In the heart of Balıkesir, Türkiye—a region famous for its beautiful sunflower fields and olive groves—we recently reached a big milestone for farming technology. Our team finished 50 hours of field testing for our new PWM spray control system. This system is designed to give farmers much better control over their sprayers, making the job of spraying crops easier and much more accurate than before.

Standard sprayers usually turn large groups of nozzles on or off at the same time, which can waste a lot of chemicals. The new PWM spray control kit is different because it uses individual nozzle control, allowing every single nozzle to work on its own. This change from controlling big groups to managing each nozzle is a huge step forward, helping farmers save money and protect their land more effectively.

The Power of PWM: Achieving Nozzle-Level Precision

At the core of the new kit's success is Pulse Width Modulation (PWM) technology. To understand why this matters, one must look at the limitations of traditional spraying. In standard systems, if farmers want to change the flow rate, they have to change the pressure. Unfortunately, changing pressure alters the droplet size: too much pressure creates a mist that drifts away in the wind; too little pressure creates large drops that roll off the leaves.

The new system bypasses this problem entirely. By automating electronically controlled nozzles via PWM, the system maintains a constant pressure to ensure consistent droplet size and spray quality. The flow rate is instead managed by rapidly pulsing solenoids at each nozzle—turning the flow on and off up to 20 times per second (20Hz).

By adjusting the "duty cycle" (the percentage of time the nozzle is open), the system can precisely deliver the exact dosage required, even as the tractor speeds up or slows down. This ensures that every inch of the field receives the same high-quality coverage, regardless of terrain or travel speed.

Hardware Setup for Spraying Test in Balıkesir

To put this technology to the ultimate test, we recently installed this PWM spraying control system on a New Holland TR6.160S tractor with a Parlayan 2025 sprayer in Türkiye. The setup featured a massive 22-meter boom fitted with 44 PWM nozzles.

The intelligence of the system was distributed across a sophisticated Vehicle Control Unit (VCU) network. In our Balıkesir test, the hardware architecture was set up as follows:

• One Main VCU: Acting as the "brain" of the operation.
• Three Secondary VCUs: Each secondary unit is capable of managing up to 16 individual nozzles.
• Modular Scalability: The power of the system lies in its flexibility. If a farmer has a larger sprayer, they simply add another VCU; for smaller setups, they use fewer. It is a plug-and-play solution for the modern farming.
  
  

Proven Precision: 50-Hour Field Testing of 5 Key Functions

During our 50-hour field trial, we put the system through a series of rigorous tests to guarantee maximum reliability under real-world conditions. These trials proved that the system maintains absolute precision even during complex farming maneuvers, giving farmers total confidence in their spray coverage. Our testing centered on the following five key smart functions:

Boundary Entry/Exit
Boundary entry and exit are common challenges in modern farming. By using pre-configured digital boundaries, the system demonstrated flawless precision when starting or stopping at the edge of a field. This prevents "overspray" into neighboring plots or water sources—a vital feature for irregular fields, ensuring every inch of land receives exactly the right amount of treatment.

Individual Nozzle Switching
We successfully proved that all 44 nozzles can operate independently. This means that if the boom passes over a previously treated spot or an area that doesn't require chemicals, the system shuts off only the specific nozzles needed. This ensures perfect coverage while significantly reducing costs by preventing the waste of expensive inputs.

Alternating Adjacent Nozzles
By pulsing nozzles in alternating pairs, the system creates a perfectly blended and uniform spray pattern. This technique ensures that the spray mists from neighboring nozzles overlap correctly, eliminating any potential gaps in coverage. Even when working at high speeds or in windy conditions, this alternating rhythm maintains a consistent application, leaving no part of the crop untreated and ensuring the most effective chemical distribution possible.

Turn Compensation
When a tractor makes a turn, the outer end of the boom travels much faster than the inner end. Without proper adjustment, this leads to uneven application—the outer crops are under-sprayed while the inner ones receive too much. To solve this, the system automatically adjusts the PWM pulse rates across the entire 22-meter boom. By increasing the flow on the outside and decreasing it on the inside, the system ensures a perfectly uniform application throughout the entire turn.

Dynamic Speed-Proportional Control
Our field tests showed that even when the New Holland tractor changed speeds, the amount of spray stayed perfectly steady. The system automatically matches the nozzle output to the tractor's speed in real-time. Whether the tractor is speeding up on a straight path or slowing down for rough ground, the spray rate adjusts instantly. This ensures that every part of the field receives the exact same, precise amount of treatment.

Inside the Cabin: Integration and Ease of Use

Technology is only as effective as the interface used to control it. During our trials in Türkiye, we integrated the PWM spraying control kit with the AT2 Auto Steer System for a clear demonstration of its capabilities.

Currently, it is also fully compatible with the FJD AT1, AT2 Max, AT2 Lite, and AG1 models. For farmers already using these FJD systems, they can easily and affordably upgrade their existing sprayers with this nozzle-based control kit, instantly transforming their equipment into a high-precision machine.

Inside the cabin, the operator can see exactly what is happening across the entire 22-meter boom. The screen shows the real-time spray rate for all 44 nozzles as they work on their own. One of the best features we tested was the prescription map integration. By uploading a digital map of the field, the system uses GNSS to figure out exactly which nozzles to open and how much to spray.

Whether farmers are working in a weirdly shaped field or trying to avoid a specific spot in the middle of a crop, the system handles it perfectly. It calculates the path and opens each nozzle one by one. There is no guesswork involved—just smart, data-driven farming.

Shaping the Future of Smart Spraying

The successful tests in Balıkesir prove that the nozzle-based spraying control system is ready for farmers everywhere. By switching from old-fashioned group control to controlling each nozzle individually, farmers can see a real difference in their results. This technology helps save 30% to 40% on chemicals by preventing double-spraying in the same spot. It also helps the environment by reducing runoff and leads to better harvests because every plant gets exactly the right amount of treatment.

As we finished our testing work in Türkiye, one thing was certain: the system spray crops with expert precision. This test is a big step toward making high-tech farming easy and affordable for everyone. We are excited to bring this technology to fields around the world, helping farmers grow more while using less.

Contact us today for a customized integration solution or to schedule a product trial for your sprayer. The nozzle control kit is now available for global pre-order! Contact FJDynamics to secure your order and bring high-precision spraying to your farm.