1.0 System Overview The Seakeeper Model 8000 Gyro uses gyroscopic principles to reduce boat roll motions in waves and wakes independent of boat speed. One Model 8000 Gyro will reduce the roll motions of a boat that displaces 15 to 25 tons. Boats with higher displacement typically require multiple gyros to provide good roll reduction. In multiple gyro installations, the gyros operate independently of each other and ...
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2 of 11 Section 1: SYSTEM OVERVIEW Seakeeper’s web site at www.seakeeper.com. The Seakeeper web site also contains videos of gyro operation and videos of several different boats operating in waves with the Model 7000 Gyro on and off. It is recommended that the reader play these videos prior to reading the remainder of this manual. The gyro’s gimbal angle and the gyro’s rate of rotation about the gimbal axis (termed precession rate) play an important role in its operation. These parameters are illustrated in Figure 2. At zero degree ...
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90141 3 3 of 11 Section 1: SYSTEM OVERVIEW Seakeeper gyro precession is actively controlled by an electronic controller and a hydraulic brake throughout each roll cycle so the gyro supplies the maximum anti‐roll torque and does not make mechanical contact with hard stops that limit the maximum gimbal angle travel to +/‐ 60 . ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 4 of 11 Section 1: SYSTEM OVERVIEW 1.1 Gyro Assembly The gyro assembly consists of a flywheel housed in a cast aluminum vacuum‐tight enclosure. The flywheel spins about a vertical axis and is supported by upper and lower pairs of bearings. A DC brushless motor mounted inside the enclosure spins the flywheel at high speed. ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 5 of 11 Section 1: SYSTEM OVERVIEW 1.2 Display The display shown below is the user interface to the Model 8000 Gyro and should be mounted at the primary helm station. It is used to start, operate, monitor and shutdown the Gyro. Sensors, alarms and shutdowns are provided to allow unattended operation. However the gyro is a high‐speed machine and special attention should be paid to vibration and noise as this could be the first hint of a mechanical problem. The display provides information in the event of an alarm. Alarms cause precession to stop (LOCK) and ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 6 of 11 Section 1: SYSTEM OVERVIEW 1.3 Compact Motor Drive Box The Compact Motor Drive Box contains the electronic components that take 208‐230 VAC at 50/60 Hz from the boat’s generator or shore power and supply current to the flywheel motor according to commands from the Gyro Control Box. The glycol/water mix that cools the gyro is also circulated through a cold plate inside the drive box to remove heat from hi‐power electronic components. ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 7 of 11 Section 1: SYSTEM OVERVIEW FIGURE 5 – COMPACT MOTOR DRIVE BOX (Left) FIGURE 6 – COMPACT MOTOR DRIVE BOX (Right) ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 8 of 11 Section 1: SYSTEM OVERVIEW 1.4 Gyro Control Box The Gyro Control Box contains motion sensors and a controller module that monitors and automatically regulates operation of the gyro. The motion sensor suite contains rate sensors that measure the angular movements of the vessel and accelerometers that measure the vertical and lateral boat movement. The controller commands the motor speed and regulates the gyro’s precession rate and gimbal angle. This is accomplished by commands to a high response flow control valve in the hydraulic brake circuit that increases or decreases brake pressure. FIGURE 7 – GYRO MOUNTED CONTROL BOX ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 9 of 11 Section 1: SYSTEM OVERVIEW 1.5 Brake The brake mechanism consists of two hydraulic cylinders which are mounted on the brake saddle beam and attach to a crank arm on the gyro gimbal shaft. The hydraulic cylinders are plumbed to a manifold / valve assembly so when the gyro rotates about the gimbal axis, oil from one side of each cylinder is pushed through the high response flow control valve into the same side of the other cylinder. The gyro controller modulates how fast the oil can flow through the control valve thus controlling the precession rate of the gyro. The brake hydraulic circuit is a pre‐charged closed loop – that is, there is no pump, motor or reservoir in ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 10 of 11 Section 1: SYSTEM OVERVIEW 1.6 Cooling The cooling circuit is a closed loop that supplies a glycol/water (50% distilled water and 50% glycol) mix to: The motor drive box to remove heat from the drive electronics The brake manifold to remove heat from the brake hydraulic circuit The gyro enclosure water jackets to remove heat from the flywheel bearings The heated fluid then passes through a thermostatic mixing valve before bypassing or flowing through a heat exchanger that has sea water on the cold side. The circuit also contains a coolant reservoir for coolant expansion and to make filling easy. The reservoir contains a 7 psi (0.5 bar) pressure cap. ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 11 of 11 Section 1: SYSTEM OVERVIEW FIGURE 10 – COOLING SYSTEM COMPONENTS (Gyro Enclosure Hidden) ...
