10. STANDARD ADJUSTMENTS
20
DA-9280
10-3. Timing of loopers running clear of needles
The loopers (1) run in back of the needles (2) in their forward
travel and in front of the needles (2) in their backward travel.
At this time, adjust so that the needles (2) are pushed by 0.1 -
0.2 mm when the loopers (1) move forward.
1. Remove forward feed arm cover (3).
2. Adjust so that the set screw at the rear of the looper
oscillating cam relative to the turning direction is positioned
forward of the adjustment hole (5) in the looper connecting
rod and is no longer visible in the hole when the set screw at
the rear relative to the forward/back cam turning direction is
aligned with the adjustment hole (4) in the cam sleeve.
*
To adjust, loosen the set screw which is at the front
relative to the forward/back cam turning direction, and
then loosen the set screw at the rear just enough so that
the forward/back cam can be adjusted.
3. After adjusting, tighten the two set screws.
4. Loosen the set screw (7) of the needle guard (6), and then
move the needle guard (6) to a position where it does not
touch the needle (2).
5. Loosen the screw (8) and move the looper holder (9) in the
direction of the arrow to adjust so that the looper (1) pushes
the needle (2) by 0.1 - 0.2 mm when the looper (1) tip is
aligned with the needle (2) center.
NOTE:
At this time, do not move the looper holder (9) in any
direction except the direction indicated by the arrow. If it
is moved in another direction, carry out the adjustments
given in “10-2. Needle and looper timing adjustment”.
6. Carry out the adjustment given in “10-4. Needle guard
adjustment”.
7. Install the forward feed arm cover
(3)
.
Turning direction
1522B
1519B
1517B
Set screw at the front
Set screw at the rear
1520B
1521B
1523B
Push 0.1 - 0.2 mm
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