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r
/
r
/
1/
1\
r \
'\,
Fig. 9.2
-
1'-.
/
I'
1\
/
-
A
\
B
\
/
i\
J
V
\
-
V
'\
L-
V
-
Radial Alignment Waveforms (CATS EYE)
A
>
B
B>A
_l
-A
_
A
-S
)(
100
II
lOa
Nota:
Sides
0
and
1
a,..
adjusted to
agree
at the 'actofY
.
If they disagree,
adju"
them to meet the
specifintions of Table
8.1
• DAD
(Dynamic
Alignment Diskette) 3.5-inch
(4)
Watch
the
output
wave
form
s
for
sides
0 and
1.
They should
appear as shown in
Fig.
9.3.
(S) Measure
the timing
levels
Al
to
A4 and 81 to 84
in
Fig. 9.3,
and calculate the lobe ratio from the following
formulas.
EB
}:A x100%
EA
~
A
<
EB:
EB
x
100%
(6)
The lobe
ratio ulwlated
by
the above
formulas
should
meet the
specifications on
item
3
of Table
8.1.
(7)
If
the above
requ irement
is
not met, loosen the two
mounting
screws
for
the
stepper
motor,
adjust.
(8) Seek from track
0 to
track
40
and
f
rom track
79
to
trac
k
40, and confirm that the adjustment has been completed.
(9)
After
the rad
ial
adjustment,
be
sure
to
confirm
track 00
sensor
adjustment 9.8 and head
(arriage
li~iter
9.9.
Note:
An
alignment instrument
for
3.5-inch
FOOl permits
accurate and easy adjustment because the
lobe ratio is
displayed on
the
instrument.
[J,-------------------------u--
Fig. 9.3
Alignment Waveform (DAD)
- 9
-
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