Combines 1680 throwing milo over chaffer

[Farm_Kid2]

Are you using the grain monitor to determine that the grain is coming over the chaffer rather than the rotorIJ I assume that it is a fixed air foil chaffer, no adjustmentIJ Does the loss go down if you slow downIJ

 

[plowboy]

Yes, the loss goes down if I slow down. Does this indicate a rotor loss insteadIJ Should I be cranking up the rotor speed and_or slowing the vane over the last grateIJ

 

[Farm_Kid2]

The fixed air foil chaffer has a lot of open area for the grain to fall through, so it is hard for me to imagine that you are walking it out the chaffer. I suspect what you are seeing is rotor loss, but that is just a guess. You should definitely slow the vanes down to allow more separation in the rotor. I would probably slow them all down, not just the ones at the rear. If that doesnt do the trick I would start taking the cross bars off the rear grates (I assume you have slotted grates rather than keystocks) and work forward until the rotor loss gets down to an acceptable level. Of course, if you are really loosing it over the chaffer, all of these things will just add to the problem because you will have more MOG on it. Good luck, Mike

 

[trump]

What and where are these "vanes" you refer tooIJ Excuse my ignorance. but I'm new to this rotary concept. ..TIA.............................Mark

 

[Farm_Kid2]

It may help to think about the rotor cage divided into 4 sections. Imagine cutting it in half horizontally (so there is a top and a bottom) and in half vertically so that there is a front and a back. To make things simple, the rotor threshes in the front-bottom quadrant (concaves) and separates in the rear bottom quadrant (grates). On the top half of the rotor cage the material is progressed toward the back of the machine. The pieces that move the material rearward are called vanes. The angle they are at is adjustable. The more angle you put them at, the faster the material is moved out of the rotor and the less time it has to thresh and separate. Does that make some senseIJ

 

[trump]

One more question. Are the vanes on the rotor, or are they fastened to the cageIJ ............................Mark

 

[John_W]

The vanes are on the top of the cage.

 

[tj]

I'd suggest a power shutdown to determine where you're losing milo. If you find much grain on the beater pan, it's probably rotor loss. If you find grain on the rear axle and strips on the ground which are heavier than other areas, the chaffer may be overloaded and walking grain over the rear end. Grain on the ground spread at about the width of the shoe usually indicates that you're blowing it over. This last condition may not show up on shoe monitors since blown over grain will usually arch above the monitors.