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4.3.2 Winding adjustment (Fig.15)
1) Wound bobbin thread should be neat and tight,
if not , adjust the thread tension by turning tension
stud thumb nut A of bobbin winder tension bracket.
( )
Note: nylon or polyester thread should be wound
with
light tension , otherwise
broken or deformed.
2) When the wound thread layer does not present a
cylindrical shape as in Fig.15a, loosen tension bracket
screw B and move tension bracket C leftward or
( )
rightward. If thread is wound as shown in Fig, 15b,
move the tension bracket rightward, while if thread
is wound as shown in Fig.15c,move the tension bracket
leftward, After
adequately positioning
bracket, tighten screw B .
3) Do not over fill the bobbin , the optimum capacity
of thread will fill about 80% of bobbin ouside diameter,
this can be adjusted by stop latch screw E .
4.3.3 Threading (Fig.16)
Every thread should be drawn through Thread Hole
( )
A , when use light and smooth thread (polyester or long
silk thread), it should be drawn through Hole B , Keep
the thread take-up lever in its highest position , draw
every thread in the following numerical order.
4.3.4 The stitch length and forward and reverse sewing
control (Fig.17)
The
stitch length
Length Dial A . Turn it counter-clockwise to expand
( )
its length and clockwise to shorten its length . The
numbers on Dial A show the sizes of the stitch length
( )
in mm.
For reverse feed, press down Release Feed Lever
( )
C to perform reverse sewing , Release the lever, the
reverse feed lever can reset automatically and the
forward sewing is resumed.
bobbin D might be
( )
( )
the tension
( )
( )
( )
can
be regulated by Stitch
R7
L7
L5
L8
R8
L9
R9
L10
R10
R6
L6
L11
R11
L12
R12
L13
R13
from right to left
A
B
A
A
-6-
A
B
C
L4
L3'
L3
L2'
L2
L
R2
R3
R4
R5
detail chart
thread
L11
from left to right
B
A
15
D
E
16
R1
R11
17
C
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