Free; The Motor Pulley; Threading Of The Rubber Drive Belt; The Speed Transfer Wheel - TANDBERG 12 Service Manual

4.3.6 Free
The motor power is shut off and
6 ) . 2 ) a r e n o t r u n n i n g .
t h e p u l l e y d i s c s ( 6 1 . i ,
F i g . 2 9 .
The supply turntable
The supply turntable (65.2) is complerely disengaged
from.the pu-lley disc (6.l.2) and fiee-running in rhis
position. Ref. chapter 4,3.3, fast wind.
F i g . 3 0 .
The take-up turntable
T h e t a k e - u p t u r n t a b l e ( 6 5 . 1 ) i s c o m p l e t e l y d i s e n g a g e d
f r o m t h e _ p y l l e y d i s c ( 6 1 . 1 ) a n d f i e e - r u n n i n g i n i h l s
p o s i t i o n . R e f . c h a p t e r 4 . 3 . 2 , f a s t r e w i n d .
'F
F i g . 3 1 . T h e o l i g n m e n t o f t h e m o t o r p u l l e y .
4.4 The motor pulley
Th-e driving mechanism with the speed transfer wheel
( 5 3 . 1 ) e n g a g e d i n t h e 1 7 / 6 i . p . s . t r a c k o n t h e m o t o r
p u l _
l e y ( 6 2 . 1 ) i s s h o w n i n f i g . 3 t . T h e m o r o r p u l l e y ( O ) . t )
has three tracks with different diameters ior the ipeej
lr.ultfgl wheel
(53..l), corresponding to the speeds
l ' / u , 3 ' / o , a n d Z r / , i . p . s .
Adiustments
T h e v e r t i c a l p o s i t i o n o f t h e m o t o r p u l l e y ( 6 2 . 1 ) i s a d _
j u s t e d , w i t h t h e o p e r a t i n g l e v e r
t S + . f l i n n e u t r a l p o s i _
t i o n . T h e d i v i d i n g r i b o f t h e m o t o r p u l l e y ( 6 2 . 1 ) s h o u l d
b e s e f 0 . 5 m m ( . O 2 " ) b e l o w a n i m a g i n a r y l i n e d r a w n
between the bottoms of the V-shapld grooves in the
p u l l e y d i s c s ( 6 1 . 1 , 6 1 . 2 ) .
1 8
4.4.1 Threading of the rubber drive belt
The rubber drive belt (62.2) is crossthreaded as snown
i n f i g . 6 . T h e b e l t i s r u n n i n g i n f h e u p p e r g r o o v e i n
f r o n t o f t h e . p u l l e y ( 6 2 . 1 ) , u n d i n t h e l o w e r g r o o v e a t
t h e r e a r o f t h e p u l l e y . T h e c r o s s i n g s h o u l d l i J b e t w e e n
l h e s u p p l y t u r n t a b l e ( 6 5 . 2 ) a n d t h e m o t o r p u l l e y ( 6 2 . 1 ) .
4.5 THE SPEED TRANSFER WHEET
The speed transfer wheel (53.1) is attached fo the
m o u r t i n g a r m ( 5 3 . 3 ) a n d i s d r i v e n b y t h e m o i o r p u l l e y
\ 9 2 ) . ) .
T h e s p e e d r r a n s f e r w h e e l ( 5 i . t ) i n t u r n , d r i v e s
the f ly-wheel (66. i ). The spring (53.5) secures the con-
tact of the speed transfer wheel (53.1) between the
m o t o r p u l l e y ( 6 2 . 1 ) a n d r h e f l y w h e e l ( 6 6 . 1 ) . R e f . f i q .
6 a n d 3 1 .
O , 5 m r i ( o . o z " .