User manual AUTOHELM ST7000

[. . . ] Operator Controls - Auto - Course Changes - Standby - Track - Response - Illumination 3. Additional Displays - Display - Auto Mode - Track Mode - Navigation Displays - Watch Alarm - Warning Messages 4. Additional Information for Sailing Vessels - Auto Tack - Wind Trim 5. Operating Hints - Response Level Adjustment - Track - Waypoint Advance - Automatic Trim - Rudder Gain - Rudder Gain Adjustment (sail) - Rudder Gain Adjustment (power) - Rudder Gain/Speed Adjustment (power craft) - Unsatisfactory steering performance - Failure to disengage - Manual Override (sterndrive) - Control Unit Display Adjustment 6. [. . . ] When the alarm is sounding the ST7000 will maintain the current heading and automatic track control is suspended. Check the displayed new bearing to waypoint and when it is safe to turn onto it, resume automatic track control by simply Rudder Gain The rudder gain level selected during initial sea trials will normally provide excellent steering performance over a wide range of conditions. However, it may be noticed that the autopilot tends to be a little less stable on northerly headings in the higher latitudes of the Northern hemisphere (and conversely southerly headings in the Southern hemisphere). This is caused by the increasing angle of dip of the earth's 11 magnetic field at higher latitudes which has the effect of Rudder Gain/Speed Adjustment (Powercraft) High amplifying rudder response on northerly (southerly) speed planing craft exhibit very different steering characteristics when on and off the plane. is generally necessary to adjust the Rudder Gain setting Rudder Gain Adjustment (Sail) when going from displacement speed to planing speed It is not normally necessary to adjust the autopilot gain or vice versa. setting once the correct level has been established Two options are available to achieve this: during initial sea trials. fault:Note: The effect is reversed for the Southern · hemisphere. · Autoadapt (High speed planing craft) The ST7000 can be set automatically to reduce the effects of northerly heading instability. This feature is · selected in calibration mode by entering the latitude (see · Installation Handbook, Calibration, section on 'Auto Adapt'). When selected the ST7000 automatically adjusts the Rudder Gain depending on the compass heading, removing the need for manual adjustment. Has a magnetic influence been introduced near the fluxgate compass?anchor, chain, radio equipment, loudspeaker, tools, generator etc. Check that the autopilot compass heading still corresponds with the steering compass. Are all fuses intact, circuit breakers engaged?Are all screw connections tight and free of corrosion? 12 · If the autopilot fails to hold course check the Rudder Gain level. Has it been changed from the initial sea trials level (check in Installation Manual)?· If the vessel wanders check that the Rudder Reference Transducer linkage is secure with no free play. Hydraulic Drive Units only:· Check that all unions are tight and bleed system to remove air. Failure of Drive Unit to Disengage The mechanical drive actuators of the ST7000 are designed to 'Fail Safe' - When power is disconnected the drive unit will disengage leaving the steering system free for manual control. When Standby is selected the actuator will disengage leaving the steering free. It is remotely possible that a fault could develop which could cause the actuator to remain engaged even when Standby is selected. If this happens:- calibration (see Installation Handbook). [. . . ] The product will then be serviced free of charge and returned promptly direct to the sender. Equipment used outside the country of purchase can be either:a. Returned to the Distributor or Dealer in whose country the equipment was originally purchased - it will then be serviced free of charge and promptly returned direct to the sender, or b. The product can be returned freight pre-paid to the authorised Distributor or its appointed Service Centres in the country in which the product is being used. [. . . ]