21
20
19
18
Normal
A
B
C
-7-
hook
thread
sliding plate
hook
sliding plate
tension adjusting screw
loosen
tighten
inner stop piece
1
1
2
thread
4.3.5 Placing bobbin (Fig.18)
Note: when bobbin is placed into the bobbin case,
the thread should be wound properly in the correct
direction shown in the figure.
4.3.6 Drawing thread from the bobbin (Fig.19)
a. Draw the thread end to Bobbin Slot (1) shown in
the figure, and pull it out down through the inner
bobbin stop piece.
b. Hold the thread with left hand , turn the balance
wheel slowly and get the bobbin thread, then draw
them a little apart from the presser foot.
5.1 Thread tension adjustment
All forms of stitches are shown in Fig.20.
The normal stitch of sewing machine is shown as
Fig.(A) If stitch is abnormal , the puckering and thread
breakage will occur, and the needle thread tension and
bobbin thread tension should be adjusted so that the
normal stitch can be obtained.
a. If the stitch seam shows as Fig. 20B, indicates
that the needle thread or bobbin thread tension
is too loose , then turn the thread tension screw
counter-clockwise to release the needle thread
pressure; or turn the adjusting screw with a
screwdriver to increase the bobbin thread ten-
sion.( see Fig.20,22 )
5. Machine Adjustment
thread
Содержание MSK-8400B
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