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1.2.3
Dc Direct Drive Spindle Motor
The dc direct drive motor
assembly.
This dc motor eliminates the problems that are
associated with conventional ac motor drives.
•
The motor does not use drive pulleys or belts, elim
inating the problems associated with these parts.
•
The motor consumes less power than conventional ac
motors.
be used.
•
The motor uses direct current, so that there are no
concerns about voltages and frequencies.
•
The
motor
units.
The spindle motor has an up-to-speed time of 700 ms.
1.2.4
Carriage Read/Write Assembly Heads
The read/write heads touch each side of the flexible disk,
allowing data to be written to the flexible disk and to be
read from it.
carriage assembly that shifts the heads from track to track.
During the loading of a flexible disk, the read/write heads
are held away from the surface of the flexible disk.
1.2.5
Stepping Motor
The stepping motor, under microprocessor
the carriage assembly with a tensioned
arrangement provides
each pulse the stepping motor receives,
shaft rotates 1.8 degrees.
carriage 1/2 track on the flexible disk.
1.2.6
Head Load Cam Assembly
The
head
load
heads onto the flexible disk with a force that is controlled
by a microprocessor.
flexible disk and reduces wear of the read/write heads.
(not shown)
Low-power,
inexpensive power
generates
The read/write heads are part of a precision
fast
and
This action,
cam
assembly
This action prevents damage to the
1-3
rotates the spindle
less
heat
than
control, positions
steel belt.
accurate
data
the stepping motor
in turn, moves the
(rotary solenoid)
supplies can
conventional
This
access.
For
lowers
the
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