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The Hoeken Hand 3D printed Spinning Plate Machine

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Creation's quality: 5.0/5 (2 votes)
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  • 17 likes
  • 2 downloads

3D model description

I present the Hoeken hand! Named after the Hoeken linkage. This is a linkage which converts rotary motion into a curved slow path followed by a quick straight line return stroke. Stick a finger on the linkage and you can wiggle a plate back and forth. Make the finger "open" and "close" by coupling the motion to a 4 bar linkage and you have this nerdy looking mechanism. Essentially the fingers rotate on a path for a period of time, then quickly "open", snap back to their starting position and starts the cycle over. Multiply the mechanism by 5 and stick a plate on top and you have this monstrosity.

I was inspired by the work of Mark Setrakian, (I was introduced to his work by his interview on Adam Savages Tested) but wanted to create something that was powered by a single motor.

This is currently a work in progress I will note the planned upgrades below(if you have any suggestions for updates let me know!):

I am uploading the fusion 360 files in the hopes that people with more artistic talent will both sculpt new fingers and items the fingers can rotate. I am more of a mechanical/mechanism person.

If you do create finger "upgrades" or new things to be rotated, please only sell/distribute those updated parts.

Working purely on the honor system, just don't be an ass please.


3D printing settings

Low infill and 2 shells should be sufficient. The thing that is CRITICAL with this assembly is the pin fits, the whole design uses 3mm pins. I generally use a 3mm drill bit to size for "press" fits and a 3.1mm drill bits for bearing/loose fits. Each part of the mechanism should move as freely as possible since all the friction is 5x.

In terms of additional components each finger requires a few pin to create the joints, as well as a screw and a heat set insert. Below is a list of external hardware
(30) 3x16 mm Dowel Pin
(15) 3 x 24 mm Dowel Pin
(5) 2x12 mm Dowel pin
(10) 3x 5 Dowel Pin
(10) M3x12 SHCS
(10) M3 heat set inserts
(1) Nema 17 Stepper (or similar package DC Low RPM motor)
(1) Stepper driver (or Motor Driver)

3D printer file information

  • 3D design format: OBJ and ZIP Folder details Close
    • Hoeken hand Kinematic Sketch v94.obj
    • Hoeken hand Kinematic Sketch v94.zip

    Learn more about the formats

  • Last update: 2021/11/24 at 00:07
  • Publication date: 2021/11/23 at 05:41

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