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SET
SCREWS
~
TRIPPING
PO INT
EXTENSION
Fig.
41.
Adjuoting tht> Tripping Points
REEL
DRIVER TRIPPING POINTS
CHECK,
Tr ipping
po
int
on
outside
edge of
feed
com, Fig.
41, should be set
to
engoge the
reel
winding linkage
when
the
hook
point hos rotated
approximately
1/
4
revolut
ion pa
st loop
toki
11~
(J
lu
4
o'clock).
Tr
ipping
point
exten
~ion
a
l
so shown in Fig.
41
contro
l
s
the duration of
time in
which
the
rf:el
is
wound
and
consequently
the amount
of
thread that
i
s
wound
on the reel.
The
cd justment of the t ripping
point extension
vari
es with
the typt>
of operation performed but may
be
generally
set to
rel6ose the
winding
mechanism
when the hook hos rotated slightly less
than
one full
revolution from
loop
taking
(11
to 12 o'clock)
.
SETTING 1:
(Tripping
Point)
Loosen set
screw shown in
Fig. 41 and
position
tripping
point to
engage the
wi
nding mechanism when
the hook po int
has
rotated
approximately
1/
4
revolution
past loop
taking.
Secure ly tighten set screw.
SETTING2:
(Tripping
Point
Extension)
L
o
osen two s
e
t
screws
in tripping
poin
t
ext
ens
ion
and 1nove
extension t
o
obtain the
desired
amount
of
wind.
Securely
tighten two
set
screws
and
ad
just
pre-tension.
24
NOTE: For cams having two
set
s of tripping points,
repeat proceedure for other
set.
PRE-TENSION
CHECK:
Prc.tcnsion
device shown
in
Fig
.
42
ai
ds
in
controlling
the
amount
of
thread
th
a
t
i
s
wound
onto the
reel.
SETTING,
Turn
thumb
nu
t
os
required
produce
o
slight
drag
on needle
threod
.
T
H
UMB
NUT
F ig.
42. Adjusting
t
ho P re ..
Tens
ion
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