90141 3 1 of 11 Section 2: SYSTEM OPERATION Introduction This section describes operation of the Seakeeper Model 8000 Gyro system. Display Screens: Overview 1) When 24 Vdc is applied to the Gyro Control Box the DISPLAY will power up and initialize. The SPLASH screen will be displayed 2) After the DISPLAY has initialized the HOME screen will be displayed 3) The DISPLAY has a set of five buttons that are under the BUTTON ICONS that appear on the ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 2 of 11 Section 2: SYSTEM OPERATION a. HOME Screen BUTTON ICON function GYRO ON/OFF and FAULT RESET 1. The ICON will change from red (GYRO OFF) to green (GYRO ON) 2. The ICON will turn red indicating the GYRO is off when a fault appears 3. When a FAULT occurs the BUTTON is used to reset the active fault GYRO LOCK/UNLOCK 1. When the GYRO control is initializing, or the GYRO off, the lock symbols will both be blue ...
Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 3 of 11 Section 2: SYSTEM OPERATION HOME SCREEN VIEW 1. Switches the HOME screen views from an animation screen, to a screen displaying arrows with no animation, to a screen that shows GYRO rate on a graph Home Screen with Animation: Home Screen with Arrows for Home Screen indicating Gyro Flywheel will be spinning and flywheel spinning and stabilizing Rate gyro stabilizing SETTINGS SCREEN ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 4 of 11 Section 2: SYSTEM OPERATION 4) When the button is depressed for the SETTINGS screen the DISPLAY changes to the SETTINGS screen a. SETTINGS screen BUTTON ICON functions Allows the brightness of the DISPLAY to be increased or decreased. The brightness settings for the DAY or NIGHT modes can be independently adjusted by selecting the DAY or NIGHT on the main page before entering the SETTINGS screen. ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 5 of 11 Section 2: SYSTEM OPERATION Adjusts the sleep function of the DISPLAY from one minute to 30 minutes or the DISPLAY screen on all of the time 1. When the button is depressed the DISPLAY SLEEP TIMER setting appears ...
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To scroll through the ALARM history the UP button and DOWN button are depressed ii. To change to the GYRO information screen the NEXT button is depressed iii. To change back to the SETTINGS screen the BACK button is depressed 6) The GYRO information screen displays the GYRO model, GYRO serial number, GYRO software version, DISPLAY software version, RUN hours, and SEA hours. This screen also allows Seakeeper Service personnel access to additional service functions. a. The RETURN button will return the DISPLAY to the SERVICE screen ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 7 of 11 Section 2: SYSTEM OPERATION Start‐up 1) Make sure AC and DC power are available. 2) Turn on the boat’s DC circuit breaker that supplies power to the Gyro Control Box. 3) Turn on the boat’s AC circuit breaker that supplies power to the Motor Drive Box. 4) In most cases, the seawater pump will be wired to turn on when the Gyro Control Box or Motor Drive Box is turned on. However, in some cases the seawater pump is on a separate AC or DC circuit breaker and it is necessary to turn it on. 5) When the DC power is turned on the DISPLAY will initialize and the HOME screen will appear. If a FAULT is present an ALARM screen will appear. To turn the GYRO ON depress the POWER ON/OFF FAULT RESET button, the button will turn GREEN, the flywheel will spin (or arrow appear), and a RED PROGRESS BAR will appear. The PROGRESS BAR indicates how soon the gyro will be available for stabilization. When the Gyro Control Box is initialized and when the GYRO is up to minimum operating speed the PROGRESS BAR will turn from RED to GREEN. At this point, the GYRO is available for stabilization. ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 8 of 11 Section 2: SYSTEM OPERATION 6) When the GYRO reaches its maximum operating speed where maximum stabilization is available, the PROGRESS BAR will disappear and the GYRO is available for maximum stabilization. Stabilization For stabilization at sea or at anchor after GYRO is ON and at speed: 1) Press the LOCK/UNLOCK button. The button will turn GREEN indicating that the Gyro is precessing and stabilizing the roll motion. The stabilizatoin mode starts gradually; it takes 5‐10 seconds to reach full effectiveness. ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 9 of 11 Section 2: SYSTEM OPERATION If it is necessary to shutoff power to the flywheel motor and slow the flywheel for any reason, press GYRO ON/OFF button; the button will turn RED and the LOCK/UNLOCK button will turn RED indicating the command has been accepted. It takes approximately 4.5+ hours for the speed to drop to zero rpm. ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 10 of 11 Section 2: SYSTEM OPERATION 2) Press LOCK/UNLOCK button. The LOCK symbol will turn RED 3) Press GYRO ON/OFF button. The ON/OFF symbol will turn RED 4) When the GYRO is turned off the flywheel is still spinning. When the flywheel has come to a complete stop 0 RPM will appear on the screen indicating that the flywheel has stopped. It can ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 11 of 11 Section 2: SYSTEM OPERATION The circuit breakers should be left on as long as possible while the gyro is spinning to remove heat from the gyro. During normal operation, the gyro should be stopped when pulling into port and stabilization is no longer required. This maximizes long term life as it allows the gyro to start the coast down cycle before cooling is shutoff. ...
