Sharp FDD-412A - Page 77

FDD412A/B
Steel belt Step motor pulley
v4 / Head carriage
Step motor set screw
Step motor
—— SS;
Fig. 4.22 Step Motor
Step motor pulle
M2 set screw ? y y
‘
a
a 4 Cdk belt
Clamp
(pulley)
ea
app
steele
ee a
| > 20.3 kg
M2.5 set screw
c=
a
1
‘
M2.5 set screw
7
eaf--- --an\~
\
\
Clamp (belt)—~
Fig. 4.23 How to Install Steel Belt
4.3
Adjustment
Procedures
4.3.1
Head
Position
(Tracking)
Adjustment
(1)
Objective
and
setting
requirements
The
magnetic
heads
are
made
to
align
correctly
with
the
medium
in
track
position.
The
setting
requirements
involve
the
distance
between
track
#38
(middle
between
0
and
78)
and
the
spindle
center
(given
below).
There
requirements
are
to
be
met
by
following
the
ALL
uSEUENE
procedure
of
(3)
below.
: z +0.06 mm
Side
O
head
r=71.645
-0.04
mm
:
_
+0.06
mm
Side 1 head r= 69.529 NGO le aan