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Function
Key_lng
Display
2. Turn the rotary knob clockwise
until the head arrives at the
outmost position. Thereafter, turn
the rotary knob counterclockwise
/"
~
while stopping and starting at
/
\.
each clicking point until the
/
\
Cat's eye pattern signal sppears.
/
\
~
~
/
\.
Turning the stepping motor with
(bl-I
the geared driver within the range
that the screw fastening the
stepping motor is not dropped from
the stepping motor flange, set the
"\
£').
amplitude ratio of the peak
\.
/
signals on the Cat' s eye pattern
"'-
./
\
signal at 1:1.2 or less.
\
/
Rote: A ratio of 1: 1.2 is defined by
"'-
/
identifyin!r, the smaller one as
(bl-2
~nity.
Hote: If adjustment of the stepping
motor cannot be conducted by
using the geared driver ,first
/:
~
find the appropriate position
/
\
in accordance with the follow-
/
'\
/ '
' " "
/
ing procedure, and perform ad-
/
\.
justment again.
(cl-I
(1)
When the waveform is as shown in
Fig. 5-4 (b)-l and (b)-2, turn
the geared driver clockwise.
(2) When the waveform is as shown in
1/\
/'
Fig. 5-4 (c)-l and (c)-2, turn
\
/
the geared driver counter-
1\
/
"'-
/
\
/
clockwise.
\.
/
J. Set the
AID converter gain by ad-
(e
1-2
justment so that the peak values
of the Cat's eye pattern signal
may range from
J to 4 divisions.
(Refer to Fig. 5-4 (d»
41
Rote:
If
the amplitude ratio is set
at any value other than utmost
Jt
/
"\.
/
'\
/
\
/
-""-
1:1.2 during initializing,
/
\
/
\
control does not advance the
Cdl
step to the next even if the
Fig.
5·4
I
RETURN I key is pressed.
IRETURNI
-13-
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