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COURSEMASTER CM82i System Manual

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COURSEMASTER
AUTOPILOTS
Australia's world leader in autopilot technology
CM82i SYSTEM MANUAL
11-09

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Summary of Contents for COURSEMASTER CM82i

  • Page 1 COURSEMASTER AUTOPILOTS Australia's world leader in autopilot technology CM82i SYSTEM MANUAL 11-09...
  • Page 2 Phone +612 9417 7097 +612 9417 7557 E-mail sales@coursemaster.com Website www.coursemaster.com Copyright 2009. This manual, the mechanical and electronic design of the CM82i autopilot system and its associated software are protected by copyright. Unauthorised copying may result in prosecution. 11-09...
  • Page 3 QUICK START • Press the STANDBY key to turn the system on. • Hold down the STANDBY and PILOT keys together to turn the system off. • Steer to the desired course and press PILOT. • Use the arrow keys to change course. •...

  • Page 4: Table Of Contents

    1.1.1 Conventional autopilots 1.1.2 Steering Control 1.1.3 The ‘intelligent’ autopilot 1.1.4 Course holding and turning 1.1.5 Options 1.1.6 Working with other Equipment 1.2 The CM82i System 2. OPERATING INSTRUCTIONS 2.1 The Control Head 2.2 Getting Started 2.3 Normal Operation Switching on...

  • Page 5: Quick Reference

    CONTENTS TROUBLE-SHOOTING 4.1 General 4.2 Error messages 4.3 Other faults 4.4 Fuses SYSTEM SPECIFICATIONS MAINTENANCE AND WARRANTY QUICK REFERENCE INSTALLATION • Mount the Junction Box as described in Sect 3.1 • Mount the Control Head as described in Sect 3.2 •...
  • Page 6 THE MENU BACKLIGHT NORMAL/ROUGH RUDDER FACTOR RATE FACTOR RATE GYRO ON/OFF HEADING CONTROL HEADING ADJUST AUTO COMP CALIB MANUAL COMP CALIB MAG VARIATION HEAD COMP/HDG/HDT RUDDER CONTROL HELM LIMITS TURN RATE LIMITS AUTO BALANCE ON/OFF STEER DRIVE HELM ALERT OTHER OPTIONS NMEA OUT HDG/HDT PILOT DISPLAY A/B COMPASS VOLTAGES...

  • Page 7: System Description

    1 SYSTEM DESCRIPTION 1.1 INTRODUCTION TO AUTOPILOTS The main function of a marine autopilot is to hold the heading of a vessel on a reference course which is held in the memory of the autopilot. When it is operating, the autopilot continuously compares the vessel’s heading with a reference course, and if they are different, it applies helm to bring the vessel back on course.

  • Page 8: Steering Control

    System Description 1-2 The four basic components are a compass, an electronic control box, a rudder angle sensor (transducer) and the steering drive. A Junction Box, mounted below decks, contains most of the system electronics and a Control Head, mounted at the steering station provides the interface with the user. Modern autopilots perform other functions as well and this introduction explains how these fit in with the basic function and how they provide a wider range of options for the user.
  • Page 9 System Description 1-3 OVERSTEER REFERENCE COURSE UNDERSTEER Figure 1.2. Illustration of oversteer if the rudder factor is set too high and understeer if it is set too low. Counter Rudder Counter Rudder, or rate feedback, compensates for turning inertia and is generally used in vessels above 8 m length.

  • Page 10: The 'Intelligent' Autopilot

    1.1.4 COURSE HOLDING AND TURNING The CM82i is mainly intended for vessels in the 5 - 10 m range, usually with outboard motors. These vessels have two features that affect course holding and turning. First, they are more responsive to wind load and wave effects than heavy vessels and can yaw quickly when hit by a wind gust, for example.

  • Page 11: Options

    1.1.5 OPTIONS As an alternative to using the standard rate gyro compass, the CM82i has an option to use a digital heading input, which would typically come from a GPS compass. Note that the course-over-ground data available from GPS navigation systems does not respond quickly enough to be used as the primary heading input.

  • Page 12: The Cm82I System

    System Description 1-6 1.2 THE CM82i SYSTEM The core of the CM82i system consists of Control Head, Junction Box, Rate Gyro Compass and Steering Drive. The system, together with its optional attachments is illustrated in Fig 1.2 below. CM840 JUNCTION BOX...
  • Page 13 Steering Drive The autopilot is intended for hydraulic steering systems, of which there are a number of options. A suitable drive may either by supplied by Coursemaster or the autopilot may be connected to an existing steering drive on the vessel.

  • Page 14: Operating Instructions

    The display screen of the Controller (Fig 2.1) shows digital and text information about the current operation of the autopilot. There are four keys which control the operation and the functions of these keys are described below. COURSEMASTER System Mode STBY...

  • Page 15: Getting Started

    Operating Instructions 2-2 ______________________________________________________________ 2.2 GETTING STARTED Before operating the autopilot for the first time, it must be installed and adjusted as described in Chapter 3. (If optional attachments are being used, these can be fitted after initial trials of the system.) To switch on for the first time, press the STANDBY key.

