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Adjusting the Tension of Stitch Thread(Fig. 29, Fig. 30)
1.Adjusting the tension of bobbin thread
Hold the end of a thread which hanging fro
-m the bobbin case and use the adjusting rota
-ting scerw
to regulate. The tension of the
①
bottom thread is become strong by tight the s
-crew
, loose the screw to make it weak.
①
Caution : The adjust standard of the bottom
thread tension: Rotating the adjusting screw
till the bobbin case can falling slowly by it’s
①
own weight.
2.Adjusting the tension of needle thread
After the lower thread tension has been adj
-usted,adjust the upper thread tension so that
a good,even stitch is obtained.
1)Lower the presser foot by using the lifting
lever.
2)Adjust by turning the tension nut
②
: The
tension of the upper thread will become stron
-g when turning toward the clockwise(A), oth
-erwise weak when toward anti-clockwise (B).
Caution:
1.To prevent the unexpected startup
of sewing machine, trim off the pow
-er supply before the operation is co
-nducted.
Fig.30
②
A
B
Fig.29
①
ZOJE Europe 2022