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Your Application Questions Answered

by Jun 18, 2015DirectCommand™

Now that planting season is winding down, spraying season is starting to pick up. Here are several tips for troubleshooting your system as you begin spraying this summer.

What if my boom sections are turning on/off too early or too late?

The first step is to verify the application offset is measured and entered into the display accurately. The second step is to adjust the look-ahead settings. The look-ahead values are how far the system looks ahead to turn sections on or off.  The values should only be changed by 0.1s at one time.

Boom sections turning ON too late

-Increase Turn-On Look-Ahead

Boom sections turning ON too early

-Decrease Turn-On Look-Ahead

Boom sections turning OFF too early

-Decrease Turn-Off Look-Ahead

Boom sections turning OFF too late

I-ncrease Turn-Off Look-Ahead

 

What if my display is not mapping?

Verify the system is applying and that you are receiving an as applied rate. If those two conditions are met, it must mean that there is flier point recorded causing the map to be zoomed out to where the coverage map will not show up. From the home screen press the wrench next to the Grower/Farm/Field, and press the clear map bounds button. (See Figure 1) It will clear out any flier points and the display should begin mapping.

What does a “Rate Not Responding” alarm mean?

Rate Not Responding alarms (see Figure2) show up when the system thinks it should be applying but is not receiving feedback from the flow meter. This can be used in troubleshooting as it is the only way we know that full voltage should be sent to open both the control valve and the boom valves. With the rate not responding alarm present, there should be 12 volts at the control valve and 12 volts on the signal wire to the control valves. To activate the Rate Not Responding alarm for troubleshooting:

  • Turn the hydraulic circuit off to the pump.
  • Enter a manual ground speed
  • Enter and select a target rate
  • Turn Autoswath off
  • Turn on master switch and section switches
  • Verify the implement switch is in the active state or the jumper plug is installed.

How to enter a manual ground speed?

A manual ground speed is used to allow the sprayer to apply sitting still and can be used for troubleshooting purposes and cleaning out the sprayer. To enter a manual ground speed, press the wrench in the top right of the home screen, select the configuration, press the wrench in the middle, and select speed input on the left. Under the primary source, select manual speed, and enter a speed to simulate. Your manual ground speed should register on the run screen. (See Figure 3)

 

How to test a control valve?

While the Rate Not Responding alarm is active, the two pin connection going to the control valve should have 12 volts across it. PWM Valves should have 12 volts when the master switch is on and 0 volts with the master switch off. Servo valves will either have positive or negative 12 volts when on depending on how your voltmeter leads are connected and the polarity will switch when the master switch is off.

 

For questions or reference material on DirectCommand Operation, the display manual and Knowledgebase are always available.  Your local Ag Leader Dealer and Ag Leader Technical Support are also available options for any questions or troubleshooting concerns that may arise this season.

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