Global WF 955 - Page 12

20.
TIMING
OF
THE
VIBRATING
PRESSER
FOOT
This
is
the
normal
ttmm
g
when
turn
th
e balance
wheel
loward
yo
u, after lowering
the
presser
bar
lifter,
the
,·ibrating
pre
sser
foot
should
reach
the
fee
d
dog
earlier
than
the
needle
eye comes
10
,
and
when
the
needle
raises,
the
vibrat111g
presser
foot
should leave
the
feed
dog
after
the
needle eye
has
left the feeder. Th
is
is
due
the
reason
that
the
vib
ratin~ presser foot must
tight!
hold
the
g
oods
while
the
needle
is
passing
the
g
oods
for
avoiding
irregular
sti
tch
es
.
To
adjust this, set
the
lifi
of
the
alternating presser
feet
to
equal.
loo
sen
th
e
two
screws
4
(F
ig.
20)
and
ad.1ust
the
rotating
position
of
the
cam
5
(Fig.20) faster or
slower
as
ma
y
be
desired,
and
tighten
the
screws
.
21.
ADJUSTMENT
OF
THE
CLEARANCE
BETWEEN
FEED
FORKED
CONNECTION
AND
FEED
FORK
COLLAR
(Fig.IS,
Fig.16)
In
correct clearance between
the
fork
8
of
feed
forked
connection
and
feed
fork
collar 9
will
bring irregular
st
·
ifch
l
engt
h
or
overheating, e
tc
.
To
adiusl
this
open
th
e
cove
r
i,.ate.
Remov
e
th
e cover
plate
a
nd
th
e
oil
reservoir.
To
inc'.easc
th
e
clea'.ance,
loosen
the
screw
and
turn
the
screw
to
!cit
or
counter-clockwise. This adjustment
s
hould
be
done
with
turning
ihe
balance
\.
V
heel
toward
ou
to
ge
t correct cleanmce.
Upon
completion
of
a
djustment
,
tighten
the
screw
which
is
loosened
to
touch
the
feed
fork
.
22.ADJUSTING
THE
THREAD
CONTROLLER
SPRING
(Fig.21)
No
rmall
y.
the
thread controller s
prin
g
I
should
hold
slack
of
the
upper
thr
ead
t1111tl
the
n
eed
le reaches
to
th
e
go
ods.
and
it
should
paus
e
while
raising
of
the
needl
e
and
passing
of
the
upper
thr
ea
d
through
th
e
bobbin
case
.
I)
For
more
controller action
on
the thread:
Loosen
the
stop screw
2.
move
the
s
lop
lo
the
right
(For
less
action
,
move
to
the
left).
Tighten
the
screw.
2)
To
ad1ust
th
e tension spring: Loosen
the
serrated
nut
4
and
the
screw
5.
Turn
the
tension
st11d
6 slight(\'
to
the
left
to
s
tr
e
ngth
en
the
tension
(to
lighten
the
tension
.
turn
10
the
right)
with
a
scre\\dri,·er.
Ti
g
ht
en
th
e screw
and
nut
upon
comp
l
ct
1on
of
adJ11s1111cm
.
-9-
3
2
Fi
.2
1
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com