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Rotor speed on corn

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What do you guys run for rotor speed on corn? Using a 2388, at 5 mph, 14% and 125 bu corn, rotor at 370 and concave at 4 plus, I am still grinding more than I'd like. I know it's dry and that may be most of the problem. It's going in a bin and the few loads that I hauled to elevator didn't have any dockage. Just curious on what everyone thinks. 

20171028_175403.jpg

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With corn that dry I would have the concave hanging on the bottom and have the rotor down to 330. We are in 230 bu corn at 17% at your current settings with an 8 row head at 4.2 mph. No fines and throwing whole cobs. We have a standard rotor and no chopper, hence the whole cobs. Oh our machine is a 1680.

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I didn't know how far to drop concaves, there is a space between cage and concaves now. Cobs are mostly whole but chopper gets a few. I'll slow rotor more and possibly drop concave. Chaffer is around 1/2", and shoe is a little less. Chaffer could be closed a little, getting a few pieces of trash too. Have heard that running rotor too slow grinds also because cobs can't get out quick enough

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Concaves at 4, Rotor at 300 rpm, 5.5 mph in 250 bpa corn 16% 6/30 Gearinghoff head on 2377.  Not a cracked kernel in the tank.  AFX rotor.  With the grain cart we are getting close to 2000 bushels per hour.

jerry

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Rotor 300 concave at 4.6 2388

 

Shoe sieve needs to be wider than chaffer. 3/4 of inch works good, it also directs air towards your chaffer sieve.

Don't want return elevator sending corn back to get ground. Clean the corn with Chaffer sieve

If I run concave to wide it breaks the cobs up.

Many ways to skin a cat, main thing is we want corn to end up in the bin 👍

 

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