Near Intersection of I-35 & I-90 Southern Mn. | The hyd drive would continue to run at the "normal" speed based on mph alone. Since the product is still being delivered to the full width, the product needs to be delivered at a rate to satisfy those areas that have not been applied.
Here's my reasoning: Suppose the rig goes to 1/2 of the full width. No problem on the liquid side, 1/2 the booms would be shut off, the control valve would cut the the flow rate (not applied rate) to 1/2 and the applied rate on the side that needs application would be correct.
The dry side is either On or Off since it is just one section. When the rig goes to 1/2 of the full width. The Hyd valve still needs to run at the full width rate. This would assure that the unapplied half gets its proper rate. Granted the other 1/2 (lapped area) would be getting that rate also which would result in doubling on that half. This is a limitation when taking less than a full swath with a one section rig.
Lets suppose that the hyd motor went to 1/2 speed in the above scenario. The entire width would get 1/2 the desired applied rate. This would mean that the lapped applied area would be 1 1/2 ( 1 from the original pass and 1/2 from the next pass) of normal but the unapplied area would be 1/2 of what was desired.
This actually happens with a liquid rig with several sections within each section. Generally the boom stays ON until that entire section has been applied. This results in some "doubling". The answer is more boom sections with the associated added cost/complexity.
Your dry situation would be the same whether liquid was involved or not. Each product lives in its "own world" in some respects.
With any control system the width reduction is taken in "steps" which relate to the boom section widths. With a four section 60' sprayer, the sections might each be 15'. So as spraying progresses in point rows, the systems sees a 60' sprayer, then a 45' sprayer, then a 30' sprayer, then a 15' sprayer and then 0' or OFF. The progression does not go 60', 59', 58' etc.
With a one section sprayer or rig, the only section is the entire width. For a 60' spinner bed, the system would see either a 60' or 0' rig.
Edited by tedbear 1/1/2008 12:01
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Insight and auto swath
