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SEWING MACHINE MODEL DC5100
ADJUSTING PLATE SPRING (D)
LEAD SCREW (E)
C
B
THREAD TENSION DIAL AT ''4''
NEEDLE THREAD
POLYESTER SEWING THREAD
#50 (WHITE)
FIG.1
NEEDLE THREAD TENSION
TO CHECK:
1. THE STANDARD TENSION SHOULD BE 75 TO 90 GRAMS WHEN THE TENSION DIAL IS SET AT "4",
MESURED BY A #50 WHITE POLYESTER THREAD BEING PULLED AT APPROXIMATELY
110 MM/SEC. IF THE TENSION IS OUT OF THE STANDARD RANGE, ADJUST AS FOLLOWS.
ADJUSTMENT PROCEDURE:
1. REMOVE THE FRONT COVER UNIT (SEE PAGE 15).
2. PULL THE ADJUSTING PLATE SPRING (D) AWAY FROM THE LEAD SCREW (D) AND ADJUST
BY TURNING THE LEAD SCREW (E).
—IF THE TENSION IS STRONG, TURN THE LEAD SCREW IN DIRECTION "B".
—IF THE TENSION IS WEAK, TURN THE LEAD SCREW IN THE DIRECTION "C".
3. ATTACH THE FRONT COVER UNIT.
MECHANICAL ADJUSTMENT (10)
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