Table of Contents

Fore/Aft and Height

Fore/Aft

For machine receivers, measure Fore/Aft from the machine center of rotation to the receiver.

On some AutoTrac-equipped machines, Fore/Aft value is automatically detected and entered during power up.

For implement receivers:

NOTE: When using a StarFire 3000 as the implement receiver, if the fore/aft value is negative (due to the Center of Rotation and In-line Offset measurements entered in the implement profile), the fore/aft input box remains blank and the operator must manually enter that value.

Enter Fore/Aft value

  1. Select Fore/Aft input box.

  2. Enter value using keypad.

  3. Select OK.

NOTE: Enter a positive value if the receiver is in front of the center of rotation. Enter a negative value if the receiver is behind the center of rotation. 

NOTE: Fore/aft is calculated using the center of rotation and GPS in-inline offset value from the Implement Profile application. The calculation overrides any value that is entered manually in the fore/aft input box.

NOTE: To verify the fore/aft calculation accuracy, manually measure Fore/Aft distance.

Height

NOTE: For implement receivers, the GPS height entered in the implement profile is the value used for all display operations. That value overrides the height value entered here.

Height is measured from ground to middle of receiver dome.

Select input box and use keypad to enter height.

Enter Height value

  1. Select Height input box.

  2. Enter value using keypad.

  3. Select OK.

IMPORTANT: Under or over compensation for machine roll angles will occur if height is incorrectly entered during setup.

Example: A 10° slope with a StarFire height error of 30.5 cm (12 in) results in a position offset of 5 cm (2 in) on ground.

Factory-default setting is 320 cm (126 in). On some AutoTrac-equipped machines, the height value is automatically detected and entered during power up. Since this dimension is critical for proper operation of the TCM and can vary due to machine configuration and tire sizes, the operator should measure actual distance each time the TCM is installed on a different machine.

NOTE: For greatest accuracy, manually measure receiver height distance.