typical GC0303DCX - Adjusting the Feed Dog Angle; Adjusting the Difference of Stitch Length between the Forward and Backtacking; Adjusting the Tension Release

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20
21
22
2
1
7
5
Mark
Standard
(Fig. A)
Lower the front
(Fig. B)
Raise the front
2
1
Left RightLeft Right
22. Adjusting the feed dog angle (Fig. 20)
The standard angle of the feed dog is: when the
feed dog is at its highest position above the
needle plate, the Mark on the feed bracket shaft
is on the horizontal position.
1.Turn the machine pulley to lift the feed dog to
its highest position;
2.Loosen the screw ⑦;
3.Turn the feed bracket shaft in the direction of
the arrow within a range of 90 with respect to
the standard angle position.
＊In order to prevent puckering, lower the front
of the feed dog (Fig. A)
＊In order to keep the materials straight, raise
the front of the feed dog (Fig. B)
4.Securely tighten the set screw ⑦.
It's necessary to adjust the feed dog height
again after this adjustment.
23. Adjusting the difference of stitch length
between the forward and backtacking (Fig. 21)
1.Remove the back cover;
2.Loosen the screw ① and turn the connecting
stud ②
＊Turn the stud ② clockwise, the forward stitch
length will be longer and the backtacking stitch
length will be shorter;
＊Turn the stud ② counterclockwise, the
forward stitch length will be shorter and the
backtacking stitch length will be longer;
3.Tighten the screw ①.
24. Adjusting the tension release (Fig. 22)
The opening time of the thread tension discs
can be adjusted.
Remove the rubber cap on the rear of arm, and
turn the screw ①, then the thread release cam
② can be moved left or right.
Move the cam rightward, the release time will
be slow
Move the cam leftward, the release time will be
quick.