The Combine Forum banner
1 - 10 of 10 Posts

·
Registered
Joined
·
14 Posts
Discussion Starter · #1 ·
the concave in my new cr doesn't seem to calibrate correctly. dealer sets the concave at 1 inch like the book says and hit calibrate. open or close the concave and then return to the 1 inch setting but the concave is not at 1 inch. can be anywhere from 3/4 to 1 1/8. have replaced the potentiometer but does the same thing. when you close the concave to the stop where the concave is at about 1/8 the display will say 9/16 or so. it varies but never 1/8. any ideas? how can you calibrate something at only one point? shouldn't you be able to tell it where zero is and where all the way open is? any help would be appreciated.
 

·
Registered
Joined
·
3,058 Posts
I think you have to set your concave opening at 1/4" then stick 1/4" key stock in the concave and adjust so it fits tight. Then it should be true reading. Have to do that at front and back and both sides to do it properly. That's how my dealer did a combine they brought out for demo that wasn't reading properly
 

·
Registered
Joined
·
65 Posts
I think you have to set your concave opening at 1/4" then stick 1/4" key stock in the concave and adjust so it fits tight. Then it should be true reading. Have to do that at front and back and both sides to do it properly. That's how my dealer did a combine they brought out for demo that wasn't reading properly
That sounds correct to me. We have been setting our own concaves this way for years.
 

·
Registered
Joined
·
14 Posts
Discussion Starter · #4 ·
is that the way to do it in older machines? mine will not allow you to tell it where you are setting it. the combine tells me to set is at one inch and then hit the calibrate button in the Intel iView 4. I don't think I can set it at 1/4 inch and then tell the combine it is at a 1/4 inch. that would be the nice and easy way but the engineers like to make things harder than they need too.
 

·
Registered
Joined
·
3,058 Posts
Shouldn't have to tell combine anything. Set to where combine thinks is 1/4" and adjust manualy to 1/4" on turnbuckles on concave
 

·
Registered
Joined
·
26 Posts
The calibration settings are different depending on machine. They are either set at 1" or 15/16" or they will tell you 25mm or 24mm. Never are they set to 1/4" for calibration. The sieves are calibrated at 1/4" I know for sure. One thing to check is to make sure you are calibrating with the correct concaves. Round bar or bar and wire. Make sure concave type is set right before calibrating also.
 

·
Registered
Joined
·
1,667 Posts
I set mine at near zero condition. I found the high bar, on both sides and marked it. I had removed the section of the concave so I could access good and inspect. I believe my concave was reading 1/8" according to software. I adjusted concave with turnbuckle so I physically had an 1/8" clearance to match the software. I don't know what kind of software calibration you are doing nor what is the significance of that calibration at 1". Maybe mine didn't need calibrating - I just made sure the rotor would never contact the rotor at worst case and the numbers seemed to be able to come up okay.

At the same time, don't forget to look at the parallelism, etc. to make sure that rotors are not skewed to the concaves. My "high bar" looked fairly close. I went in with feeler gauges to determine - just can't remember how much variance I found. I know I always referenced the same concave bar and turned the rotors by hand and marked with a paint marker.
 

·
Registered
Joined
·
26 Posts
Are you talking about calibrating or setting the minimum clearance? On the minimum clearance you should bring the concaves up till they tough the rasp bars and back them off just a hair then set your double nuts tight up top by the concave control motor.
I work at New Holland Dealership and set these up all the time!
 
1 - 10 of 10 Posts
Top