Gearbox for turbo oven style coffee roaster
thingiverse
This is the gearbox I put together using a slightly modified herringbone gear system from a wades extruder, for use as the agitator in a turbo oven coffee roaster. All you need is -a pair of 608zz bearings -an M8 bolt (I used a 90mm bolt in my design), with a pair of nuts to lock the drive gear -M8 washer between the 608zz bearing and the large gear -NEMA 17 stepper motor. I used an arduino nano to run a A4988 stepper driver that drove the stepper motor. hope this is helpful for someone
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