Chapter 4
54 OmniSeed™ Viper Pro™ Installation & Operation Manual
Tractor Setup
The tractor setup screens configure the relative locations of the GPS antenna, the control point or hitch, and
the pivot point. These points may be different for the specific tractor type selected. See the Conventional
Tractor Setup section on page 54, Tracked Tractor section on page 55, or Articulated Tractor section on
page 55 for detailed instructions on locating and measuring these points.
Note: All measurements should be taken with respect to the pivot point of the vehicle. If required, set the
fore/aft or left/right selections with respect to the pivot point and facing toward the front of the
vehicle.
Be sure to enter each measurement in the units displayed above the on-screen keypad. See the
Display Units section on page 37 for assistance to change the units of measure.
Conventional Tractor Setup
Note: The pivot point of a conventional tractor is the center of the rear axle.
1. Enter the left/right offset of the GPS antenna from the pivot point. The left/right offset must be measured
parallel to the vehicle rear axle.
2. To determine the offset direction, at the pivot point and facing toward the front of the vehicle, is the antenna
to the left or to the right? Select the direction of the left/right offset.
3. Enter the fore/aft offset of the GPS antenna from the pivot point. The fore/aft offset must be measured
perpendicular to the vehicle rear axle.
4. To determine the offset direction, at the pivot point and facing toward the front of the vehicle, is the antenna
in front (fore) or behind (aft) of the pivot position? Select the direction of the fore/aft offset.
5. Measure the distance from the pivot point (center of the rear axle) to the control point or hitch.
6. Touch the Next button and continue to the Cart Setup section on page 56 or the Drill Setup section on
page 57.
GPS Antenna Fore/Aft
Measurement
GPS Antenna Left/
Right Measurement
Pivot/Control Point
Distance
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