Ez pilot & fm750 RTK help

[ted1060]

Hi , need some advise , just recently acquired an ez pilot and fm750 screen with rtk. I am having a lil problem engaging on the line is the any tips to make this easier? Also when drilling it will drift offline anything from 0.01 to 0.04 is there any adjustments I can make to keep it bang on line. Sorry all new to this . Many thanks

 

[SinisaB]

For the first question: just practice. Cross track error depends of calibration. Have you got straight rows?

 

[ted1060]

Lines look fairly straight yeah , just feels like drill is twitching side to side a little. I was under the impression It stayed between 0.00 + 0.02 on rtk. On engaging online do you suggest narrowing the distance / angle it will engage, so it will only engage closer to the line so you don’t get a dog leg at the start if not bang online.

 

[Si85]

not sure if it will help but with engaging I sometimes find having the tractor a degree or two off the direction you want to go helps it get on line quicker than been bang on-line and obviously engaging as soon as possible while turning. also increase online approach %.
For the twitching side to side I know people have used different ways to try and make it better they are altering:
online aggressiveness
turns per angle on the steering
antenna to axle measurement
but I reckon to keep 0.02 and below it needs to be a autopilot system not ez-pilot.

 

[clbarclay]

I was under the impression It stayed between 0.00 + 0.02 on rtk.

The error from the correction signal is not show on the screen. That 0.04 is distance from where it thinks the swath line is to where it thinks the tractor is. If you used a less accurate correction signal, the screen can easily be showing the same thing, but both the swath line and tractor could be 6" away from where you want them to be. That 0.04 is just down to the steering response.

 

[ted1060]

O I see , to be fair it has stayed pretty much on the mark where I would be drilling, I just get a few s marks in field and at starting off . People have suggested a re calibration with I have done , my angle per turn went from 15.8 to 14.9 and I had been using 127% online aggression so now tht needs to be lowered I guess !! Just need some days where it don’t rain so I can try again!! Many thanks for your help

 

[e3120]

I'm also learning 750 & ez pilot, albeit rangepoint. Had it fairly good mowing but was unusably wiggly for drilling. Think it's the looser surface that changes the behaviour. Dropped the angle per turn down to 12ish from 14 something and much better. I suppose the right thing to do would be to a calibration with front press & combi in the ground for it to learn, but don't know if that'd work. Land certainly was not up for such buggering about this year - one pass was your lot.

 

[Matt77]

A bolt on system will probably never be as good as a factory fit, I’ve both and the bolt on takes longer to find line and stay on it too, but it’s on a 4ws sprayer so might make a difference. Something I think I’ve learned over the years with both, is less is more at times, wheels motor speed, swath acquisition, aggressiveness etc, putting them on high percentages sometimes is worse, my bolt on works best at 65% aggressiveness but I spent ages thinking a higher number would be better, same with acquisition, too high and it will wiggle till it finds the line, all my systems are on RTK so same signal.

 

[clbarclay]

One of the issues I have found with the calibration of the easy pilot is that steering response in practice can change a lot between being in the yard unladen with no draft forces and in the field with some draft force and wheel slip. I have a few different profiles saved for one tractor and select the most appropriate one depending on whether doing something like fert spreading, light cultivation/drilling or heavy cultivations. I redid the calibration procedure in the field while pulling a stubble rake and got a different angle per turn to calibrating in the yard. If you use something like a front press then I expect this calibration could very different again.

 

[Slick]

A front press will have an effect on Ez-pilot performance, it's definitely worth doing a calibration with the press and drill in work.
Being able to that just now may be an issue though!