13
MECHANICAL ADJUSTMENT
NEEDLE BAR HEIGHT
TO CHECK:
WHEN THE TIP OF SHUTTLE HOOK MEETS THE LEFT SIDE OF THE NEEDLE IN
ASCENDING TRAVEL OF THE NEEDLE FROM ITS LEFT AND LOWEST POSITION,
THE DISTANCE BETWEEN THE TOP OF THE NEEDLE EYE AND THE TIP OF THE
SHUTTLE HOOK SHOULD BE IN THE RANGE OF 2.9-3.5 MM.
ADJUSTMENT PROCEDURE:
1.
OPEN THE FACE COVER.
2.
SET THE PATTERN SELECTOR DIAL AT " ".
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 NEEDLE BAR CONNECTING STUD SCREW (A).
7.
ADJUST THE HEIGHT OF THE NEEDLE BAR BY MOVING THE NEEDLE BAR UPWARD
OR DOWNWARD WITHOUT TURNING IT.
8.
TIGHTEN THE SCREW (A).
9.
ATTACH THE SHUTTLE RACE RING.
SCREW (A)
NEEDLE BAR
TIP OF SHUTTLE HOOK MEETS
LEFT SIDE OF NEEDLE
2.9–3.5 MM
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