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trimble autopilot
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PER
Posted 4/6/2007 12:47 (#132075 - in reply to #131753)
Subject: Re: trimble autopilot


logear,
P Gain: slew time taken for the wheels to go from one lock to another. This tells the Nav controller how quickly the wheels move.
Deadzone: pretty much what it says. This is the time taken from when the Nav controller tells the wheels to move to when they actually move. Bit like freeplay in EZ Steer.
Aggr on run screen: In simple terms this is fine tuning the P Gain.
Acquire line aggr: How quickly the tractor comes on line.
252 updates: This was set to 10 to help alleviate problems due to bad satellite constellations or not enough satellites in view. If you experience low no's satellties, put it to 10. You can leave it at 13 if you are not having a problem.

With the new auto DZ calibration, this calibration process is now more accurate. Especially with ver 4.4. Symptoms of poor DZ cal used to be wheels chattering at high speeds.
P Gain can be a little harder. Set too low and you'll have difficulty acquiring the line but set too high and it will overshoot, or weave across the line. This behaviour changes at higher speeds.

From what I can tell of your machines behaviour, try playing with the P Gain. If this does not cure it, try manually altering the DZ value by +1 or 2 points.

PER
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