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Hitachi MP-1802 Technical Manual page 34

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dr
( 3 )
E * p l a n a t i o n
o f t h e M e c h a n i s m s
1 .
D r i v e
m e c h a n i s m
T h e s p i n d l e
r o t a t e s
a t 3 0 0 r p m ( 2 0 0 m s f r o t a t i o n )
w i t h
a D C d r i v e
m o t o r a n d d r i v e
b e l t .
T h e m o t o r s t a r t s
a n d
s t o p s w i t h
t h e M f f i
s i g n a l .
2 .
S p i n d l e
F r o n t
D o o r M e c h a n i s m
B y p r e s s i n g t h e f r o n t d o o r , t h e c e n t e r i n g
c o n e , s u p p o r t e d
b y t h e c o n e t h r u s t
a r m , e n t e r s
t h e c e n t r e h o l e
o f t h e
d i s k .
B e f o r e t h e c o n e i s
l o w e r e d ,
t h e e o n e i s
e n l a r g e d
s o t h a t
i t
t a k e s h o l d
o f t h e i n n e r
d i a m e t e r
o f t h e d i s k
t h u s c l a m p i n g a t t h e c o r r e c t
p o s i t i o n ,
drf.ve
spindle
F i g . 7 . 1 2
D r i v e M e c h a n i - s m
c'enterinq
corn
s)lpander-
f,ront. cloor
Iopenl
spindle
rrut8=SaI'
door latch
F i g . 7 . 1 3
S p i n d l e
F r o n t
D o o r M e c h a n i - s m
3 .
F i n e C l a m p M e c h a n i s m
T h e , f i n e
c l m a p m e c h a n i s m w o r k s w i t h
t h e f r o n t
d o o r .
. . . / 3 2
A s

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