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wondering what concaves you guys run in oats. The past 2 years I have used large wire but I finding I get a lot of straw in my sample this way. Anyone running small wire or partially small wire?
 

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On our 1680's and now our 2388's we always run the first concave small wire then a large wire then a small wire concave with half the wires pulled out on the rear part . This way we can get the large wire advantage by only changing the center concave .It seems to us that oats won't fall through the small wire fast enough and then you get rotor loss . With sticks in the sample it could be that the chaffer is a little too open . But closing the bottom sieve too much will just overload the sieve and give too much return . we run the concaves at 3 and the rotor at 750 .
 
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