14
MS5027PR
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 PAGE 7), 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 THE TOP 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.
UPPER SHAFT
WORM
HEXAGONAL
SOCKET SCREW
GEAR
THE BACKLASH
IS DECREASED.
THE BACKLASH
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.
2-3 MM
(RIGHT OUTFLOW START POSITION)