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SEWING MACHINE DIV. 20 MODEL 385.19001890
MECHANICAL ADJUSTMENT
BOBBIN THREADTENSION (I)
*STANDARD BOBBIN THREAD TENSION IS 13 __ GRAMS.
1. INSERTA BOBBIN WOUND WITH "KING" MARK POLYESTERTHREAD (#50 WHITE) INTO THE
BOBBIN HOLDER.
THREAD THE BOBBIN HOLDER AND AT[ACH THE END OF THE BOBBIN THREAD TO THE
POINT OF THETENSION METER.
2. PULL ITIN THE DIRECTION OF THEARROW AT A SPEEDOF 50 MM/SECOND.
- IFTHE TENSION ISTOO STRONG, TURNTHESCREW COUNTERCLOCKWISE,
- IFTHE TENSION ISTOO WEAK, TURNTHE SCREW CLOCKWISE.
THREAD PULLING SPEED...50 MM/SECOND
THREAD PULLING DERECTION
1-2MM 1
SCREW
45
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