DOCUMENT # 90021, REV 4 MODEL 7000 GYRO OPERATION MANUAL-MAR09
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To turn on stabilization,
the rpm must be above 7500
.
•
Depress Sea
The Lock light will go out and the Sea button will
illuminate indicating that the Gyro is precessing and
stabilizing the boat’s roll motion. The Controller
increases the overall gain slowly; it takes 5-10 seconds
to reach full effectiveness.
!
If it is necessary to stop precession for any reason
depress the Lock button. The light on the Sea button
will go out and the light on the Lock button will
illuminate indicating that the Gyro is Locked. There
is still a very large torque about the Gyro’s gimbal
axis and no one should ever attempt to work on the
gyro until the flywheel has stopped spinning. In the
event, that the Gyro Controller has automatically
locked the gyro due to an alarm or failure, no attempt
should be made to bypass the alarm or automatic
Lock.
In some cases (such as on anchor at night) the sea
condition may be very calm and the Gyro is only
required to damp motions associated with light swell or
with the wakes from passing boats. In these situations,
the operator can Run the Gyro at 8000 rpm to reduce
gyro noise and power consumption without significantly
reducing performance (i.e., roll reduction).
When the operator first depresses the Run button on the
Keypad, the gyro will start accelerating to full speed
(9700 rpm). To reduce the Gyro’s speed to 8000 rpm,
go to the Speed Command page on the Gyro Display. If
it reads 9700 rpm depress the Down button to set the
speed command to 8000 rpm. If it reads 8000 rpm and
you want to go to 9700 rpm then depress the Up button
to increase the speed command to 9700 rpm.
