You have the right idea... just pour the beans through the air from one container to another in front of (or behind) a fan. When the chaff is blown away and the beans are not on the floor, you have the correct distance and fan speed. Its how the chaff was separated from teh wheat in the old days... Green wind power!Originally Posted by 77425158515D7B300 link=1276125334/0#0 date=1276125334
I used the fan method to clean about 25 pounds of the filthiest "sweep" you can find- bits of pop rivets, jute strings, dust, dirt, pebbles, telephone hook up wire, etc. I laid out a tarp and used a high speed fan and just poured the coffee in front of the fan.