Loading ...
Loading ...
Loading ...
SEWING MACHINE DIV. 20 MODEL 385.19001890
MECHANICAL ADJUSTMENT
NEEDLETHREADTENSION
TO CHECK:
1. WHEN THE POLYESTERSEWING THREAD _ (WHITE) ISPASSED THROUGH AND PULLED
UP AS IN FIG.l, THE THREAD TENSION SHOULD BE 75_"l° GRAMS (THE THREAD PULLING
SPEED:APPROX. 110 MM/SEC.) WITH THETHREAD TENSION DIAL SETAT "4".
ADJUSTMENT PROCEDURE:
I. REMOVE THE FRONT COVER UNIT(SEEP.24).
2. PULL THE ADJUSTING PLATE SPRING (C) AWAY FROM THE LEAD SCREW (D)AND ADJUST
BY TURNING THE LEAD SCREW (D).
- WHEN THE TENSION ISSTRONG, TURN THE LEAD SCREW INDIRECTION "A".
- WHEN THE TENSION ISWEAK, TURN THE LEAD SCREW INTHE DIRECTION "B".
3. ATTACH THE FRONT COVER UNIT.
ZL
/-
THREADTENSION DIAL AT "4"
FIG. 1
ADJUSTING PLATESPRING (C)
ADJUSTING PLATESPRING (C)
LEAD SCREW (D)
NEEDLE THREAD
P OLYESTERSEWING THREAD #50 (WHITE)
39
Loading ...
Loading ...
Loading ...