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5
Materials Heavy Medium Light
Thread(Ref.)
Polyester
Cotton
Vinylon #30 or more
Polyester #50 to #60
Polyester
#50 to #60
Cotton
Vinylon #50 to #80
Refer to the table above, and adjust according to the stitching conditions, the material and thread
5) Adjusting of pressure of presser foot
Pressure of the presser foot can be adjusted by
turning the pressure regulating thumb screw
6) Adjusting of thread tension
7)Adjusting of upper thread tension
(1) Upper thread tension can be adjusted by thread
tension nut.
(2)Upper thread is to be adjusted according to the lower
thread tension.
(3)For special fabric sewing with special thread, the de-
sired tension can be obtained by adjusting the strength
and operating range of thread take-up spring.
8)
Adjusting of lower thread tension
(1) Lower thread tension can be adjusted by screw (A).
(2)
In the case of cotton thread #60, the thread ten-
sion can be checked as the following. Hold the
end of pulled out thread and if the bobbin case
fall slowly, the tension is proper.
Summary of Contents for GC1998-MCDZ
Page 13: ...A ARM BED AND ITS ACCESSORIES 11...
Page 16: ...B NEEDLE BAR AND THREAD TAKE UP MECHANISM 14 14...
Page 18: ...C FEEDING AND FEED LIFTING MECHANISM 16 16...
Page 21: ...D STITCH REGULATOR MECHANISM 19 19...
Page 24: ...E KNIFE MECHANISM 22...
Page 26: ...F PRESSER FOOT MECHANISM 24 24...
Page 29: ...G THREAD TRIMMER MECHANISM 27 27...
Page 32: ...H TOUCH BACK AND DETECTOR MECHANISM 30 30...
Page 34: ...I MOTOR MECHANISM 32 32...
Page 36: ...J OIL LUBRICATION MECHANISM 34 34...
Page 38: ...K ACCESSORIES 36 36...