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Section 3: POWER FAILURES, ALARMS, AND TROUBLESHOOTING Power Failures There are two sources of power to the Seakeeper Model 8000 Gyro system: 24 Volts DC powers the Gyro Control Box for all the control electronics. 208 ‐ 230 Volts AC powers the Motor Drive Box to drive the motor inside the Gyro. These are supplied on Cables 1 and 2 which are shown on Seakeeper drawing 90149, Cable Block Diagram. The Motor Drive Junction Box contains hazardous voltage and the cover should not be removed while the flywheel is spinning except by an authorized technician. This high voltage exists even if the flywheel is coasting ...
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If the AC voltage to the Motor Drive Box is outside Seakeeper’s specified range (208 – 230 VAC) or if the AC voltage fails for less than thirty seconds, the Motor Drive Box will briefly shut down for protection, but will reset itself and continue operating. In this case a “Drive Fault” alarm will not occur. The operator will not be aware of the power disturbance unless there are 4 power disturbances in 1 hour. In this case, a FREQUENT DRIVE RESET warning will be issued. If this warning occurs, Seakeeper recommends that the cause of this large voltage variation be investigated as it could damage electronic components on the boat. A brief fluctuation can happen when the generator is unable to regulate its output voltage, particularly ...
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Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 3 of 11 Section 3: POWER FAILURES, ALARMS, AND TROUBLESHOOTING The alarm will not clear until the reset condition listed on the table below is achieved and the operator presses the POWER ON/OFF button. The operator can then press LOCK/UNLOCK on the Display home page to continue stabilization. The Gyro will not automatically switch to POWER ON and UNLOCK. Display Description Reset condition Troubleshooting Indication ALARM 1 Refer to Seakeeper Drawing 90149 & verify: (1) boat Bearing 1 BEARING 1 Bearing 1 temperature seawater pump is on, (2) seawater supplied to gyro temperature above TEMP below 55 °C heat exchanger (3) gyro glycol pump is running, (4) no 80 °C HIGH glycol leaks. ALARM 2 Refer to Seakeeper Drawing 90149 & verify: (1) boat Bearing 2 BEARING 2 Bearing 2 temperature seawater pump is on, (2) seawater supplied to gyro temperature above TEMP ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 4 of 11 Section 3: POWER FAILURES, ALARMS, AND TROUBLESHOOTING Display Description Reset condition Troubleshooting Indication 1) Refer to Seakeeper Drawing 90149 Cable Block Gyro angle reading ALARM 19 Diagram and check sensor connector on Gyro Control less than ‐75° ANGLE Gyro angle reading Box. indicating sensor SENSOR above ‐75° 2) Refer to Seakeeper Drawing 90157 Model 8000 damage or a bad FAULT Gyro Assembly and Parts List under Port Side View and connection. confirm sensor is still firmly mounted to Gyro. ALARM 20 X X Rate sensor inside RATE Control Box not ...
