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6. Relative
position
between
looper
and
spreader
1)
When the spreaders locate at the extremely left
position, right side of spreader must meet the right
side of looper.
Adjust as follows.
1)
Temporarily tighten screw (A) for spreader holder.
2)
Turn pulley to move the spreader to the extremely
left position. Fastening screw (A) in Fig. 11 when
the above relative position is satisfied.
Note:
For spreader adjustment, adjust A and B at the
same time. The clearance between loopers and spreaders
should be within 0.1mm as shown in Fig. 12. (Use the
clearance guage.)
Looper retainer adjustment
The looper retainer should be adjusted so that the
needle bar is 20mm below the upper end position (at
this time, the needle is at the center behind the looper)
so that the retainer bar can move upwards.
To adjust, do as follows.
1) Loosen the retainer eccentric screw H in Fig. 13, and
then, tighten this crew temporarily.
2) Rotate the pulley and adjust the looper retainer.
Turn the retainer eccentric I in Fig. 13 to increase
looper retainer speed, and clockwise to decrease
speed.
3) For fine adjustment, loosen screw G in Fig. 13, and
then, move the retainer thread eyelet up and down.
12. Adjustment of feed gear rack
(A) Height of feed gear rack
The proper height of the feed gear rack from the
needle plate top is 0.8 —1.2mm as shown in Fig. 14,
when the rack is at the uppermost position.
Adjust the height as follows.
1. Loosen the feed gear rack fixing screw (C in Fig.
14).
2. Adjust and set the feed gear rack to the height
described above, and tighten the fixing screw
(C in Fig. 14).
(B) Parallel alignment of feed gear rack
Install the feed gear rack parallel to the needle plate.
Adjust parallelism as follows.
1. Loosen the Y-screw.
2. Adjust the X-screw so that the feed gear rack is
parallel to the needle plate.
3. After adjustment, tighten the Y-screw.
0.1mm
Fig. 12
Fig. 11
Fig. 13
Needle plate
^
0.8- 1.2 mm
Feed gear rack
installation base
Feed system body
Fig. 14
I
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