Auto-Guide™ 3000 Basic: Nudge and GPS

GPS drift

Global positioning system (GPS) drift is the condition where the positional information that is obtained from the GPS satellites moves over time. The drift can be caused by the changing of the satellite constellation patterns that are used by the TopDock to get the positional information. As a result, there can be a difference between the actual wayline and the position of the wayline shown on the guidance screen.

The lower the accuracy of the correction source is, the more the positional information will move over time. The higher accuracy correction sources are still subject to GPS drift, but to a smaller amount.

The GPS drift compensation and manual nudge features are available in both the basic and the advanced guidance modes.

 

Manual nudge offset

The manual nudge offset is used to move the wayline over an obstacle such as an irrigation channel, road, or fence.

To use the manual nudge offset, the vehicle must be on the wayline that will have the manual nudge offset.

Curved and straight waylines (1) will move to the left (2) or right after entering a manual nudge offset value (3).

nudge fg 55

Fig. 55

 

The pivot wayline (1) diameter will increase (2) or decrease after entering a manual nudge offset value (3). The center of the pivot (4) will not change.

nudge 56

Fig. 56

 

 

Making a manual nudge offset

 

nudge 57

Fig. 57

 

1. Select  nudge wrench  (1).

2. Select  nudge arrow(2).

3. Select  nudge street arrow (3).
4.  Select  nudge green arrow left(4) or  nudge arrow right(5) as necessary to set the direction of the manual nudge offset. Select nudge 6(6) to move between the arrows. The arrows will turn green when selected.

 

5. Enter the manual nudge offset value (7).

6. If necessary, select nudge 8 (8) to reset the manual nudge offset value to zero. Message screens can show.

7. Select  nudge chk mark(9) to save and return to the setup menu.

 

Automatic nudge offset

Automatic nudge offset compensates for global positioning system (GPS) drift for less accurate correction sources.

To use the automatic nudge offset, the vehicle must be on the wayline that will have the automatic nudge offset.
Curved and straight waylines (1) will move to the left (2) or right after adding an automatic nudge offset value (3).

nudge 58

Fig. 58

 

The pivot wayline (1) diameter will increase (2) or decrease after adding an automatic nudge offset value (3). The center of the pivot (4) will not change.

Nudge 56 and 59

Fig. 59

 

 

Making an automatic nudge offset

nudge 60

Fig. 60

 

1.  Select nudge wrench (1).

2.  Select  nudge arrow(2).

3.  Select nudge street arrow  (3).

4.  Select nudge street arrow AUTO (4).

 

5. A message screen will show. Follow the prompt.

 

6. The amount (5) will change with the automatic nudge offset value.

7.  Select  nudge chk mark(6) to save and return to the setup menu.

 

 

3.1.4 GPS drift compensation

Global positioning system (GPS) drift compensation lets adjustments be made by making a nudge amount value and using the nudge amount while using automatic steering.

See the information for making manual and automatic nudge offsets.

Straight waylines (1) will move to the left (2) or right after entering the nudge increment value (3).

nudge 58

Fig. 61

 

Curved waylines (1) will move (2) after entering the nudge increment value.

nudge 62

Fig. 62

 

 

Pivot waylines (1) will move (2) after entering a nudge increment value. The center of the pivot (3) is moved (4), but the diameter of the wayline does not change.
nudge 63

Fig. 63

 

 

 

Making a GPS drift compensation.

nudge 64

Fig. 64

 

1.  Select nudge wrench(1).

2.  Select nudge arrow(2).

3.  Select nudge street arrow(3).

 

4. In the GPS drift compensation box, enter the nudge amount in the increment box (4).

 

5.  Select nudge arrow bar left(5) or nudge arrow bar right(6) to set the increment.

 

6. Message screens can show.

7.  Select  nudge chk mark(7) to save and return to the setup menu.

 

The nudge icons will show on the main guidance screen for use while using automatic steering.

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