19
20
3) Control of the lower thread tension
Turn clockwise the screw for the bobbin case’s
tension adjustment as shown in the picture to intensify
the tension of the lower thread while turning counter
clockwise the screw to weaken the tension.
<Picture 5-12>
5.3.5) How to wind the lower thread
1) Insert the bobbin in the thread winding driving shaft of the thread winding base attached in the upper cover.
2) Make the thread winding lever close to the bobbin. Then operate the machine.
3) After the thread winding lever is separated from the bobbin, cut the thread of the bobbin using the mes for
thread winding.
5.3.6) Control of the thread winding device
1) As for the control of the thread winding amount
of the bobbin, use the initial position of the
thread winding control panel. If the amounts
of thread winding are high, loosen the screw
of the thread winding control panel to turn the
position toward A; if the amounts are low, turn
the position toward B.
<Picture 5-14>
<Picture 5-13>
Screw for
the tension
adjusting
thread wind
driving shaft
bobbin
Bobbin
mes
thread winding lever
thread winding base
thread winding control panel
Summary of Contents for SPS/F-1811 Series
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