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Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

Bicep Stepper

by lothar22, published

Bicep Stepper by lothar22 Feb 13, 2013

Description

Derivatives for servoholderV1, PistonanticlockV1 and PistonbaseantiV1.stl for using a stepper motor instead of a servo.
Changed the pitch of the screw, as it was too steep for the stepper.

Video of bicep (and hand) in action.
youtube.com/watch?v=3YqRp2ihkjU




Recent Comments

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Updated the stepper holder...
Didn't lose or gain anything on retraction. Just can't extend fully, but it's not much at all, maybe a few degrees.

Still working on the software. My mad scientist friend is coding it from the ground up. He built the printer board from scratch, starting with an ARM microcontroller and a breadboard. Steppers are NEMA 17.
Wow nice! I would love to see a video when ready on software. Did you
gain or lose, when the arm is totally retracted? You say you are going
to limit the extension, so I would guess you gained retraction. What
stepper Nema did you use?

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License

Bicep Stepper by lothar22 is licensed under the Creative Commons - Attribution license.

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Instructions

Print stepperholder and StepperPistonbase at normal infill. I use 20%. Print stepperdrive at 100% infill.
No support needed.
Updated the stepper holder...
Wow nice! I would love to see a video when ready on software. Did you
gain or lose, when the arm is totally retracted? You say you are going
to limit the extension, so I would guess you gained retraction. What
stepper Nema did you use?
Didn't lose or gain anything on retraction. Just can't extend fully, but it's not much at all, maybe a few degrees.

Still working on the software. My mad scientist friend is coding it from the ground up. He built the printer board from scratch, starting with an ARM microcontroller and a breadboard. Steppers are NEMA 17.
Sweet! I was just thinking about using steppers in some places when I finish my printer and start working on my own inMoov build.
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