A few updates from this weekends work...
Attached the natural rubber to the floating roller and passed the millet through 2 times. We are having some trouble getting the sheet rubber to stick to the roller and are going to special order some natural rubber that is formed in tubes, so we can stretch over the rollers and tack down. This should stop the rubber from lifting.
Even with the rubber sheet issues, wrapping the rollers has resulted in a significant reduction in broken grains.
Also mocked up a smaller feed area on the current hopper. This helped even the flow of millet into the rollers.
We are still dialing in the winnower, and need to find the right fan and speed to blow the chaff out of the system. On the left is the raw millet. On the right is the threshed millet after 2 passes and a few fans with a piece of cardboard.
Next steps, in order of importance
1. Wrap rollers with rubber tube
2. Re-build frame from Plywood rather than OSB
3. Integrate winnower
4. Incorporate gears and chain if possible