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Chapter 2: Autopilot Operation 8-2-23
ST290 Instrument System Owner’s Handbook
2.9 Adjusting the rudder gain
WARNING:
1. Incorrect rudder gain values on planing craft will lead to poor
steering performance and can be dangerous at high speeds. You
must set the rudder gain correctly.
2. If you increase the rudder gain setting on a 150G or 400G
autopilot, you must also increase the counter rudder setting.
Note: Although the rudder gain feature is available on all systems, you
should not need to adjust the rudder gain setting on 150G or 400G auto-
pilot systems once AutoLearn has been completed (see Section 8,
Chapter 4).
On T150 and T400 (non-GyroPlus) systems, you can make temporary
adjustments to rudder gain to change the autopilot’s steering
characteristics.Rudder gain is a measure of how much helm the autopilot
will apply to correct course errors (see Figure 2-20 ):
• If rudder gain is adjusted correctly, the course changes should result
in a crisp turn followed by an overshoot of no more than 5°
• If rudder gain is toohigh, courses change will result in a distinctover-
shoot (
A)
• Ifrudder gain is too low,the boatwill feelsluggish – it willtake a long
time to make the turn and there will be no overshoot (
B)
Figure 2-20: The effect of incorrect Rudder Gain settings
Note: See Section 8, Chapter 5 for a full explanation of rudder gain and
how to adjust it correctly.
New
heading
New
heading
A
New
heading
B
Correct
rudder gain
Rudder gain
too high
Rudder gain
too low
D3262-2
81183_2 S8.book Page 23 Tuesday, May 6, 2003 9:08 AM
- ST290 Instrument System 1
- Important information 2
- An Introduction to ST290 6
- 1.1 System overview 7
- System buses 8
- Digital instruments 8
- Analog instruments 8
- System data inputs 9
- Get-you-home mode 9
- Remote operation 10
- Autopilot control 10
- Backlighting 10
- Contrast 10
- Operating profiles 11
- 1.2 Setup requirement 12
- 1.3 System upgrades 13
- 1.4 Specifications 14
- Data Processing Unit 16
- Transducer Pods 16
- Approvals 16
- Contents 17
- DEPTH FT 20
- DataGraphic 21
- PROFILE 21
- SAIL 21
- Chapter Select mode 22
- Edit mode 22
- Switch on 22
- Normal mode 22
- Chapter select mode 23
- Alarm mode 23
- 1.3 Instrument setup 24
- Favorite chapter 25
- Transducer calibration 26
- Autopilot setup 26
- 1.5 Icons 27
- 2.2 Operation 29
- NAVIGATION 31
- Previous chapter 31
- Current chapter 31
- Next chapter 31
- Changing displayed values 32
- Animated graphic pages 33
- Wind shift display 34
- Docking display 35
- Using Favorite pages 36
- Favorite page 37
- Favorite 37
- Speed chapter 38
- Depth chapter 39
- Heading chapter 40
- Wind chapter 40
- Navigation chapter 41
- GPS chapter 42
- Pilot chapter 42
- Timers chapter 42
- Alarm clock 43
- Countdown timer 44
- Stopwatch/lap timer 44
- Engine chapter 45
- Alarms chapter 46
- Environment chapter 47
- Vessel chapter 48
- User Setup chapter 48
- Graphic Display: Full Profile 49
- Graphic Display: Sail Profile 50
- Upper display active 53
- Lower display active 53
- FAVORITE U 55
- ROLLOVER SEC 55
- Navigate chapter 58
- Enabling alarms 64
- Data Display: Full Profile 67
- Data Display: Sail Profile 68
- Data Display: Power Profile 69
- Instruments 71
- 1.3 Display illumination 72
- ° , whereas the Close Hauled 73
- ° to +60° about 73
- Wind speed 75
- Hold down 75
- Silencing an alarm 76
- Chapter 3: Compass Instrument 77
- Digital display 78
- Figure 3-2: Basic operation 79
- Locked mode 80
- Auto mode 81
- Operating hints 82
- °to +40°about zero 83
- Section 4: Using Keypads 84
- 1.1 Keypad types 85
- Chapter 2: Remote Keypad 86
- 2.2 Remote operation 87
- Button function 88
- Chapter 3: MOB Keypad 89
- Cancelling a MOB condition 90
- 1.1 Maintenance 92
- 1.2 Troubleshooting 93
- Fixing faults 94
- Autopilot troubleshooting 94
- 1.3 Technical support 95
- Section 6: Installation 97
- 1.1 Introduction 99
- 6-1-2 Section 6: Installation 100
- 6-1-4 Section 6: Installation 102
- 1.2 Planning the installation 104
- 5.12 in (130 mm) 105
- 5.9 in (150 mm) 1.53 in 105
- 2.6 in (66 mm) 106
- 4.61 in (117 mm) 106
- 1.42 in (36 mm) 106
- Instruments & keypads 107
- 4.88 in (124 mm) 108
- 2.2 in (56.5 mm) 108
- 0.8 in (20 mm) 108
- Cable lengths 109
- Speed and Depth 110
- 1.3 SeaTALK 112
- requirements 112
- 1.4 System structures 113
- Power supply 114
- Typical ST290 systems on 115
- products with 117
- 2.1 Introduction 118
- SeaTalk connector 119
- Procedure 120
- 2.3 Cable preparation 122
- Red or Black wire 123
- All other wires 123
- Connections to DPU 125
- Miscellaneous 126
- NMEA data 127
- Speed & Depth 128
- Wind transducer 129
- Fitting transducer 130
- Running transducer cable 131
