75mm Harmonic Drive (-1:26.5 ratio)

Description
This is a design for a harmonic drive (AKA Strainwave gear system) that I am putting together for a robot telescope idea. The drive is based heavily on the Keen-One harmonic drive-based equatorial mount by KEN. While excellent, KEN's drive was far too big and heavy for my plans, which are to put a very small and very cheap scope on a fully robotic EQ mount to leave outside as an autonomous scope for night sky mapping.
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