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MECHANICAL ADJUSTMENT
NEEDLE SWING
TO CHECK:
IF THE NEEDLE BAR MOVES SIDEWAYS WHILE THE NEEDLE IS IN THE FABRIC IN
ZIGZAG STITCHING, ADJUST IT AS FOLLOWS:
(THE NEEDLE SHOULD
START SWINGING
2 (0.08") TO 3 MM (0.12") ABOVE THE
NEEDLE PLATE.)
ADJUSTMENT
PROCEDURE:
1.
REMOVE THE TOP COVER (SEE P.6), SET THE PATTERN SELECTOR DIAL AT" _
",
AND SELECT THE MAXIMUM ZIGZAG WIDTH.
2.
LOOSEN THE TWO HEXAGONAL SOCKET SCREWS ON THE UPPER SHAFT WORM.
3.
WHILE HOLDING
THE UPPER SHAFT WORM IN PLACE, CAREFULLY
TURN THE
HANDWHEEL AND ADJUST IT SO THAT THE LATERAL NEEDLE SWING STARTS FROM
A POSITION 2 MM (0.08") TO 3 MM (0.12") ABOVE THE NEEDLE PLATE IN RIGHT
OUTFLOW.
4.
TIGHTEN THE TWO HEXAGONAL SOCKET SCREWS ON THE UPPER SHAFT WORM.
5.
ATTACH THETOP
COVER (UNIT).
NOTE: FOR REMOVAL AND REPLACEMENT
OF THE TOP COVER (UNIT), REFER TO
PAGE 2, AFTER THE TIMING ADJUSTMENT OF THE LATERAL NEEDLE SWING,
MAKE SURE THAT THERE IS NO BACKLASH BETWEEN THE UPPER SHAFT
WORM
AND THE OTHER
GEAR,
AND THAT A SMOOTH
ROTATION
IS
OBTAINED.
HEXAGONAL
GEAR
UPPER SHAFT
WORM
,,, -,
THE BACKLASH
THE BACKLASH
IS DECREASED.
IS INCREASED.
©
(NOTE)
MAKE SURE THE WORM DOES
NOT MOVE
SIDEWAYS
WHEN
TURNING THE UPPER SHAFT.
OTHERWISE,
THE BACKLASH
BETWEEN THE WORM AND THE
GEAR WILL CHANGE.
t
i
//////l
i
iv///////
_
2-3 MM
i
i
(RIGHT
OUTFLOW
SEART
i
,
POSITION)
14
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