Autotrim; Adjusting; Rudder Damping - Raymarine SmartPilot X-Series Setup Manual

Chapter 1: Procedures
3. Use -1 or +1 or the rotary control to adjust the counter rudder.
4. Hold down standby for 2 seconds to save the changes and leave Dealer
calibration.
5. Press auto to check the SPX system performance in Auto mode.

AutoTrim

You may also need to adjust the AutoTrim setting. AutoTrim determines how quickly
the SPX system applies 'standing helm' to correct for trim changes caused, for
example, by changes in the wind load on the sails or superstructure, or an imbalance
of engines.
Increasing the AutoTrim level reduces the time the SPX system takes to get back onto
the correct course, but makes the boat less stable. If the SPX system:
• Gives unstable course keeping and the boat 'snakes' around the desired course,
decrease the AutoTrim level
• Hangs off course for excessive periods of time, increase the AutoTrim level

Adjusting

Before attempting to adjust the AutoTrim setting, ensure you have sufficient
experience using the SPX system.
On sail boats you can only evaluate the effect of AutoTrim while under sail.
If you need to adjust AutoTrim, go up one level at a time and use the lowest acceptable
value. The possible settings range from OFF (no trim correction) to 6 (fastest trim
correction).
To adjust the AutoTrim:
1. Enter Dealer calibration as described on page 7 .
2. Use disp as necessary to access the AUTOTRIM screen (see page 30 ).
3. Use -1 or +1 or the rotary control, to adjust the AutoTrim level.
4. Hold down standby for 2 seconds to save the changes and leave Dealer
calibration.
5. Press auto to check the SPX system performance in Auto mode.

Rudder damping

On SPX systems with a rudder reference transducer, you can set the rudder damping
to prevent autopilot 'hunting', i.e. continuously moving the steering backwards and
forwards by small amounts. To set up the rudder damping:
1. Enter Dealer calibration as described on page 7 .
2. Use disp as necessary to access the RUDD DAMP page.
3. Use -1, +1, -10 and +10 or the rotary control to set the rudder damping so the
hunting stops. Use the lowest rudder damping value at which hunting stops..
4. Hold down standby for 2 seconds to save the changes and leave Dealer
calibration.
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