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Still working :)

A project log for 3D Printable Robot Arm

A printable robot arm, a little bigger than the usual hobby servo once.

Andreas Hoelldorfer 08/24/2015 at 14:212 Comments

I'm still working on this project ;) but not I've not so much time.

Im currently working on a new version again with steppers (Nema24) and belt drives.

I also tried to make my own harmoic drive:

It didn't worked as I hoped and I spend a lot of time working on it until now but I will close this aproach.

Discussions

Dan Royer wrote 08/24/2015 at 18:04 point

I spent $3k on designing a gear drive before I figured out it's a no go.  My two-stage hypocycloidal reduction was losing so much efficiency (even milled in metal) that it would never work.

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Andreas Hoelldorfer wrote 08/24/2015 at 18:59 point

Well the efficiency is kind of ok, but my harmonic drive was wobbling and jumping in the movement. 

Next approach Nema24 stepper and 2 stage timing belts. 

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