36
A
A
B
B
a
a
b
b
16
6.4 Adjusting the pressure of presser foot (see Fig.36)
pressure on presser foot is to be adjusted in accord-
ance with material to be sewn.
Loosen lock nut B,b, first, then turn pressure regula-
ting thumb screwA,a,clockwise as shown in Fig.36 to
increase the pressure while turn the pressure regulating
thumb screw A ,a, counter-clockwise to decrease the
pressure on presser foot, then tighten lock nut B,b,
A
37a
Presser foot
lift front crank
6.5 Adjusting top feed mechanism
6.5.1 Adjusting top feed mechanism of machine Model
GC6-6
1) Adjusting feed amount
The top feed can be adjusted to synchronize with
bottom feed or differential with bottom feed.
Loosen the nut with a spanner, then change the center
distance A, as shown in Fig.37a. Increase distance A to
increase the top feed amount, decrease the center distance
to decrease the top feed amount, after adjusting, tighten
the nut. Trial sewing should taken after every adjustment.
The adjusting is repeated if necessary, until the required
feed style is achieved.
2) Adjusting the alternate lift amount of the presser feet
The lift amount of the walking presser foot is with
5.5 mm when sewing medium or heavy material, and the
presser foot lift amount is 3.5 mm.The lift amount of these
two presser feet can be changed slightly according to the
nature of material or the requirements in sewing. But he
sum tof these two presser feet lift amount is nearly the
same, as the other mechanisms are kept in constant
conditions. In other works, the increasing of walking
presser foot lift amount will diminishes the lift amount of
presser foot, and vice versa.
When adjusting, loosen clamping screw of presser foot
lift front crank slightly with a screwdriver and turn the crank
to overcome the friction on its shaft, as shown in Fig.37a.
The lift amount of walking presser foot can be increased
and the lift amount of presser foot is decreased if turn the
crank clockwise.The lift amount of walking presser foot is
decreased and the lift amount of presser foot is increased
when turn the crank counter-clockwise. After adjustment
tighten the clamping screw.
Nut
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