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This
chapter
FD1165.
3.1
BASIC OPERATIONAL DESCRIPTION
When a flexible disk is inserted into the Model FD1165 and
the door
handle
center
hole of
clamping it in operating position on the spindle.
same time,
this action switches the drive motor on.
drive motor moves the spindle that,
flexible disk.
ing conditions.
•
The flexible disk is inserted properly and the door
slot is closed.
•
A single- or dual-sided flexible disk is loaded.
•
The flexible disk has a write protect notch.
•
The read/write head is located on the track 00 of the
flexible disk.
An index sensor provides a time reference by generating a
pulse for each rotation of the flexible disk.
flexible disk reaches 70% of its prescribed
Index pulse is detected four
to the controller.
the door is closed.
After the disk drive receives a Step signal and a Direction
Select signal (see Sections 3.3.3 and 3.3.4), it energizes
the
stepping
proper track.
by the Side Select signal.
Head Load signal,
disk by the head load cam.
disk drive reads from or writes to the disk when it receives
a Read Data or Write Data signal from the controller.
CHAPTER 3
INTERFACE INFORMATION
gives
interface
is closed,
the flexible disk centering
Sensors in the disk drive detect the follow
The FD1165 is "ready" about 700 ms after
motor
to move
One of the two read/write heads is selected
the heads
information
the collet presses
in turn,
times, a Ready signal
the
read/write
When the disk drive receives a
are loaded onto the flexible
Once the head is loaded,
3-1
for
the
Model
into
the
the disk and
At the
The
rotates the
After
the
speed and the
is sent
heads
to the
the
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