I15.ADJUST FEED
DOG
(Fig.18,19,20,21,22)
!.Adjustment
of
the position
of
feed dog (Fig.l8,19)
Generally, the position
of
the feed dog should be:
When minimizing the stitch length, the center
of
the
needle hole
on
the Feed Dog (A) should align the
center
of
the Needle Plate (B).
If
necessary, adjust as
follow:(Fig.l8)
l ) Minimize stitch length
2) Loosen the Screw (D)
of
the Feed
Rock
Shaft Crank (Right) and move the
two
Screw
(E)of
Crank.(Fig.l9)
3 ) Turn Feed Rock Shaft(C) and align the
center
of
the Needle Hole
on
the feed dog and the
center
of
the Needle Plate (B).
4) After the adjustment, be sure to tighten the
sc
r
ew
(D),(E).
5) The standard height
of
feed dog (A) is that the
top
of
feed dog is 1.2mm above needle plate
surface.(Fig.20)
2.
Relative position adjustment between needle and
the needle hole inthe feed dog. (Fig.21)
Make sure that needle
can
be
descended to the
center
of
the needle hole,
if
not, adjust
it
as follows:
1) Remove the arm side cover and loosen the
screw (A).
2) Holding the needle bar and move it to
the
center
of
the needle hole
in
the feed dog, the tighten
screw (A) and replace the arm side cover
3. Timefeed motion to needle motion (Fig.22)
The standard timing
of
feed motion to needle
motion is that the feed dog starts moving forward
when the needlepoint reaches the needle plate surface.
If
feed motion is not timed to needle motion, adjust
as follows:
1) Remove the arm side cover
and
loosen the screw
(A), (D)
of
the feed and feed lifting eccentric.
2) Holding feed and feed lifting eccentric (B) and
turn balance wheel slowly until the reference hole(C)
on the feed and feed lifting eccentric aligns with mark
(F).
When adjusting, the clearance between feed and
feed lifting eccentric (B) and feed link lever (E)
should be 0.3-0.Smm.
After the adjustment, be sure to tighten the screw
(A), (D).
7
From the library of: Superior Sewing Machine & Supply LLC
