typical GC6-6, Инструкция

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1 7
37b
A
B
C
B
Forward
Needle
Stitch
length
38
3) Adjusting the lift amount of presser foot together
with walking presser foot
The lift amount of walking presser foot together with
presser foot also can be adjusted slightly. When adjusting,
loosen nut with a spanner first, then move the presser foot lift
regulating screw to change its center distance B between the
presser foot lift shaft, as shown in Fig.39 The lift amount is
increased as to shorten the center distance B, and the lift
amount is decreased when widen the center distance B,
After adjustment, tighten the nut again.
4) Adjusting the clearance betwesser foot and walking
presser foot
In sewing operation, for prevent the walking presser foot
from striking on presser foot at the end of feeding, a proper
clearance C of approx. 1.5mm should be maintained between
them, as shown in Fig.40b. When the clearance is too small
or too big necessary to adjust, loosen rear crank clamping
screw with a screw driver and turn the rock shaft, sa shown in
FIG.40A. Turn rock shaft clckwise to decrease the clearance C,
and turn the rock shaft counter clockwise to increase the
clearance C. After adjustment, tighten clamping screw.
After the adjustment of 2).3) or 4) as mentioned above, an
inspection should be made, as to raise the presser feet with
presser bar lift, and turn balance wheel slowly to see that the
walking presser foot is to strike with other parts, if it is, should
be adjusted again.
6.5.2 Adjusting the feed mechanism of machine Model GC6-7
1) adjusting the feed amount
Top feed must be synchronized with needle feed and
bottom feed, this is performed in factory before delivery. If
necessary it can be adjusted as follows:
Lift the presser foot with presser bar lifter, set the max
stitch length, then turn balance wheel slowly and watch for
needle penetration to see if the needle is positioned in the
center of feed dog needle hole, at the point B as show in
Fig.38, if not, should be adjusted first as shown in Fig.40a.
After adjustment, tighten the clamping screw.
Turn the balance wheel continuously until the needle
feed end is reached, at that time, the feed amount is correct
when the needle is still positioned in the center of feed dog
needle hole, at the point B1 as shown in Fig.38. If the
needle is positioned at point A in Fig.38, the feed amount is
too big, and too small of feed amount while the needle is
positioned at point C in Fig.38, all of these should be
adjusted accordingly. In adjusting, loosen nut with a spanner,
then to change the center distance A, after adjustment
tighten the nut.
Above
Under
Nut
Presser foot
lift front crank