#1.   Definitely check if your globe is centered.   BTDT

#2      Is the tractor 2wd or MFWD?     What is doing the steering?   Hyd?  Ez Steer?  Ez Pilot?     When you are engaged on the line do you always have 2 or 3 green lights (preferably 3 green lights) in the center of the light bar at the top of the screen?

#3  You should leave the planter out of the ground and drive a little ways with the steering engaged on a line.   Turn around and drive back on the same line and see if your tractor drives the same tracks.  If it doesn't, you have something wrong in the settings.      If it does, wait 20-30 minutes (make sure the screen stays on) and then try driving the same line again.     If it doesn't, then its probably a drift issue which brings up the question, what are you using for a signal?     WAAS?   Rangepoint?   Centerpoint?   RTK?     Anything less than Centerpoint or RTK is going to be susceptible to noticeable drift and the only thing you can do about it is either spend more money on your signal or use the "nudge" button.


#4   If the tractor drives in the same tracks both ways 20-30 minutes apart, now try doing the same thing with the planter in the ground but preferably not dropping seed.     You want to go back and forth on the same line both ways to see if the planter is pulling to one side or the other.   If it is not pulling straight behind the tractor and is consistent in doing so, this is when you would enter an offset to compensate.



There's a lot of smart people (not me) on here that know these systems but you have to give them enough information to help you.