SunStar KM-1957-7, Руководство пользователя

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4) Adjusting lower thread holder
※
When the movable knife
①
has finished trimming and
returned to its original position (arrow
Ⓐ
), loosen the fixing
screw
③
so that the clearance between the movable knife
edge and the edge of the lower thread holder
②
is about
8mm and the equal point of the lower thread edge is about
0.5mm inside (arrow
Ⓑ
). Make sure to check whether the
inside of the movable knife and the equal point of the lower
thread holder edge is completely touching as in part
Ⓒ
, like
in Figure 61.
4. Checkpoints on the assembling status of other trimming devices
1) Check the starting point of the movable knife when the
trimming action takes place
Operate trimming movement manually to check whether the
thread take up lever is in the lowest or at least 16mm raised
level when the movable knife starts working, like in Figure 62.
2) Maintenance of fixed knife
When the thread does not get trimmed or if the trimmed
section of the thread is sloppy, please check the edge
condition of the fixed knife.
If the edge of the knife is too dull, sharpen the edge using
oil stone or sand paper.
5. Exchanging movable knife and fixed knife
1) Open the hook cover.
2) Loosen the screw
①
and remove the fixed knife holder
cover
②
.
3) Loosen the fixing screw
③
to disassemble the washer
④
and fixed knife
⑤
.
4) Loosen the bolt
⑥
and dissemble the movable knife
⑦
.
※
To assemble, follow the reverse order of disassembling.
8-9. Adjusting gear box(KM-1967-7)
1) The forward/reverse gear
①
interlocks with the switching gear
③
in case of normal stitching, the forward/reverse gear
②
interlocks with the switching gear
③
in case of back tack stitching.
2) The operation direction of gear box
④
is identical to the arrows in the figure.
3) Interlock the forward/reverse gear
①
with the switching gear
③
without a gap under the state of pneumatic connection.
4) Under this state, adjust the stopper screw
⑤
and nut
⑥
then fix them tightly to make the cylinder stroke to 3.5mm~4mm.
5) Operate the air pressure to move the gear box
④
toward the direction of back tack stitching and interlock the forward/reverse
gear
②
with the switching gear
③
without a gap.
[ Figure 61 ]
[ Figure 62 ]
about 16mm
Lowest point of thread
take up lever
(OIL STONE) (SAND PAPER)
[ Figure 63 ]
[ Figure 64 ]
④
③
②
①
⑤ ⑥
[ Figure 65 ]