It’s fully functional and running 🙂

Its getting power over cable to save batterylife and make it easier to test. I resoldered the powerplug to instrument cable plug to make it easier to extend the line.

The white roll is powered by a 540class motor with 30:1 gear-ratio. The black scooterwheel is free running. The metal “roll” are three ballbearings stacked together with a small shim in between. The cable runs over the two bearings. The third bearing functions as a distance holder 🙂

All white metal parts are leftover parts of a ceiling-mount set of a beamer






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