Raymarine ST3000 Owner's Handbook Manual

Also see for Autohelm ST3000: Operation and installation Quick reference guide Quick reference guide Quick reference guide

Contents

Raymarine ST3000 Owner's Handbook Manual Manual pdf 64 page image

Chapter 5: Commissioning the Wheel Pilot 595 Commissioning the Wheel Pilot5.3 Adjusting autopilot performanceThe factory setting for rudder gain provides stable control for initialsea trials. However, different boats can vary widely in their responseto the helm and further adjustment to the rudder gain may improve theautopilot’s steering characteristics.The following test will determine whether the rudder gain is set toohigh or too low.1. In clear water and with the autopilot in Auto mode, alter course tostarboard by 40° by pressing +10 four times.• At cruising speeds, a course change of 40° should result in acrisp turn followed by an overshoot of no more than 5°.If this occurs the rudder gain is set correctly.• If rudder gain is too high, the 40° course change will result in adistinct overshoot of more than 5° (A).Correct this oversteer by reducing the rudder gain setting.• If rudder gain is too low, the boat’s steering performance willbe sluggish – it will take a long time to make the 40° turn andthere will be no overshoot (B).Correct this understeer by increasing the rudder gain setting.Note: It is easier to recognize these actions in calm sea conditionswhere wave action does not mask basic steering performance.NewheadingNewheadingANewheadingBCorrectrudder gainRudder gaintoo highRudder gaintoo lowD3262-2