5. STANDARD ADJUSTMENT (MACHINE HEAD)
5-5. Needle to shuttle hook point gap adjustment
5-5-1. First bar tacking
2. Turn the pulley and align the shuttle hook point with the needle center. Loosen set screw
q
and turn the
eccentric connecting link stud
w
to adjust the needle to shuttle hook point gap to 0.01 - 0.08 mm.
5-5-2. Second bar tacking
NOTE: Check that the needle is protruding from above the needle plate.
1. Turn the drive shaft
w
of the lower shaft module
q
clockwise until the point of the shuttle hook of
the lower shaft module
q
is almost at the correct timing position.
2. Turn the upper shaft pulley to raise the needle bar from its lowest position until the lowest reference
3. Turn the drive shaft
w
of the lower shaft module
q
, and then loosen the set screw
e
and turn
the eccentric connecting link stud
r
to adjust so that the clearance between the needle and the
point of the shuttle hook is 0.01 - 0.08 mm when the point of the shuttle hook of the lower shaft module
q
is aligned with the center of the needle
NOTE
●
Because the upper shaft and lower shaft operate independently of each other, you should check that
the needle does not interfere with the shuttle hook or the driver when the needle moves inside the
shuttle hook of the lower shaft module.
●
Also check that the needle does not interfere with the shuttle hook or the driver in the same way when
the lower shaft module is rotating. Interference can result in broken or bent needles.
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39
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BAS-705
w
q
q
e
w
r
0.01
〜
0.08mm
0.01
〜
0.08mm