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MODEL 8000 GYRO 90141 3 5 of 11 Section 3: POWER FAILURES, ALARMS, AND TROUBLESHOOTING Display Description Reset condition Troubleshooting Indication 1) Verify boat's AC breaker supplying power to the ALARM 33 Flywheel not Gyro is on. MOTOR spinning when RUN Motor off for 1 minute 2) Refer to Seakeeper Drawing 90149 Cable Block FAULT commanded. Diagram & check for AC power. 3) Check connectors on Motor Drive Box. ALARM 35 Display not Refer to Seakeeper Drawing 90149 Cable Block DISPLAY Display operational for 1 communicating with Diagram & check Display connector on Serial Comms FAULT minute Control Box Connection Box. ALARM 36 1) Check connectors on Motor Drive Box and Gyro Motor speed is over ...
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Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 6 of 11 Section 3: POWER FAILURES, ALARMS, AND TROUBLESHOOTING Display Description Reset condition Troubleshooting Indication Two of the four brake solenoid 1) Refer to Seakeeper Drawing 90149 Cable Block ALARM 46 valves are drawing Diagram & check connectors on Brake Solenoid Valves VALVE 1 Brake solenoid current more than 2.5A and on Gyro Control Box. CURRENT draw less than 2.5 A. indicating a bad 2) Contact Seakeeper distributor for brake circuit parts HIGH connection or a bad and service. valve. Two of the four brake solenoid 1) Refer to Seakeeper Drawing 90149 Cable Block ALARM 47 ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 7 of 11 Section 3: POWER FAILURES, ALARMS, AND TROUBLESHOOTING Display Description Reset condition Troubleshooting Indication 1) Refer to Seakeeper Drawing 90149 Cable Block ALARM 55 Gyro angle reading Diagram and check sensor connector on Gyro Control ANGLE above 81° sensor Gyro angle reading Box. SENSOR damage or a bad below 81° 2) Refer to Seakeeper Drawing 90157 Model 8000 FAULT connection. Gyro Assembly and Parts List under Port Side View and confirm sensor is still firmly mounted to Gyro. 1) Refer to Seakeeper Drawing 90149 Cable Block ALARM 56 Diagram and check sensor connector on Gyro Control ANGLE ...
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The Model 8000 Gyro issues a warning when it detects a malfunction that is not hazardous (but still should be corrected). Warning messages are displayed on the fault history page. Display Description Reset condition Troubleshooting Indication WARN 128 Enclosure pressure Enclosure pressure less VACUUM Contact Seakeeper distributor for service more than 60 torr than 30 torr LEAK WARN 129 BEARING 1 Bad sensor or bad Refer to Seakeeper Drawing 90149 Cable Block Functioning sensor SENSOR connection Diagram & check connector on Gyro Control Box ...
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WARN 139 shore power FREQUENT transfers or voltage (none) Verify AC power source is stable. DRIVE dips due to switching RESET large generator loads. Four AC power disturbances in one hour produce this warning. WARN 140 BEARING 1 Bad sensor or bad Refer to Seakeeper Drawing 90149 Cable Block Functioning sensor SENSOR connection Diagram & check connector on Gyro Control Box FAULT WARN 141 BEARING 2 Bad sensor or bad Refer to Seakeeper Drawing 90149 Cable Block Functioning sensor SENSOR connection Diagram & check connector on Gyro Control Box FAULT WARN 142 BEARING 3 Bad sensor or bad Refer to Seakeeper Drawing 90149 Cable Block Functioning sensor ...
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OPERATION MANUAL MODEL 8000 GYRO 90141 3 10 of 11 Section 3: POWER FAILURES, ALARMS, AND TROUBLESHOOTING Display Description Reset condition Troubleshooting Indication WARN 148 X ACCEL Bad sensor or bad Functioning sensor Contact Seakeeper distributor for service SENSOR connection FAULT WARN 149 Y ACCEL Bad sensor or bad Functioning sensor Contact Seakeeper distributor for service SENSOR connection FAULT Alarm and Warning History The Service page on the Display shows the recent alarms and warnings. The alarms are in chronological order starting with the most recent. 1) From the Home Screen at the Display, go to SETTINGS screen by depressing the SETTINGS screen key and then go to the SERVICE screen by depressing the SERVICE screen key ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 11 of 11 Section 3: POWER FAILURES, ALARMS, AND TROUBLESHOOTING 3) A view of a typical ALARM screen. If the ALARM appears and there is an INFORMATION button on the screen the ALARM has more information associated with it. By depressing the INFORMATION button the INFORMATION screen will appear. ...
