Gps drill what off set

[Tucks100]

got a Trimble 750 screen on waas/efnos with easy steer just wondering what offset to run with a 3m Combi Drill didn't know whether to run a 2.90m or 2.95m

 

[PJ Walker @ RTK Farming]

Egnos has a pass to pass accuracy of around 30cm though in the real world over a short period of time it can be better than this. Switch the 750 on 20 mins before you need it as it takes some time to get to its best accuracy. You need to test really so start at 2.90 and see how you get on. Everyone will have different experience so its down to what works best for you. Worth noting that if you switch the system off during the day the lines will drift when you start up again.

 

[Tucks100]

I did about 50 acres of bedridden this year for potatoes and was running it at 10 cm off the right with it was OK. I did not no about drilling with it. It a pain the line moves put not a problem to get it back

 

[Chae1]

I did about 50 acres of bedridden this year for potatoes and was running it at 10 cm off the right with it was OK. I did not no about drilling with it. It a pain the line moves put not a problem to get it back

You'll have to measure it to get it right.

Go down field on autosteer. Stop, measure 1m out from edge of drill. Turn and come back again on same swath. Adjust offset accordingly left or right until its exactly the same distance each way.

Offset and drill width are completely different settings. I run our drill at 4m, with a offset to right of 0.065.

Mine was still running too far to left!

Need to spend more time setting it up in autumn.

 

[Robt]

Ok, Ill try to help.
''Offsett'' is normally the term used when a machine doesnt pull square.
''working width'' is the working width of the machine, This is measured by measuring from outside coulter to outside coulter then adding a half coulter width to the number. So if your coulter are 20cm apart. Add 10cm.
You mentioned working width when saying should you set to 2.9 or 2.95. Generally a mounted combi drill with power harrow will pull straight so wont need an offset on it.
You have to work out the variables to yo which is your signal. (your drill wont grow or shrink during the day, well unless you bend it) so your variable is the accuracy of egnos which is quoted as 30cm+/- over a 15 minute period. So in english that means you could be up to 30cm in the wrong place worst case scenario. Most who use Egnos to drill run with marker out then ''nudge'' the line to t he markers. This keeps it arrow straight and 99% accurate, however... I bet like most you set your markers by measuring them and then giving them a little tap inwards so you dont get wide joints... So bear that in mind.

 

[e3120]

''working width'' is the working width of the machine, This is measured by measuring from outside coulter to outside coulter then adding a half coulter width to the number. So if your coulter are 20cm apart. Add 10cm.

Rob, I have read versions of this miss-calculation a few times here, but expected better of someone as experienced as you. The working width is outside coulter to outside coulter plus a whole coulter width, or the join would be narrow. Any deliberate overlap comes later.

 

[Robt]

Thats a fair point but in my experience the half works better than the whole coulter. With a whole coulter i used to get a wide join on nearly every machine on RTK. With half a coulter it was always spot on .