How To Thread The Upper Thread; Threading The Lower Thread - SunStar SPS/E-BH3100 User Manual

3) How to thread the upper thread

Place the thread take-up level on the highest position, and then hang up the upper thread as shown in Fig. 9.
In case of the thread guide of the needle bar, hang up the upper thread as shown in Fig. 9 according to the kinds of thread.
The proper length of the upper thread that puts forward from the thread hole of the needle is about 40mm from the needle.
[ Cotton and Span ]

4) Threading the lower thread

A. Insert the bobbin
If the bobbin is inserted by reversing the front
and the back, it will run idle. Therefore, be
sure to insert it by turning clockwise when
Cautions
seen from behind the bobbin case.
B. Pull out the lower thread from the groove
case, and then thread it through the thread hole
below the tension spring
thread through the thread hole
the same length through the thread hole
Whip Stitch (Plain Stitch)
Whip Stitch is a stitching type that the upper thread moves
vertically on the sewing material with the zigzag shape. This
type is the same thing with the zigzag type of the drop feed
zigzag machine.
Pure Stitch (Seal Stitch)
Pure Stitch is a stitching type that while the upper thread is going along straight with the center of the sewing line by
varying the upper thread tension, the lower thread twists up with it in lateral.
[ Polyester ]
into the bobbin case as shown in Fig.10.
. Take out about 40mm of the
for Whip Stitch, and take out
for Pure Stitch.
⑥ Pure Stitch
of the bobbin
②
passing
⑤
12
⑦ Whip Stitch
④
③
[ Fig. 8 ]
①
[ Fig. 9 ]