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A project log for Strain Wave Gear with Timing Belts

Strain wave or harmonic drive gears are cool. As a cheap analog for metal or flex filament splined cup, try using timing belts.

simon-merrettSimon Merrett • 02/02/2018 at 22:33•3 Comments

This video is a summary of my progress over the last few months. Time to take stock and share. Comments are very welcome but collaborators are even better!
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Hypocycloidal gear with timing belts?

01/26/2018 at 03:42 • 9 comments
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Teardown: rough first prototype HTD 3M hypocycloidal

02/08/2018 at 23:15 • 2 comments

Discussions

samuelpfchoi wrote 02/15/2018 at 05:38 • point

How about backdrivability for both drive, timing belts and cycloidal? Thanks

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Simon Merrett wrote 02/19/2018 at 14:50 • point

Hi @samuelpfchoi , for some reason your comment didn't show up in my feed or emails. None of the strain wave gears are back-driveable. The non-belt hypocycloidal gear was easily back-driveable (11:1 ratio) and the belt version was "slightly" back-driveable but is a 69 or 70:1 ratio. 

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samuelpfchoi wrote 02/19/2018 at 15:37 • point

Hi @Simon Merrett , Thanks, I am really interested the non-belt hypocycloidal gear, its design is very compact. The back-driveability, for me,  is very important factor, Thank a lot of your answer,  I think I will make one too for my experiment.

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