16
MECHANICAL ADJUSTMENT
NEEDLE TIMING TO SHUTTLE
TO CHECK:
THE HEIGHT OF THE NEEDLE POINT FROM ITS LOWEST POINT OF TRAVEL
SHOULD BE IN THE RANGE OF 1.45-1.95 MM WHEN THE TIP OF THE SHUTTLE
HOOK JUST MEETS THE LEFT SIDE OF THE NEEDLE AT THE LEFT NEEDLE POSITION.
ADJUSTMENT PROCEDURE:
1.
SET THE PATTERN SELECTOR DIAL AT “ ”.
MODEL 2149SX, 2149, CJ24 PATTERN SELECT DIAL " ",WIDTH SELECTOR CONTROL
AT " 0 ".
2.
REMOVE THE FRONY COVER (SEE PAGE 5).
3.
OPEN THE SHUTTLE COVER.
4.
REMOVE THE SHUTTLE RACE RING.
5.
TURN THE HANDWHEEL TOWARD YOU UNTIL THE TIP OF THE SHUTTLE HOOK
MEETS THE LEFT SIDE OF THE NEEDLE.
6.
LOOSEN THE LOWER SHAFT CRANK ARM SCREWS (A).
7.
WHILE HOLDING THE SHUTTLE HOOK SO IT DOESN'T TURN, TURN THE
HANDWHEEL TOWARD YOU UNTIL THE NEEDLE COMES TO ITS LOWEST
POSITION.
THEN, FURTHER TURN THE HANDWHEEL TO RAISE THE NEEDLE ABOUT 1.7 MM
FROM ITS LOWEST POSITION.
8.
TIGHTEN THE SCREWS (A).
9.
TURN THE HANDWHEEL TOWARD YOU TO CHECK IF THE HEIGHT IS IN THE RANGE
OF 1.45-1.95 MM.
IF IT IS NOT IN THIS RANGE, REPEAT THE ABOVE PROCEDURE.
10. ATTACH THE SHUTTLE RACE RING.
11. ATTACH THE FRONT COVER.
LOWER SHAFT CRANK ARM
SCREWS (A) (2)
1.45–1.95 MM
LOWEST POSITION
LOWER SHAFT
