Adjust The Machine For Straight Stitching; Timing The Needle Swing - Husqvarna Viking Automatic 21 Service Manual

1
.
Adjusting the machine for straight stitching
staff ( 1 Fig
.
1 ) at 0
, and
turn
the
Set
the needle swing control
on
starting -
position control to the right
.
Adjust lever (
2 Fig
.
1 ) to
obtain
minimum play between the high point of
a cam
and the follower ( 3 Fig
.
1 )
. This setting should be made with the stitch selector at 5
.
Loosen
screw
( 5 Fig
.
1 )
with
a
screwdriver (
4 Fig
.
1 )
and tighten it after
making
the setting
.
Fig
. 1
.
2
.
Timing the needle swing
Set the needle
swing
control for
maximum
stitch width .
Turn
the
worm
gear
(
1
Fig
.
2 ) on the camshaft
,
pertaining to the zig
-
zag
drive , until
the
left
-
hand and right
-
hand
movements
of the needle
-
bar frame ( 3 Fig
.
3 )
terminate when the tip of the needle is
more
than V
32
in
.
( 7
mm
) above
the throat plate
on
the downward stroke
.
Loosen screws ( 2 Fig
.
2 ) and
tighten them again after making the setting
.
1