typical GC6-6, Инструкция

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1) In case of needle thread tension is too strong or
bobbin thread tension is too weak, as shown in
Fig.25(b), turn the tension regulating thumb nut counter-
clockwise to decrease the needle thread tension or tighten
the bobbin case tension regulating screw to increase the
bobbin thread tension(see Fig. 26).
2) In case of needle thread tension is too weak or
bobbin thread is too strong as shown in Fig.25(c), turn
the tension regulating thumb nut clockwise to increase
the needle thread tension or turn the bobbin case tension
regulating screw counter-clockwise to decrease the bobbin
thread tension (see Fig. 27).
3) In case of stitches as shown in Fig. 25(d), (e),
adjustment can be made with reference to above means.
6. Adjustment
6.1 Timing between needle and rotating hook motion
6.1.1 Adjusting the needle bar position(Fig. 28)
1) Turn the balance wheel to locate needle bar at
its lowest position.
2) Remove face plate (or rubber plug).
3) Loosen needle bar connecting stud clamping
screw A.
4) Move needle bar vertically to bring the center of
needle eye D coincidence with inside surface E of
bobbin case holder.
5) Then tighten clamping screw A.
28
D
E
A