  • Page 16: Normal Operation

    Operating Instructions 2-3 ______________________________________________________________ Then press STANDBY again to calibrate the steering drive. Centre the helm. Then watch the steering gear as you press the right arrow. It should move a few degrees to starboard for each press of the key. If it moves the wrong way, switch off the system and reverse the motor lead connections.

  • Page 17: Switching Off

    Operating Instructions 2-4 ______________________________________________________________ If a fault is detected during the self test, the Controller starts beeping and the type of the fault is displayed after the self-test period. SWITCHING OFF Switching Press the STANDBY and PILOT keys together. With the system in STANDBY, steer the vessel to the desired Autopilot heading and press PILOT.

  • Page 18: Adjusting The Course

    Operating Instructions 2-5 ______________________________________________________________ To adjust the current reference course, press either the left or Adjusting right arrow key. A single press changes the course by 1 degree. the course Holding a key down changes the course continuously in 10 degree steps.

  • Page 19: The Menu

    Operating Instructions 2-6 ______________________________________________________________ THE MENU BACKLIGHT NORMAL/ROUGH RUDDER FACTOR RATE FACTOR RATE GYRO ON/OFF HEADING CONTROL HEADING ADJUST AUTO COMP CALIB MANUAL COMP CALIB MAG VARIATION HEAD COMP/HDG/HDT RUDDER CONTROL HELM LIMITS TURN RATE LIMITS AUTO BALANCE ON/OFF STEER DRIVE HELM ALERT OTHER OPTIONS NMEA OUT HDG/HDT...
  • Page 20 Operating Instructions 2-7 ______________________________________________________________ BACKLIGHT The backlight for the display can be set to 4 different brightness levels. Use the arrow keys to adjust. CONTROL MODE The system is preset to the NORMAL mode, but may be changed to operate in ROUGH Use the arrow keys to select between the following: NORMAL...
  • Page 21 Operating Instructions 2-8 ______________________________________________________________ HEADING CONTROL GROUP HEADING ADJUST The current fluxgate heading is displayed and compass mounting errors may be compensated using the arrow keys. RATE GYRO The Rate Gyro option is turned on, assuming that a CM437 is fitted. If rate gyro is selected, but not operating correctly, the heading display will lag behind the actual heading by 2 seconds or more, resulting in poor heading control.
  • Page 22 Operating Instructions 2-9 ______________________________________________________________ Note. If the rate gyro is turned ON, we recommend turning it OFF during auto calibration and then turning it ON upon completion. MANUAL Press the RIGHT ARROW when this message appears. COMPASS main digital heading shows the current heading and the CALIBRATION message line reads: DEV +00...
  • Page 23 For high-speed vessels, you may wish to reduce the setting below its preset value . AUTOBALANCE As mentioned in Sec 1.1.3, the CM82i includes a feature ON / OFF whereby the system compensates automatically for propeller torque effects. This compensation may be turned on or off with this option.

  • Page 24: Alarms

    SETUP mode. 2.5 ALARMS The CM82i System has a number of alarm functions. When an alarm occurs, the beeper sounds and an alarm message flashes on the display. To cancel an alarm, press the STANDBY or PILOT key.

  • Page 25: Recommended Settings

    Operating Instructions 2-12 ______________________________________________________________ attempts to clear the fault. If it succeeds, the alarm symbol will disappear after 30 seconds. OFF COURSE The vessel has been more than 8 deg off course for 30 seconds. This only operates in the PILOT mode and while the alarm is active, all other functions operate normally. Cancel it by returning to course or pressing the STANDBY or PILOT key.
  • Page 26 Operating Instructions 2-13 ______________________________________________________________ A rudder factor of 4 applies a nominal 0.5 degree of helm for each degree off course. The Rate Factor compensates for turning inertia in the vessel and its choice is affected by both the displacement of the vessel and its directional stability. If 10 degrees of helm is applied and the turn is established within 1 to 3 seconds, then a Rate Factor of 2 is suitable.

  • Page 27: Installation

    3 INSTALLATION Before proceeding with the installation, check the contents of the shipment to ensure that all components ordered are present and undamaged. Read all of this chapter before starting and then follow this step-by-step guide: 1. Mount the Junction Box as described in Sect 3.1. Check that vessel voltage is 12volt DC.

  • Page 28: Junction Box

    Installation ______________________________________________________________________ 3.1 JUNCTION BOX The Junction Box should mounted on a vertical surface with the cable entry holes facing downwards. It should be protected from the weather and be well above the bilge water level in the vessel. Do not mount it in the engine room or other high- temperature location.
  • Page 29 Figure 3.1 Layout of CM 840 Junction Box components and connectors. Note that the CM840 Junction Box is common to several autopilot systems and may have sockets which are not used in the CM82i system. POWER MOTOR + MOTOR -...

