Autohelm Inboard Autopilots (ST6000 and ST7000 systems) Service ...

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Autohelm• If the autopilot fails to hold course checkthe Rudder Gain level. Has it been changedfrom the initial sea trials level (check inInstallation Manual)?• If the vessel wanders check that theRudder Reference Transducer linkage issecure with no free play.Hydraulic Drive Units only:-• Check that all unions are tight and bleedsystem to remove air.Failure of Drive Unit to DisengageThe mechanical drive actuators of theST6000 are designed to fail Safe1 - Whenpower is disconnected the drive unit willdisengage leaving the steering system freefor manual control.When Standby is selected the actuator willDisengage leaving the steering free.It is remotely possible that a fault coulddevelop which could cause the actuator toremain engaged even when Standby isselected. If this happens:-• DISCONNECT THE MAIN CIRCUITBREAKER TO THE AUTOPILOT - THESTEERING WILL IMMEDIATELY BE FREE,or• IN AN EMERGENCY THE ACTUATORCLUTCH CAN NORMALLY BEOVERRIDDEN BY TURNING THESTEERING WHEEL HARD.It is emphasised that this fault is extremelyunlikely and can be immediately correctedas described.If preferred a separate Override switch canbe fitted close to the steering position whichwill break the actuator clutch drive forEmergency Use.Stern Drive Actuator(Manual Override Option)Manual override is selected duringcalibration using the Auto Release option. Itmust only be used on installations fitted withthe stern drive actuator. When it has beenselected, the ST6000 can be overridden toallow hand steering by turning the steeringwheel. This will return the ST6000 toStandby and sound the control unit buzzerfor 10 seconds. There is a slight delaybefore the ST6000 will return to Standby.Excessive force is not required and willnot reduce this delay.With the ST6000 in Auto and clear ofobstruction turn the steering wheel toobserve the manual override. Repeat two orthree times until you are confident with itsoperation.The manual override is intended foremergency use only. The ST6000 shouldnormally be disengaged by pushing theStandby button on the control unit.14SeaTalk Service Manual
Autohelm3.4 CalibrationRecommended SettingsAs supplied the ST6000 can be switched onand tested safely without any adjustmentsto the factory calibration settings.The table below lists the suggested settingsfor sailing and power displacement andplaning power vessels. These will providegood performance for initial sea trials andcan be fine tuned later to optimiseperformance.Vessel TypeDisplacement PlaningFactory preset Set toRudder Gain(level) 5 2Rate Gain(level) 2 1Rudder AngleLimit (degrees) 30 30Turn Rate Limit(degrees/sec) 20 5Cruise Speed(knots) 8 25Off CourseAlarm (degrees) 20 20Trim Level 1 1Auto Adapt OFF ONSelecting and Exiting from Calibration ModeTo select calibration mode:-• Push Standby.• Push and hold down for 2 seconds,Track and Display together.• Repeat push and hold down for 2seconds, Track and Display together toenter calibration mode.To exit calibration mode at any point;a) Saving any changes made:-• Push and hold down for 2 seconds,Track and Display together.b) Ignoring any changes made:-• Push Standby.Autopilot Drive Unit TypeMechanical Stern HydraulicDriveFactory Set to Set topresetDrive Type 3 3 4Rudder1PositionDeadband(level) See3.8 1 1AutoReleaseOFF ON OFFSeaTalk Service Manual 15
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AutohelmAutohelm Inboard Autopilots
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AutohelmST7000 SystemMaster Table o
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AutohelmWind Change AlarmWind Trim
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Autohelm- Position the support plat
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Autohelm Inboard Autopilots (ST6000 and ST7000 systems) Service ...

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