1nhfoley published this design ago