  • Page 30: Control Head

    Panel Panel Figure 3.3 Panel mounting of the CM82i Control Head. Lay the Controller cable back to the Junction Box, feed it through a grommet into the case and terminate the wires and cable screen in the Controller plug. Tighten each grub-screw firmly.
  • Page 31 Installation ______________________________________________________________________ SCREEN SCREEN BLUE BLUE WHITE CONTROLLER WHITE BLACK CABLE BLACK GREEN GREEN Figure 3.4 Controller cable connections. To minimise the risk of radio interference, the Controller cable, like the others, must be kept well separated from antennas and antenna feeds. On some vessels this is difficult to do, but some extra effort to maintain separation will reduce problems in the future.
  • Page 32 Figure 3.5. Connections for a CM437 Rate Gyro Compass. Steel Vessels Though the CM82i autopilot is intended for smaller vessels, which are unlikely to be steel, the following notes may be useful in some cases. Steel hulls distort the natural pattern of the earth's magnetic field. In many cases these deviations can be adjusted out through the calibration procedures.

  • Page 33: Nmea Interfaces

    Installation ______________________________________________________________________ If no position is found giving less than 20 deg deviation, the services of a compass adjuster should be sought. The autopilot will not operate satisfactorily with compass deviations above 20 deg. A compass calibration (See Sec 2.5) is recommended after the installation is complete.

  • Page 34: Steering Drive

    ______________________________________________________________________ 3.5 STEERING DRIVE The CM82i system is intended for use with existing hydraulic steering systems. If the CM82i is fitted to a power steering system with solenoid controls, the power steering system must be fitted with a suitable pressure relief valve to prevent damage to the steering if it is driven into the steering stops.
  • Page 35 Installation ______________________________________________________________________ Typical Steering Systems Two-line systems are by far the most common and are manufactured by many companies worldwide. The best known types include Hydrive, Marol, Morse, Seastar, Seipem, Tenfjord, Teleflex and Vetus. Hydrive Helm Pump or similar, with lock valve Steer Pump Figure 3.7 Connection to a typical two-line system Some two-line systems are supplied with a lock valve as part of the helm pump and no...
  • Page 36 If the pump fails to run, check first that it is receiving the correct drive voltage from the Junction Box. If the pump runs but does not pump oil, make sure that the system is purged. If that does not succeed, contact your Coursemaster dealer.

  • Page 37: Trouble-Shooting

    CHAPTER 4 TROUBLE-SHOOTING 4.1 GENERAL If no error messages are showing, but the performance of the autopilot is unsatisfactory, experience suggests looking initially at three factors. The compass heading should be steady. Small deviations in the heading will not cause performance problems, but random changes in heading of more than a degree or two indicate a defect in the compass performance.

  • Page 38: Error Messages

    4.2 ERROR MESSAGES The CM82i system is programmed to provide a number of messages on its display when a fault occurs. Some of these are warnings which relate to the way the autopilot is being used. Others mean that a real problem has developed. A full list appears in Sec 2-6.

  • Page 39: Other Faults

    Trouble-Shooting ____________________________________________________________________________________ DRIVE OVERLOAD The system is in PILOT or one of the power steer modes and the motor drive current has exceeded 20A for 1 second. The response to a drive short-circuit is immediate. The system is forced into STANDBY and the message can only be cleared by pressing the STANDBY key after the overcurrent condition is removed.

  • Page 40: Fuses

    STANDBY to PILOT. In such cases, the Junction Box should be returned to your dealer or to Coursemaster for repair. Slow Compass Response If the displayed heading is slow to respond to the actual heading and this is accompanied by poor course holding, there could be a Rate Gyro fault.
  • Page 41 5 SYSTEM SPECIFICATIONS AUTOPILOT Supply Voltage Range (nominal) 12 to 14V dc Maximum Supply Voltage Range 10 to 16V dc Supply Current Basic system in STANDBY 0.33A In Pilot with 20% duty 2.5A Compass Combination Fluxgate and Rate Gyro. Typical deviation 2.5 deg rms.

  • Page 42: System Specifications

    System Specifications 5-2 Recommended rudder response times: Hull length up to 11 m 8 sec. for -20 to +20 deg swing. Hull length 11 to 13 m 10 sec. for -20 to +20 deg swing. Hull length above 13 m 12 sec.
  • Page 43 System Specifications 5-3 AUTOMATIC SENTENCE SELECTION For navigation inputs, the system looks for sentences in this order: BOD and XTE The search stops when the highest sentence in the above list is found. If cross- track data, for example, is missing, the autopilot operates from the heading-to- steer data alone.
  • Page 44 Coursemaster dealer for cleaning and rectification. 6.2 INSTALLATION OF NEW SOFTWARE It is recommended that software upgrades be installed by a Coursemaster dealer, but if this is not possible, the following procedure should be followed carefully by the owner.
  • Page 45 The defective item shall be returned. ‘freight pre-paid’ to Coursemaster. A return Australian address shall be provided to enable the repaired item to be returned by road freight. Coursemaster shall not be liable for the cost of removing or refitting the item to the vessel.

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