All through the rising season, the sprayer passes over a area a number of occasions to realize completely different targets like crop diet, weed management, and illness/insect administration. With each software, the merchandise within the tank should be delivered on the proper fee and on the proper protection to be efficient.
“Farmers make investments important money and time in spraying purposes,” says Logan Handsaker, Product Gross sales Specialist, Ag Chief Know-how. “But, sprayers with out pulse width modulation (PWM) know-how often can’t obtain the proper fee and proper protection to ship the very best ends in the sphere.”
How PWM works
On a conventional sprayer, a nozzle is at all times open throughout an software. The circulate fee is regulated to account for floor pace modifications which ends up in stress and protection variations. When extra circulate is required, the growth stress should improve to get extra quantity out of the nozzle. When much less circulate is required, growth stress reduces. As stress varies, spray protection is affected inflicting inconsistent droplet measurement and sample.
PWM know-how was developed to beat the stress variation problem.
The nozzle in a PWM system cycles between open and shut constantly at a excessive frequency (10 to twenty Hz) to ship the goal fee. When the sprayer travels quicker and extra circulate is required to realize the goal fee, every pulse (or obligation cycle) stays open longer permitting further product to be allotted. When the sprayer travels slower and fewer circulate is required, the heart beat turns into shorter to permit much less circulate to be allotted.
“There are at all times 10 open/shut cycles per second no matter pace and circulate demand,” Handsaker says. “We’re merely altering the period of time we maintain the valve open in every of those cycles.”
One other key advantage of PWM is flip compensation.
Pulse width modulation (PWM) programs like Ag Chief’s RightSpot enable the consumer to maneuver past the constraints of a traditional sprayer to make sure merchandise are utilized on the proper fee and on the proper protection.
“Most fields require operators to use whereas turning,” Handsaker says. “Nevertheless, standard sprayers can’t compensate for turns and apply an excessive amount of or too little on the within and out of doors of the growth, respectively. PWM nozzle know-how responds to curved paths by dishing out the suitable quantity based mostly on the pace every finish of the growth is touring.”
Get it proper with RightSpot™
PWM nozzle programs like Ag Chief’s RightSpot, an aftermarket improve for sprayers, enable the consumer to maneuver past the constraints of a traditional sprayer to make sure merchandise are utilized on the proper fee and on the proper protection.
With RightSpot, circulate fee and stress are managed independently. Particular person pulsing nozzles preserve a constant, user-defined growth stress throughout a variety of pace. The operator can pace up or decelerate with out sacrificing the droplet measurement or protection utilized. Automated shut-off at a nozzle stage permits the operator to cowl irregular shapes with out extreme overlap to cut back product waste. Headlands, terraces, and curves are additionally accounted for with flip compensation sustaining constant fee utilized on the inside and outer parts of the growth.
RightSpot is managed by means of the year-round InCommand® 1200 display for full visibility inside and out of doors the cab.
“With PWM spraying know-how, we’re enhancing the standard and precision of the sprayer to make sure extra acres obtain the proper remedy, and we see the very best end result within the area,” Handsaker says.
Renewed curiosity in PWM know-how
PWM is just not a brand new idea. First launched within the mid Nineteen Nineties, the know-how has gained renewed curiosity within the final decade due to important market modifications together with:
1. Many problematic weeds have grow to be proof against glyphosate.
2. Glyphosate options are getting used and are sometimes essential. These merchandise are:
• extra depending on high quality protection and correct charges for efficacy.
• costlier inflicting farmers to be further acutely aware of spraying effectivity.
• extra hazardous to the present or following crop if over utilized.
3. There’s heightened consciousness and emphasis on making use of herbicides appropriately to mitigate further weed resistance.
“These market modifications have led most OEM sprayer producers to embrace PWM nozzles recognizing their superiority in software high quality and consistency past standard sprayer management,” Handsaker says. •
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