Near Intersection of I-35 & I-90 Southern Mn. | Do not go by the map as the ultimate proof of where the sprayer turned On/OFF. With a planter, the recommendation is to dig for seed as it is the ultimate proof. This can be more difficult when observing a sprayer and driving. An observer might help decide if the booms are going ON/OFF at the correct location. Once you get a workable situation be consistent with your procedures for turning around on the ends.
You may purposely desire an overlap on the headlands to insure that all areas get covered. Sometimes operators would rather have a little double coverage rather than risk having an area missed.
As far as lying about the measurements, that will certainly affect the timing. In fact with Ag Leader's SureVacs that I use with my planter, a chart is included giving a suggested "fudge factor" to use to change the actual measurements from the hitch to the application point. This is necessary since the SureVac method of starting/stopping planting requires more "lead time" than other types of seed section control. The amount of extra lead time is dependent on desired population and ground speed since with SureVacs a certain amount of time is needed to get the seed cells refilled. By using a reduced hitch to application measurement, the system "thinks" that the planter is closer behind the tractor and thus engages somewhat sooner.
For the system to accurately turn ON/OFF the boom sections it must "know" the relationship of the boom location to the GPS location. To do this, the system will ask various questions about the measurements compared to the rear axle. The system will then be able to calculate the distance between the Boom and GPS. This could vary considerably with a front mounted boom compared to a rear mounted boom. Be certain to answer these questions as they are stated and not what you assume they are asking. There are also "lead times" for the turn ON and turn OFF points. The combination of these distances, your ground speed and the lead times all affect when/where the turn ON/OFF occurs.
Try to be consistent with your procedure for turning around. Generally the ground speed is reduced for turning around. If one operator speeds up gradually while another speeds up more deliberately the results will vary.
I remember the first year section control came out for planters. One customer reported that it worked great except that he drove School Bus and had his retired brother plant while he drove his Bus route. He said he could tell right where his brother had done the planting because the retired brother was of the old "Stop and Drop" procedure when reentering the field. Stop and Drop was counterproductive to the timing.
Edited by tedbear 4/26/2023 05:33
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Ag leader section control turning off early on sprayer- measurements correct
