Singer Centurion 121D - NEEDLE BAR FRAME DRIVING LINKAGE ADJUSTMENTS

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
NEEDLE
BAR FRAME
DRIVING
LINKAGE
ADJUSTMENTS
1.
Loosen
pinch
screws
A,
B
and
C
2.
Set
connecting
rod
slide
block
to
3/32
inch
dimension,
Fig.
1,
and
tighten
pinch
screw
"A".
3.
Set
stitch
length
to zero
stitches
per
inch
in
forward
feed
direction
as
shown
on page
5.
4.
Position
connecting
rod
slide
block
stud
perpendicular,
(90°), to
machined
surface
of
arm
casting,
Fig.
1,
and
tighten
pinch
screw
"C".
Connecting
Rod
3/32"_.\
\-
Slide
Block
~
-
<)
i
Connecting
Rod
Clamp
(Upper)
Pinch
Screw
7
Slide
Block
Adjusting
Screw
Connecting
Rod
Slide
Block
Stud
Pinch
Screw
(B)
~
Connecting
Rod
Connecting
Rod
Clamp
(Lower)
\~
'----------------\
Pinch
Screw
(C)
FIG. 1
40