Trimble 750 weave

Running a 750 through NH autosteer on egnos and when I'm spraying at 5kph it's perfect, however it seems to develop a weave when fertilising at 12kph,. What needs tweaking to make it behave?

Thanks
 
Last edited:

B'o'B

Member
Arable Farmer
Location
Rutland
Running a 750 through NH autosteer on egnos and when I'm spraying at 5kph it's perfect, however it seems to develop a weave when fertilising at 12kph,. What beads tweaking to make it behave?

Thanks
Have you tried changing the aggressiveness setting?
It sounds like it might be a bit high for the higher speed
 
Last edited:

clbarclay

Member
Location
Worcestershire
Are you using a wheel motor or a hydraulic valve with the 750?

Using an ez-pilot wheel motor, I have different profiles saved for certain jobs. The main difference is the steering angle per turn. The auto calibration of it is fine for jobs with no draft forces (fert spreading), but for cultivation the draft forces affect the tractors steering and It needs a lower steering angle per turn to compensate for the 'slip angle'. I have run the calibration in a field with a stubble rake on and it worked out the angle per turn at something like 13.5 degreees compared to 15.2 degrees for the same tractor without an implements or ballast and on firm concrete.

When I tried using the 13.5 degree setting for fert spreading with the agrression turned down it could be fine untill a small bump unsettled the tractor and suddenly it would be turning sharp side to side and never settle down again untill I slowed right down.
 

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