Raymarine ST7000 User manual

ST7000 Installation

Autohelm
AutohelmAutohelm
Autohelm®
®®
®

Contents
1. System Description 2 4. Calibration 34
1.1.1 Course Computer 3 4.1 Recommended Settings 34
1.1.2 Control Unit 3 4.2 Calibration Mode 34
1.1.3 Fluxgate Compass 3 4.3 Adjusting Calibration 35
1.1.4 Rudder Reference Transducer 4 4.4 Display Contrast Adjustment 37
1.1.5 Auxiliary Alarm 4 4.5 Permanent Watch Alarm 38
1.1.6 Masthead Transducer 4 4.6 Recorded Calibration Settings 38
1.1.7 Type CR Interface Unit 5 4.7 Rudder and Rate Gain Tables 38
1.2 Drive Systems 6
1.2.1 Rotary Drive 6 5. Initial Sea Trials 39
1.2.2 Linear Drive 7 5.1 Automatic Deviation Correction 39
1.2.3 Hydraulic Drive 8 5.2 First Sea Trials 39
1.2.4 ConstantRunning Power Pack 9 5.3 Response Control 39
1.2.5 Sterndrive 11 5.4 Automatic Trim Control 40
5.5 Rudder Gain Adjustment
2. Installation 12 (Displacementcraft) 40
2.1.1 Course Computer 12 5.6 Rudder Gain adjustment
2.1.2 Control Unit 13 (High Speed Planing Craft) 41
2.1.3 Fluxgate Compass 13 5.7 Manual overide
2.1.4 Rudder Reference Transducer 14 (Sterndrive Actuators only) 41
2.1.5 Auxiliary Alarm 15 5.8 Rate Gain Adjustment 41
2.1.6 Masthead Transducer 16 5.9 Compass Alignment 42
2.2 Drive Systems 16
2.2.1 Rotary Drive 16
6. Track Control 43
2.2.2 Linear Drive 18 6.1 FunctionalTest 43
2.2.3 Hydraulic Drive 19 6.2 Operating Hints 43
2.2.4 Stern Drive 22
2.3 Cabling and Power Supplies 26 7. Windvane Control (Sail Only) 45
2.3.1 SignalCabling 26
2.3.2 Connection to other SeaTalk Units 27
2.3.3 NMEA Input 28
2.3.4 D.C.Power Supplies and Drive Unit 28
2.3.5 Type CR Installations 30
2.3.6 Stern Drive Actuator 31
3. Functional Test 32
3.1 Switch On 32
3.2 Rudder Angle Sense 32
3.3 MechanicalTest(ManualSteering) 32
3.4 Rudder Angle Alignment 32
3.5 Operating Sense 32
3.6 Rudder Deadband 32
3.7 MechanicalTest(AutopilotSteering) 32
3.8 MechanicalTest – Sterndrive
(Autopilotsteering) 33
3.9 Rudder Angle Limit 33

1

1. System Description
The ST7000 is a modular automatic pilot system
that can be built up to match the individual
requirements of all types of vessels. A range of
high efficiency rotary, linear, and hydraulic rudder
drive units are available to match all types of
steering systems.
The ST7000 is SeaTalk compatible providing full
data sharing with Autohelm range of SeaTalk
instruments.
The control unit has a built in interface which will
accept navigation and wind angle data to
0180/0183 format.
A
fully comprehensive installation is shown below.
The most basic installation would consist only of a
central course computer, drive unit, fluxgate
compass, rudder reference unit and a single
control unit.
2

1.1.1 Course Computer
(Cat.No. Z083-12V Cat.No. Z084-24V)
The course computer houses the microprocessor,
electronic control circuitry and power amplifier for
the drive unit. The course computer is splash
proof only and must be mounted in a dry and
protected position. The course computer is
available for operation with 12V and 24V power
supply.
1.1.2 Control Unit (Cat. No. Z082)
The control unit is designed for above or below
deck mounting. The control unit accepts NMEA
0183 navigation and wind angle data input.
1.1.3 Fluxgate Compass (Cat. No. Z130)
The fluxgate compass has been especially
developed for marine application. The compass
contains a gimbal mechanism to permit accurate
readings with pitch and roll movements up to +35
deg. The compass is bulkhead mounted below
decks and connects directly to the course
computer.
The fluxgate compass may be mounted above
deck on steel vessels however autopilot
performance may be degraded due to the
increased motion.
3

1.1.4 Rudder Reference Transducer
(Cat. No. Z131)
The rudder reference transducer provides the
course computer with a precise rudder position. It
is mounted on a suitable base adjacent to the
rudder stock. The interconnecting cable connects
directly to the course computer connector unit.
1.1.5Auxiliary Alarm(Cat.No. Z035)
The autopilot is provided with an automatic off
course alarm system which sounds from all
control units and provides sufficient audible
warning under most conditions. In cases where a
high power alarm is necessary, an auxiliary alarm
can be fitted. The auxiliary alarm is connected to
the main connector unitvia a two core cable.
1.1.6 Masthead Transducer (Sail Only)
(Cat. No. Z080)
If the installation does not include an Autohelm
ST50 Wind Instrument the masthead transducer
can be connected directly to the course computer
to supply wind angle information.
4

1.1.7 Type CR Interface Unit
(Cat. No. Z085)
A standard ST7000 course computer can be
connected to the solenoids on a constant running
hydraulic power pack using the Type CR Interface
Unit. The unit also provides connections to
energise a solenoid operated bypass valve if
required.
5

1.2 Drive Systems
The ST7000 offers a choice of Mechanical or
Hydraulic Drive Units. All vessels with hydraulic
steering will require a hydraulic drive unit (see
section 1.2.3).
Mechanical steering systems may be driven with
either a rotary or linear drive unit. If space permits
the linear drive unit provides the simplest
installation by connecting directly to the rudder
stock tiller arm. It may also be used to power
steer the vessel ifsteering linkage failure occurs.
1.2.1 Rotary Drive Units
The Autohelm Rotary Drive Units provide smooth
powerful steering commands with virtually silent
operation.
A rugged electric motor drives a precision
epicyclic gearbox via a high tensile belt drive. An
electronic clutch is totally fail-safe yet transmits
high torque loads with no slippage.
The drive units can be mounted in any attitude
simplifying installation.
6