Setting The Bobbin; Drawing Thread From The Bobbin; Machine Adjustment; Thread Tension Adjustment - Reliable MSK-8420B Instruction Manual

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. Machine Adjustment

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
pressure; or turn the
screwdriver to increase the bobbin thread ten-
sion.( see Fig.20,22 )
1
thread
inner stop piece
to release the needle
adjusting screw with
sliding plate
hook
thread
2
1
thread
a
tension adjusting screw
-7-
thread
sliding plate
A
Normal
B
C
18
hook
19
20
21
loosen
tighten