The Lifting Mechanism - TANDBERG 12 Service Manual

Adiustments
The speed selector bracket (29.3)
is adiusted until the
mounting arm for the speed transfer
rarheel (53.3) is
p a r a l l e l t o t h e l o w e r m o u n t i n g
p l a t e ( i t . J ) ( u n s c r e w
the two screws Ml l3). fnu"riru.ing
between the
m o u n t i n g a r m ( 5 3 . 3 ) a n d t h e
l o * " r .
" . o u n t i n g
p l a t e
g 1 . l ) s h o u l d b e a p p r o x . . I m m ( . O 4 , , ) . n " t .
f i g . S a .
The vertica.l position
"t
tne .p""j tru*f"l,rn"el
(53..|)
i s _ a d i u s t e d b y a d d i n g o r s u b t r a c t i n g - i r r u . -
w a s h e r s
between rhe rransfer wheel holdei
(SC.Z) and the
m o u n t i n g a r m f o r t h e t r a n s f e r
w n e e t ( S S . S l . T h e s p a c -
i n g . b e t w e e n t h e s p e e d . r r a n s f e r
* n " " f i j g . r f
a n d r h e
higher speed track o.n rhe .otor.
frtt-uy'iur..,) should
b e a p p r o x . 0 . 5 m m ( . O 2 , ' 1 i n , n "
i ; / . - i . p . s . a n d 3 3 l a
i . P . s . p o s i t i o n .
The vertical position of the speed
transfer wheel (53..1 )
s h o u l d b e m i n i m u m f r n n n
t . O a ) i l " i " * i n " u p p e r r i m
of th.e flywheel (66.1) in ti" Z,'lr-i
ps. position. The
flywheet (66.1) is titiea, ii ne.J.r.ii,
Ui addins an
e x t r a t h r u s t w a s h e r ( 6 6 . g 1 ) i n
t h e ' O * L I . f l y w h e e l
b e a r i n g . R e f . c h a p t e r 4 . 7 .
The horizontal alignment of the
speed transfer wheel
( 5 3 . 1 ) i s - a d i u s r e d L y b e n d i n s
t h ; - ; ; ; r ; " ;
w h e e t h o t -
9er
(5S.2) (tool No. 6) until rihe
,puJ'rr""nrter wheel
( 5 3 . 1 ) r u n s p a r a i l e l t o r h e f t y w h " J j - ( - o Z . ; ; '
4.6 THE I.IFTING MECHANISM
\
T . h e
- d e s i g n o f t h e l i f t i n g m e c h a n i s m i s s h o w n i n
f i g . 3 4 .
T h e . l i f t i n g a r m ( 5 9 . 1 8 )
y l t ! t h e p a r a i l e l a r m ( 5 3 . 7 )
and the adiustmenf arm (53.g) is
rocateJ between the
u p p e r a n d t h e l o w e r m o u n t i n g p l a t e s ( Z l
. 2 , 7 1 . 1 ) - T h e
jfj']n'''.iT,ll?;t8) is linked t". *," ..i""iri. ,esrn"nt
\ J y . t / ) w n t t e t h e p a r a l l e l a r m ( 5 3 . 2 ) i s c o n n e c t e d
b e _
tween the lifting arm (59. lg)
and the-tia-nsfer wheel
h o l d e r ( S 3 . 2 ) .
The lifting mechanism releases
the speed transfer
w h e e l ( 5 3 . 1 ) f r o m c o n r a c r w i r h t n u r n o r o l p , l l e y
( 6 2 . 1 )
a n f t h g f l y w h e e l ( 6 6 . 1 ) i n u l f p o r i r - i o n s T t
, h " o p u _
r a t i n g l e v e r ( 5 4 . 1 ) e x c e p t n o r m a l
f o r w a r d d r i v e .
Adiustments:
R e f . f i s . 3 4 .
Loosen screw A. The lifting between
the speed trans_
fer. wheet (53.i) and rhu ;;;,.
;rii"vi#.U
is indi_
ylauatly adjusred for the,thruu'rpu"i.'-6y U"naing
the splirs X, y and Z on rhe liftini
arm 6,0.]A), .or-
responding to rhe speeds 7,
1", i"lo unJ t1u-'i.p.r.
The lifring is occasioned Uy u'iufJi*ly"'Jmall
move-
t"nl
?f. the operating lever (54..1) from normal for_
ward drive to neufral. The lifting ,nortJ
[" .ompleted
before the motor current is siut
.if-JV the micro_
switch (33.3).
The clearance between the motor pulley
(62.1) and
the speed rransfer wheel (53.f
1 ar afl speJds should
be minimum 3 mm when rh" ;p;r;;ffiJver
t5a.t)
is in neutral position.
Set the speed selector to l t/u i.p.s. tape
speed and
the operaring lever to neutrli piriii."Ii*n
rhe ad-
justmeni arm (53.8) unril a .p..inl
ol O,i'^^ 1.92,1
is obtained between the speed trJnsfer
wheet (S3.1)
and the flywheel (66.1). irr" rn"
,plej'."tu.tor. to
33/a
.and. i'1, i.p.t'. tape speed and check that the
spacing_ is min. 0,5 mm 1.0),,1 for Ool.,
pt.itlons. Re_
adiust if necessary and re_seal tf.'r" uJirrt,i"it
r.rurar n.
F i 9 . 3 2 . T h e
f l y w h e e l w i t h
t h e b e o r i n g s ,
exploded view.
rt
I G