Here is a picture of the oats traveling over the top screen. This screen removes larger pieces of chaff and straw. These screenings slide down the chute to the right which I collect in a pail than discarded.
The grain falls through the openings in the screen down into the cleaner where the grain passes over 2 smaller screens separating the grain seed from weed seed.
This picture shows just how much weed seed and chaff the cleaner can remove. This day I cleaned 14 tonne consisting of wheat, barley, oats, and soybeans. The pails and bags are full of chaff,weed seeds and light immature kernels of grain.
The chaff and light seeds on the ground are what the fan blows out. Fortunately cleanup is the responsibility of the customer. I try my best not to make too big of a mess.
Colin