- 2.6 Fitting transducer Pods 132
- Connecting Pods 134
- Figure 2-17: Wiring a Pod 135
- Replacing Pod cover 136
- General requirements 136
- Mounting options 136
- Instrument & keypad seals 137
- Procedures 137
- 2 Cut four holes for corners 138
- 3 Cut hole for instrument 139
- 1 Remove template from 140
- Made-up cables 142
- Unterminated SeaTALK 142
- 2.8 Making power connections 144
- 2.9 Preparing ST290 for use 147
- Setup requirements 148
- EMC Conformance 148
- Section 7: System Setup 149
- Chapter 1: Setup overview 152
- 1.2 Digital instruments 153
- Display responses 154
- Favorite pages 154
- Display options 155
- Calibrating transducers 155
- Setting up autopilot 156
- Data units 156
- Backlighting setup 156
- 1.3 Analog instruments 157
- 2.1 Starting setup 158
- User Setup 160
- Setting response values 161
- Setting update rate 161
- 2.3 Setting up Favorite pages 162
- Define Favorite rollover 163
- Choosing a profile 164
- Editing Custom profiles 165
- Chapter edit menu 166
- Use these to select 166
- Editable field 166
- Page edit 167
- Adding a new page 167
- Page name 168
- Selected chapter 168
- 2.5 Display options 169
- General options 170
- Setting trip counters 171
- Setting race timers 171
- Setting data resolution 172
- Setting date and time 173
- Position logging interval 174
- Requirement 175
- VARIATION 176
- SWING VANE 176
- ALIGN VANE 176
- SWING COMPASS 176
- ALIGN HEADING 176
- Compass calibration 177
- Setting compass alignment 178
- Setting system variation 179
- Wind vane 180
- Aligning 181
- Speed calibration principles 182
- Depth transducer offset 184
- General offsets 186
- Set water temperature 187
- Set system voltage reading 187
- 2.7 Pilot setup 188
- 2.8 Data Units 188
- 2.9 Backlighting setup 189
- 2.10 Leaving setup 190
- SPEED KTS 191
- USER SETUP 191
- RESPONSE 192
- WIND ANGLE 192
- User Setup mode 193
- USER SETUP chapter 193
- User (setup entry screen) 193
- FAVORITES 195
- AV SPEED KTS 196
- Editing the Custom profile 197
- OPTIONS 198
- Setting race gun timers 199
- REM GROUP 200
- REM SEQUENCE 200
- REM LINK 201
- UNITS 201
- 3.7 Backlighting setup 202
- 3.8 Leaving setup 202
- 4.1 Introduction 203
- 4.2 Analog instrument setup 203
- 7-4-2 Section 7: System Setup 204
- Compass instrument 205
- 7-4-4 Section 7: System Setup 206
- Section 8: Autopilots 207
- 1.1 Applicability 211
- 1.2 Autopilot operating modes 211
- Autopilot functions 212
- 1.3 Safety information 213
- 2.2 Using the Pilot Keypad 214
- 2.3 Display layout 215
- Pop-up message modes 216
- DISP button once. All ST290 217
- STANDBY: 218
- Adjusting autopilot response 219
- RESP button 220
- STANDBY to return to hand 222
- +10 three times) 223
- -1 and -10 buttons together 224
- +1 and +10 buttons together 224
- Preventing accidental gybes 225
- Gusty conditions 225
- TRACK to enter Track mode 226
- Exiting Track mode 227
- Cross track error 227
- Tidal stream compensation 228
- Waypoint arrival and advance 229
- TRACK for 230
- TRACK to turn the 230
- Safety in Track mode 231
- Introduction 231
- Selecting Wind Vane mode 232
- -1, +1, -10 and +10 233
- -1,+1,-10 and+10 buttons 234
- 2.9 Adjusting the rudder gain 236
- 3.1 Introduction 238
- Fault Possible cause Action 239
- STANDBY to clear 241
- Alarm message Cause Action 241
- 3.4 Product support 243
- STANDBY and AUTO 245
- Using the Calibration mode 247
- Rudder limit 248
- Setting the vessel type 249
- Setting the rudder offset 250
- Setting the rudder limit 250
- Setting the rudder damping 251
- Save the new settings 251
- STANDBY, on the Pilot Keypad 252
- Turn boat in slow circles so: 255
- At least 0.04 nm (100 m) 257
- STANDBY button 259
- Manual set-up 260
- A in Figure 4-10 ) 261
- B in Figure 4-10 ) 261
- 5.1 Introduction 264
- 5.3 Pilot Basic Calibration 265
- AutoTack angle 266
- Gybe inhibit 267
- Wind mode 267
- WindTrim response 268
- Response level 268
- Calibration structure 270
- 8-5-8 Section 8: Autopilots 271
- SeaTrial Calibration lock 272
- Vessel type 272
- Drive type 273
- Rudder offset 273
- Rudder gain 274
- Counter rudder 275
- Rudder damping 275
- Rudder trim 276
- Turn rate limit 278
- Off course warning angle 279
- AutoRelease (I/O drives only) 279
- Cruise speed 282
- D3263-2P 283
- Latitude 284
- Autopilot reset 285
- Advanced Calibration options 287
- Section 9: Glossary 288
- Glossary 289
- 9-1-2 Section 9: Glossary 290
- Section 9: Glossary 9-1-3 291
- Section 10: Index 292
- Section 10: Index 10-1-1 293
- ST290 Owner’s Handbook 293
- 10-1-2 Section 10: Index 294
- Section 10: Index 10-1-3 295
- 10-1-6 Section 10: Index 298
- Section 10: Index 10-1-7 299
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