The three sections
of the
mqin lever
ore: the
mqin
BODY
which
secures
ihe shuttlecock
ribbon,
Fig. 22;
the RELEASE
CAM
which engoges
the releose
plunger
ond
the
pin
on the first geor
segment,
Fig.23; ond
the SYNC
CAM which
closes
the internol
sync
contocts,
Fig. 23.
To odiust
the releose
com,
you
must
loosen
both of the screws
shown
in figure
23.
But to odiust
fhe
sync com,
iust
loosen f he
one screw
indicoted
by
the
doshed orrow.
$
I
First, let's
check the
odiustment
of the
releose
com.
Cock
I
the shutter
ond set
the releose
plunger
to
"bulb.
"
Now,
releose
r""J
the shufter ond
hold
the releose
button depressed
--
the shutter
blodes
should
remoin fully
open.
But if
the
releose com
is out of
odiustmenl, the shutter
blodes either will foil to remoin
open on
"bulb,
"
or will open
only port
woy.
Soy,
for
exqmple, thot
the shutter
blodes remqin
poriiolly
open on
"bulb"
--
this
meons thot the
moin lever is
blocked by
the releose plunger
before
rototing
forenough
toollow full
blode
open
ing
.
The
correction
is to continue
holding the shutter
open on
"bulb"
ond loosen
the two
screws,
Fig.
23
--
loosening
the
screws
ollows
the
body
of the
mqin lever to turn seporotely
from the
releose com.
Now,
while the releose
cqm remoins held
by the
releose
plunger,
ollow
the
body
of ihe
moin lever to roiote slowly
(clockwise)
until the
blodes ore fully open
--then,
retighten the
screws.
As the
body
of ihe
moin lever turns clockwise,
the shuttle-
cock ribbon
moves
forther
to
the right
--ond
thoi ollows
the'
shuttlecock
to open the
blodes the odditionol omount.
The
other
symptom
of molodiustment
is thot
the blodes open
ond close
before
fhe releose
com
isqrrested
by the releose plunger.
Consequenf
ly, ihe shutfer
delivers on
instonfoneous speed when
sef fo
"bulb.
"
The correction
is
to
loosen the two screws
ond turn
the
body of the
moin lever counterclockwise
in relotion to the
releose
com.
Once you've
odiusted
the releose
com of
"bulbr
"
you
con
check the
timing of
the
sync
com. Since
only one of
the two
screws
in figure 23 holds
the sync
com, od[usting
the
flosh sync
doesn't
disturb the releose
com
odiustment.
Compored
to
some
of the other shutters
you've studied. the
operotion
of theArgus C-3 flosh sync
is
quite
simple.
Locote the
lug on the sync
com in figure 23
--
os.the
moin lever revolves
in
the
releose
(clockwise)
direction,
this lug strikes the
movoble
sync conioct.
The
sync
com lug then pushes
the'movoble sync
contoct
ogoinst
the
fixed
sync
contoct to fire the flosh.
18
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