Needle Swing - Janome 502X Servicing Manual

NEEDLE SWING

TO CHECK:
SET THE PATTERN SELECTOR DIAL AT "
IF THE NEEDLE MOVES SIDEWISE WHILE THE NEEDLE IS COMING OUT FROM THE FABRIC, ADJUST
IT AS FOLLOWS:
(THE NEEDLE SHOULD START SWINGING WHEN ITS TIP IS AT 2 MM (0.08") TO 3 MM (0.12") ABOVE
THE NEEDLE PLATE IN UPWARD MOTION).
ADJUSTMENT PROCEDURE:
1. REMOVE THE FACE COVER AND FRONT COVER (SEE PAGES 6 AND 7).
2. SELECT THE PATTERN SELECTOR DIAL AT "
3. LOOSEN THE TWO HEXAGONAL SOCKET SCREWS ON THE UPPER SHAFT WORM.
4. WHILE HOLDING THE UPPER SHAFT WORM IN PLACE, CAREFULLY TURN THE HANDWHEEL AND
ADJUST SO THAT LATERAL NEEDLE SWING STARTS FROM A POSITION 2 MM (0.08") TO 3 MM
(0.12") ABOVE THE NEEDLE PLATE IN RIGHT OUTFLOW MOTION.
5. TIGHTEN THE TWO HEXAGONAL SOCKET SCREWS ON THE UPPER SHAFT WORM.
6. ATTACH THE FRONT COVER AND FACE COVER.
NOTE: MAKE SURE THAT THERE IS NO BACKLASH BETWEEN THE UPPER SHAFT WORM AND
CAM BLOCK GEAR, AND THE UPPER SHAFT SHOULD TURN SMOOTHLY.
HEXAGONAL SOCKET
SCREWS
GEAR
NEEDLE PLATE
MECHANICAL ADJUSTMENT
" AND MAXIMUM ZIGZAG WIDTH.
UPPER SHAFT WORM
2-3 mm
(RIGHT OUTFLOW MOTION)
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" AND SET THE ZIGZAG WIDTH AT "5".
THE BACKLASH IS
INCREASED.
IF THE UPPER SHAFT WORM DEVIATES LATERALLY
WHEN TURNING THE UPPER SHAFT, THE BACKLASH
BETWEEN THE GEARS WILL CHANGE.
11
THE BACKLASH IS
DECREASED.