11.Installing the needle (Fig.9)
12.Coordination among the needle、the thread and the material (Fig.10)
13.Threading the needle thread (Fig.11)
Turn the balance wheel to lift the needle bar to
its highest point, loosen needle set screw 1, making
the needle groove turn to the left side of an opera-
tor, fully insert the needle shank up to the bottom
of needle socket, then tighten needle set screw 1.
Note: Fig.12 (b) insufficient insertion
Fig.12 (c) Wrong direction of groove
The needle thread is left-twisted, the bobbin
thread is left or rigth-twisted. Holding the thread,
twist it with right hand in the direction of arrow
shown in Fig.10, if it is tight, it is left-twisted,
contrarily, it is right-twisted.
The Needle is DP X 17 or 135 5Nm 110 ~ 180
the needle number must be fitted for the materials.
Sewing too heavy the weight of materials. The needle
would be breaking and skipping stitch and thread
breaking for its too thin, if the needle is too thick,
it would damage the clothes for its large needle hole.
Therefore, the selection of needle and thread must be
fitted for the materials.
X
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 (Fig.11)
(1) Lead the thread from the spool, pass down through the right side of thread guide plate , to left pass
up thru the middle hole of thread guide plate , to left pass thru between two small tension disc and pass down
the left hole of thread guide plate .
①
①
①
-5-
9
Long groove leftward
a
b
c
Clearance
10
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