Actuator Auto Lock; Figure 4.2.6 Magnetic Circuit - Fujitsu M2361A Customer Engineering Manual

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Figure 4.2.6 Magnetic circuit
(2) Drive coil
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obbin
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The two coil bobbins are identical. A pair of flat copper wire coils are
attached on the top and bottom of each coil bobbin. The four coils are
then connected in series to generate torque in the same direction due to
the current flowing in each coil.
(3) Crash stop
The crash stop consists of a moving part attached to the bobbin supporting
base and fixed parts on the DE. It determines the movable range of the
head-arm assembly, and provides safe deceleration in the event of an
uncontrolled seek.
4.2.4 Actuator auto lock
During transportation, all heads must be placed wi thin the CSS zone to prevent damage
to the data area. For this purpose, the M236lA has an auto lock mechanism for the
rotary actuator outside of the DE. See Figure 4.2.7.
(1) Locked (Power off)
4 - 8
The magnet plunger locks the auto lock arm whenever the power ( ± 24VDC) is not
supplied. The rotary actuator cannot move because its stopper pin is locked
in place to the inner stopper.
B03P-4825-0002A ... OIA