typical GC2605, Инструкция по эксплуатации и каталог запасных частей

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6.2 Adjusting the position of the feed dog (Fig.31)
The standard position of the feed dog is that the
clearance from the throat plate slit to the front end D of
the fully advanced feed dog is 1.5mm. When adjusting.
fix the feed dog in the position where the feed dog
fully advances. Then loosen feed rock shaft crank
clamping screw A slightly (see Fig.31) and move the
feed bar to adjust the clearness between the feed dog and
the thread plate. After that, tighten clamping screw A.
6.3 Adjusting the tension releasing mechanism(Fig.32)
The tension dics should be pushed apart to open
when the presser foot is lifted. But the open timing of
the tension discs can be adjusted When adjusting, first
remove the rubber plug at the rear side of the arm and
loosen screw A of the knee lifting lever(left), then the
tension releasing cam can be moved leftward or
rightward.When the cam is moved rightward, it is later
to open, otherwise it is earlier to open.
6.4 Adjusting the pressure of presser foot(Fig.33)
Pressure on presser foot is to be adjusted in
accordance with the materials to be sewn. Loosen lock
nut B, first,if heavy materials to be sewn, turn pressure
regulating thumb screw A clockwise as shown 34 to
increase the pressure. While light materials to be sewn,
turn the pressure regulating thumb screw A, a, counter-
clockwise to decrease the pressure on presser foot, then
tighten lock nut B.
6.5 Timing feed adjustment
The feed is well adjusted before machine leaving
off factory. Adjust if necessary as follows:
Lift presser foot, turn the dial to the max. Turn
balance wheel slowly to observe if the needle fall into
the symmetric center of feed dog hole. If not, loosen the
screw and turn the motion shaft to adjust it with
reference to Fig.37a.After adjustment tighten the screw.
Go on turning the balance wheel, make needle
advance a stitch length. At the moment, if the needle is
at the center of feed dog hole, see Fig.34B, then the
unison feed is got, if at D, then upper feed amount too
much, if at C, then too small. Both should be adjusted
When adjusting, loosen the nut (Fig.35)and change the
center gauge A. Increase A to increase upper feed
amount ,reduce A to reduce upper feed amount. After
adjustment, tighten the nut.
-11-
Left
Right
Screw driver
Rubber
Thread take-up
spring regulaing
Screw
Presser ber lifter
Tension releasing cam
Presser foot
A
Tension releasing rod
32
31
Feed dog
1.5mm
33 a
b
A
B
A