lt4.ADJUST PRESSER FOOT (Fig.l6,17)
1.
Lift adjustment
of
presser foot (Fig.l6)
The normal height
of
the presser foot (A) should
be
8mm,
yet
it
can
be adjusted,
if
necessary, according
to
actual requirement Loosen the pressure regulating
screw(C) and lift the presser
bar
lifter to raise the
presser foot, loosen the screw (D) and move presser
bar
upwards and downwards to change the lift
of
the
presser foot.
NOTE: The changeable lift
of
the presser foot (A)
will result in the alternate movement height
of
the
presser foot (A) and the walking foot (B), therefore,
adjustment must
be
made to
it
accordingly. See
procedure 3 stated below for proper way.
2.
Pressure adjustment
of
the presser foot (A)(Fig.l6)
Turn pressure regulating screw (C) clockwise
to
increase the pressure
of
the presser foot (A), and
counterclockwise to decrease it
if
you
desire.
3. Adjustment
of
the alternate vibrating height
of
the
presser foot (A) and the walking foot
(B)
(Fig.l6)
The presser foot (A) and the walking foot
(B)
vibrate alternately with equal height when machine is
in operation,
but
it can
be
adjusted according to actual
requirements. To increase vibrating height
of
the
walking foot
(B)
and decrease vibrating height
of
the
presser foot (A), adjust as follows: Down the presser
bar lifter and tum balance wheel until the presser foot
(A) is slightly separate from
the
needle plate, loosen
screw (E) and depress the presser foot (A) to reach
needle plate and then tighten the screw (E). To
decrease vibrating height
of
the walking foot
(B)
and
increase vibrating height
of
the presser foot (A): Turn
balance wheel until the walking foot
(B)
is slightly
separate from the needle plate, loosen screw (E) and
depress the walking foot
(B)
to
reach needle plate and
then tighten
the
screw (E).
4.
Movement height adjustment
of
presser foot and
walking foot
(Figl7)
The thickness
of
the material sewn should control
the height
of
the lift
of
the presser foot and walking
foot. The lift should be
just
enough for clearance
of
the material.
To
adjuSt, loosen the net
(H)
move the
crank rod upwards to increase the up and down
movement, and downwards to decrease it,
then
tighten
nut (H).
5.
Time walking foot (B) to needle
(Figl6)
This is
the
normal timing when tum the balance
wheel toward you, after lowering the presser
bar
lifter,
the walking foot (B) should
reach
the feeder earlier
than the needle eye comes to,
and
when the needle
raises, the walking foot (B) should leave the feeder
after the needle
eye
has left the feeder. This is due
the
reason that the walking foot (B) must tightly hold the
goods while the needle is passing the goods for
avoiding irregular stitches. To adjust this, loosen
the
two screws (G)
and
adjust the rotating position
of
the
cam
(F) faster
or
slower as may be desired, and
tighten the screws (G).
