JWK
Guest
If you have the slotted grates, put them in, this can help out to reduce cob breakage. Have you tried to increase your ground speed up to 4 to 4.5 mph to see if that helps. The rotor is like to old corn shellers, where you had to keep them full to do a good job. Sieve setting, change one setting at a time, if you have long finger sieve you can open front and close back to give you more air pressure under the sieve. Your fan speed is good.