typical GC2605, Operating Instructions & Parts Manual

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4.4.2 Winding adjustment
The wound bobbin thread should be neat and
tight. If it is not tight, adjust the thread tension by
turning tension stud thumb nut A of the bobbin winder
tension bracket. If the wound bobbin thread is not neat,
tension bracket C can be moved to be adjusted. When
adjusting, loosen screw B first, then move the bracket
left-ward or rightward. If the thread is wound to one
side as shown in Fig.15b, move the tension bracket
rightward, while if the thread is wound to one side as
shown in Fig 15c, move the tension bracket left ward
until the thread is wound neatly. As shown in Fig.15,
tighten screw B.
Remark : Nylon or polyester thread should be
wound with light tension, otherwise Bobbin D might
,
the borken or deformed. Don t overfill the bobbin,
because it will make its thread loosening down from
the bobbin. The optimum capacity of thread will fill
about80% of bobbin outside diameters, and this can
be adjusted by stop latch screw E.
4 .5Threading the needle thread and drawing the
bobbin thread.
When threading the needle thread, raise the
needle bar to its highest position, lead the thread from
the spool and pass it in the order instructed in Fig.16.
1) Lead the thread from the spool, pass down thru
the right side of thread guide plate 1, to left pass up
thru the middle hole of thread guide plate 1,to left pass
thru between two small tension dics and pass down the
left hold of thread guide plate 1.
2)To left pass down thru the right hole, to left up
thru the middle hole and to left down thru the left hole
of thread retainer 2.
4)To left and up pass thru the hook of thread
take-up spring 4, turn to left pass thru underneath
slack thread regulator 5, then up pass thru thread guide
6 and up to left pass thru the hole of thread take-up
lever 7.
5) Turn down to left pass thru thread guide 8,pass
down thru thread guard 9 of the needle bar bushing
(lower)(On the machine Model 2603 is the lower
thread guard) and needle bar thread guide 10,then pass
the thread from the left thru the eye of needle 11, after-
wards, draw out the thread from needle eye approx
100mm.
.
.
.
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.
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3)Pass down thru between two tension disc 3
.
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A
a b c d
B
C
D
E
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