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My other holy grail. The co-axial wheeled balancing robot. I've tried this several times. I didn't alwasy keep a photographic record, but here's one of my earlier ones. (And probably the one which came closest to working.) Here is it stripped down. The two MFA motors are brilliant with their built in gearboxes, but they ain't cheap. Thay also work from an irritating 18V, so I controlled them by 3/4 PWM from a pair of 12V home alarm system batteries. The two M8 threaded rods show how high ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/coaxial-wheeled-balancing-robot