– 20 –
0 to 0.2
Needle
Blade point
4. Height of feed dog
™ Set stitch dial to 2 and bring feed dog to its highest
position.
™ See the height on the rear side of feed dog.
™ Bottom of tooth of feed dog should be aligned with
top surface of throat plate.
(Figure on the right side : protruding amount from
top surface of throat plate is 1.2 ± 0.1 mm.)
™ Perform adjustment with 1 vertical feed shaft arm.
5. Feed timing
™ Set stitch dial to P=2.
™ Lower feed dog in the normal feed operation and align it with top surface of throat plate.
™ At this time, clearance provided between needle top and top surface of throat plate is 0 ± 0.2 mm.
™ Perform adjustment with feed cam setscrew.
6. Needle-to-hook timing
™ Loosen three setscrews in hook.
™ Adjust blade point of hook and left edge of needle
to 0 to 0.2 mm when needle bar lifts by 2.17 mm
from its lower dead point.
™ Check clearance between needle and hook, and
tighten setscrews.
Remove bobbin case positioning finger to improve
the work.
Standard of position of 2 mm from lower dead point
of needle bar is that of engraved lines 1 to 2 on
needle bar.
(1 Lower dead point, 2 Position of lifting 2 mm)
7. Clearance between needle and hook
™ Loosen three setscrews in hook.
™ Adjust blade point of hook to position of 0.2 mm
from left edge of needle.
™ Adjust clearance between blade point of hook and
needle to 0.02 to 0.07 mm.
™ Temporarily tighten setscrews, check timing, and
securely tighten setscrews.
Top surface of throat plate
1.2 ± 0.1 mm
Feed cam setscrew
Needle : TL-98Q (HA x 1 #14)
TL-98QE (HL x 5 #14)
Top surface of throat plate
0±0.2 mm
Hook
2
1
1 Vertical feed shaft arm
2 Shaft arm setscrew
0 to 0.2
1.33 mm
0.02 to 0.07 mm
Lifting amount
2.17 mm
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