Combines R62 cob breakage

In normal conditions, slower cyl speed will break up cobs more. We try to set the concave based on the average size of the cob when compressed. Then run the cyl up to crackage to find the upper limit, then down to power increase is noticed or cob break up occurs then find a medium inbetween - usually from 275 to 350. We also take the front of the grate 2 marks down toward max in corn. As to cob, we have found that we can lower the top screen, chaffer, to the point of shoe loss, then raise it back to just take the crop, then set the sieve, lower screen, to the same or wider - not lower- setting. lowering the sieve to clean cobs will block air to the chaffer . We have made some really clean samples using this deviation from factory suggested settings. Might give it a try.

That's the kind of info I was looking for. We do only enough corn every year to start learning to get it right when we're done. 2 marks towards max from mediumIJ (7_16"IJ) I will try that chaffer setting. Do you use this approach in any other cropsIJ

You may not have the best concaves for corn. Corn concaves have higher wires to help prevent cob from sinking into crossbars to far which may break the cob prior to good thresh. larger concave clearance may keep cob more whole longer to get better thresh. I have raised wires by welding short pieces of wire onto existing wires which helps concave and or seperator grate stay clean and helps prevent busting up the crop. I don't know enough about corn to tell you if it would be best to run another variety for awhile and let that cob that wants to split cure awhile longer or not. Best of luck