JUKI AMB-289/IP-420, Instruction Manual, Page: 25 / 33

Ⅰ–22
1) Turn OFF the air, and draw wiper
1
until it
goes no further.
2) Adjust wiper cylinder installing bases A
3
.
and B
4
with the respective setscrews
5
and
6
so that the vertical clearance
between needle tip
2
and the top surface
of wiper
1
is 3 to 5 mm and the lateral
dimension between needle tip
2
and the
thread holding section of wiper
1
is 6 to
8 mm at the sewing machine stop position
(needle bar upper dead point).
3) Fix spring A
7
so that wiper
1
and spring A
7
equally come in contact with each other
on the plane within the range of the stroke
of cylinder
8
.
4) Adjust the holding force of thread with
spring B
9
..
5) To adjust the holding force, loosen screw
!0
and adjust so that thread slips off with
the force of approximately 20 to 25g when
polyester spun thread #50 is held.
When the mode is changed over to
the button loader motion mode, do
not forget to release hook A
1
.
When the mode is changed over to the manual
button control mode, raise hook A
1
to decrease
the open amount. Adjust the open amount by
loosening screws
2
and sliding hook B
3
to the
right and left.
3 to 5mm
6 to 8mm
1
2
8
4
5
7
9
!0
6
3
1
2
1
3
(5) Adjusting the wiper mechanism
(6) Adjusting the chuck open mechanism