Garmin GHP 20 Marine Autopilot System with SmartPump Installation Instructions Manual

Also see for GHP 20 Marine Autopilot System for Steer-by-Wire: Product information Owner's manual Installation instructions

Contents

Garmin GHP 20 Marine Autopilot System with SmartPump Installation Instructions Manual Manual pdf 16 page image

Performing the Autotune ProcedureBefore you begin this procedure, you must have a large stretchof open water available.1 Adjust the throttle so the boat travels at a typical cruisingspeed that provides responsive steering.2 Select an option:• If you are performing this procedure as part of the SeaTrial Wizard, select Begin, and continue to drive in astraight line.• If you are performing this calibration outside of the SeaTrial Wizard, from the heading screen, select Menu >Setup > Dealer Autopilot Configuration > AutomatedSetup > Autotune > Begin.The boat performs a number of zigzag motions while theautotune is in progress.When complete, a message is shown.3 Select an option:• If the autotune completes successfully, select Done andtake manual control of the boat.• If the autotune fails, increase the throttle, select Retry,and allow the system to perform the autotune again.4 Select an option:• If the autotune fails, but you have not reached maximumcruising speed, repeat steps 1–3 until the autotunecompletes successfully.• If the autotune fails and you have reached maximumcruising speed, reduce your speed to the initial autotunespeed and select Alternate Autotune to begin analternate autotune procedure.Setting NorthBefore you begin this procedure, you must have a large stretchof open water available.This procedure appears if the autopilot is connected to anoptional GPS device (page 13), and the device has acquired aGPS position. During this procedure, the autopilot uses the GPSheading information to calibrate north on the autopilot system.If you do not have a GPS device connected, you are promptedinstead to set the fine heading adjustment (page 16).1 Drive your boat at cruising speed in a straight line.2 Select an option:• If you are performing this procedure as part of the SeaTrial Wizard, select Begin, and continue to drive in astraight line.• If you are performing this calibration outside of the SeaTrial Wizard, from the heading screen, select Menu >Setup > Dealer Autopilot Configuration > AutomatedSetup > Set North > Begin.3 Allow the autopilot to calibrate north.When the calibration is complete, a message is shown.4 Select an option:• If the calibration completes successfully, select Done.• If the calibration fails, repeat steps 1–3.Setting the Fine Heading AdjustmentThis procedure appears only if you do not have an optional GPSdevice connected to the autopilot (page 13). If the autopilot isconnected to a GPS device that has acquired a GPS position,you are prompted to set north instead (page 16).1 Using a handheld compass, identify north.2 Select an option:• If you are performing this procedure as part of the SeaTrial Wizard, adjust the fine heading setting until itmatches north on the magnetic compass.• If you are performing this calibration outside of the SeaTrial Wizard, from the heading screen, select Menu >Setup > Dealer Autopilot Configuration > AutomatedSetup > Fine Heading Adjustment, and adjust the fineheading setting until it matches north on the magneticcompass.3 After the fine heading setting matches north on the magneticcompass, select Done.Testing and Adjusting the ConfigurationNOTICETest the autopilot at a slow speed. After the autopilot has beentested and adjusted at a slow speed, test it at a higher speed tosimulate normal operating conditions.1 Drive the boat in one direction with the autopilot engaged(heading hold).The boat may oscillate slightly, but it should not oscillatesignificantly.2 Turn the boat in one direction using the autopilot andobserve the behavior.The boat should turn smoothly, not too quickly or too slowly.When you turn the boat using the autopilot, the boat shouldapproach and settle on the desired heading with minimalovershoot and oscillation.3 Select an option:• If the boat turns too quickly or too sluggishly, adjust theautopilot acceleration limiter (page 16).• If the heading hold oscillates significantly or the boat doesnot correct when turning, adjust the autopilot gain(page 16).• If the boat turns smoothly, the heading hold oscillates onlyslightly or not at all, and the boat adjusts the headingcorrectly, the configuration is correct, and no furtheradjustments are necessary.Adjusting the Acceleration Limiter Settings1 Enable Dealer Mode (page 17).2 Select Menu > Setup > Dealer Autopilot Configuration >Autopilot Tuning > Acceleration Limiter.3 Select an option:• Increase the setting if the autopilot turns too quickly.• Decrease the setting if the autopilot turns too slowly.When you manually adjust the acceleration limiter, makerelatively small adjustments. Test the change before makingadditional adjustments.4 Test the autopilot configuration.5 Repeat steps 3–4 until the autopilot performance issatisfactory.Adjusting the Autopilot Gain Settings1 Enable Dealer Mode (page 17).2 Select Menu > Setup > Dealer Autopilot Configuration >Autopilot Tuning > Rudder Gains.3 Select an option based on the type of boat:• If you have a sailboat, select Gain and adjust how tightlythe rudder holds the heading and makes turns.If you set this value too high, the autopilot may beoveractive, attempting to constantly adjust the heading atthe slightest deviation. An overactive autopilot can drainthe battery at a faster-than-normal rate.• If you have a sailboat, select Counter Gain and adjusthow tightly the rudder corrects the turn overshoot.If you set this value too high, the autopilot can overshootthe turn again when attempting to counter the originalturn.16