MAINTENANCE The gyro system is designed to require as little maintenance as possible. However, since the system is comprised of mechanical and electrical components that operate in a marine environment, some periodic inspections and maintenance are recommended. Seakeeper recommends an annual inspection and a 2000 hr service interval to keep the gyro running trouble‐free. If the gyro is installed in a wet space, efforts should be made to keep gyro free of salt residue from either condensation or direct exposure to salt spray. If exposed, a regular wipe down with mild soap ...
Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 2 of 3 Section 4: MAINTENANCE 4.4 SCHEDULED MAINTENANCE TABLE The following pages contain the scheduled maintenance table organized by systems: Mechanical, Hydraulic, Cooling, and Electrical. PARTS / SPECIAL SYSTEM / COMPONENT TASK PER SERVICE BULLETIN 90133 INTERVAL TOOLS Inspect unit for severely corroded Mechanical / Corrosion areas and clean and touch up with Annual paint. See Service Bulletin 90026. ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 3 of 3 Section 4: MAINTENANCE SYSTEM / COMPONENT TASK PER SERVICE BULLETIN 90134 INTERVAL PARTS / SPECIAL TOOLS Hydraulic hand pump kit, Replace brake bushings, hydraulic Brake bushing replacement accumulators and check valves, and Mechanical / Hydraulic Brake 2000 hrs tool kit, Hydraulic brake parts flush hydraulic oil. kit Fill reservoir or jug and Cooling system flush Cooling / System 2000 hrs tubing, antifreeze Check internal circulator fan inside Electrical / Motor Drive 2000 hrs Motor Drive J‐Box. ...
Seakeeper, accompanied by a Return Material Authorization (RMA) issued by Seakeeper's facility responsible for supplying Goods, with transportation prepaid by Buyer/User, with written specifications of the claimed defect. If a warranty claim is valid, Seakeeper shall pay reasonable one‐way costs of transportation of the defective Goods from either the original destination or the location where defect occurred, whichever is closest to Seakeeper's facility. ...
Except where otherwise expressly agreed, all patterns, tools, jigs and fixtures, drawings, designs, software and other materials and data developed, fabricated by Seakeeper shall be and shall remain Seakeeper's property. Except as specifically provided for in the order, Buyer shall have no right in any technical data, Intellectual Property Rights, and computer software associated with the order. Buyer ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 1 of 3 Section 6: GYRO SPECIFICATIONS Model 8000 Gyro Specifications & Summary Rated RPM 8,000 RPM Angular Momentum at Rated RPM 8,000 N‐M‐S Anti‐Rolling Torque at Rated RPM 17,143 N‐M Spool‐up Time to Rated RPM 35 Minutes Spool‐up Time to Stabilization (75% Rated RPM) 20 Minutes Spool‐up Power AC Motor 3000 Watts Max DC Motor 240 Watts Operating Power AC Motor (Sea state dependent) 1500‐2500 Watts DC Control 240 Watts Voltage AC Input 208‐230 VAC (±10%), 50/60 Hz, Single Phase ...
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Arrangement The Model 8000 Gyro System consists of the Gyro unit, Motor Drive Box, Gyro Control Box, Cooling Loop Components, Display, and Cables (for cables not supplied by Seakeeper, refer to Seakeeper Drawing 90149). Installation Location The Gyro is a torque device and does not have to be installed in a specific hull location or on the ...
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Product: Document #: Rev: Page: OPERATION MANUAL MODEL 8000 GYRO 90141 3 3 of 3 Section 6: GYRO SPECIFICATIONS Operator Controls An Operator’s Display is provided to start, operate, monitor, and shutdown the Gyro. Performance Gyro reduction of boat roll is a function of the boat’s displacement, transverse metacentric height (GM ) and hull damping as well as the operating conditions (speed and heading with respect to waves) and sea state. The Gyro controller regulates the active hydraulic brake to ensure the Gyro’s anti‐roll torque is maximized irrespective of hull characteristics or operating conditions. In heavy seas, the Gyro rpm may droop when the required power exceeds 2500 watts – this is normal and is designed to limit large power demands at the expense of a small loss of performance Alarm and Monitoring Sensors, alarms and shutdowns are provided to allow unattended operation. Sensors measure flywheel bearing temperatures, motor and drive temperatures, vacuum pressure, gimbal angle, brake pressure, and ship motion. The Gyro controller sends sensor values and alarm information to the display and also locks the brake and shuts down the motor drive in the event of an alarm condition. Gyro operating history during faults or alarms is recorded in the controller’s memory for subsequent recall if service is ...
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