Janome 415, Servicing Manual

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13
MECHANICAL ADJUSTMENT
CLEARANCE BETWEEN NEEDLE AND HOOK (ADJUSTMENT METHOD NO.2)
TO CHECK:
USE THIS ADJUSTMENT METHOD NO. 2 WHEN METHOD NO.1 CANNOT BE USED.
THE CLEARANCE BETWEEN THE NEEDLE AND SHUTTLE RACE SHOULD BE –0.05 TO
+0.10 MM.
ADJUSTMENT PROCEDURE:
1. SET THE PATTERN SELECTOR DIAL AT ( ), STITCH WIDTH CONTROL AT ( 0 ).
2. REMOVE THE BASE (SEE PAGE 5) AND SHUTTLE RACE RING.
3. LOOSEN THE SCREW (A) ON THE LOWER SHAFT BUSHING AND SHIFT THE GEAR
ABOUT 0.5 MM TO THE RIGHT TO DISENGAGE GEARS.
THEN, TIGHTEN THE SCREW TEMPORARILY.
4. LOWER THE NEEDLE AND LOOSEN THE TWO SHUTTLE RACE SETSCREWS (B).
PULL UP OR PUSH DOWN THE SHUTTLE RACE TO ADJUST THE CLEARANCE
BETWEEN THE NEEDLE AND THE SHUTTLE RACE IN THE RANGE OF –0.05 TO +0.10
MM.
5. SET THE PATTERN SELECTOR DIAL AT( ), STITCH WIDTH CONTROL AT ( 5 ). TURN
THE HANDWHEEL TO CHECK IF THE CLEARANCE BETWEEN THE NEEDLE AND
INNER EDGES OF THE SHUTTLE RACE SPRING AT THE LEFT AND RIGHT NEEDLE
DROPS ARE EQUAL.
IF NOT, ADJUST BY TURNING THE SHUTTLE RACE UNIT.
6. TIGHTEN THE TWO SHUTTLE RACE SETSCREWS (B).
7. LOOSEN THE SET SCREW ON THE LOWER SHAFT BUSHING AND SHIFT THE GEAR
BACK TO THE ORIGINAL POSITION WHILE ADJUSTING THE BACKLASH.
8. TIGHTEN SCREW (A) FIRMLY.
9. ATTACH THE SHUTTLE RACE RING AND BASE.
NOTE: THE ROTARY PLAY OF SHUTTLE DRIVER SHOULD BE LESS THAN 0.3 MM
AND THE LOWER SHAFT SHOULD TURN SMOOTHLY.
AFTER THE ADJUSTMENT, CHECK THE HOOK TIMING.
SETSCREW (A)
LOWER SHAFT
BUSHING (FRONT)
SHUTTLE RACE
SETSCREW B (2 PCS.)
–0.05 TO +0.10 MM
CLEARANCE SHOULD BE EQUAL
NEEDLE
SHUTTLE RACE SPRING