23
15) Timing Adjustment of Trimmer
(1) Turn the pulley
①
manually and align the red carved sign
②
on the pulley and the carved sign
③
on the arm.
(2) Separate the return spring
④
.
(3) Push the trimming lever
⑤
so that the thread trimming knife
⑦
on the hill of the movable knife
⑥
is about 1~1.5mm more
protruded than the end point of the fixed blade
⑧
.
(4) Push the trimming solenoid shaft
⑩
manually while the trimming cam fixing screw
⑨
is loose.(At this point, the
appropriate distance between the initial trimming cam
⑪
and the roller single screw
⑫
is 0.5mm.)
(5) Turn the trimming cam
⑪
manually so that the edge
⑬
of
the roller driving part on the trimming cam
⑪
touches
the roller
⑭
. Then tighten the trimming cam fixing
screw
⑨
.
(6) Connect the return spring
④
.
[Fig. 36]
[Fig. 37]
[Fig. 38]
Trimming Shaft
Lower Shaft
White Dot
(Synchronization color point)
Keystone Sewing Machine Company, Inc.
