JUKI LK-1900B series, Руководство инженера

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Adjustment procedures Results of Improper adjustment
1. If the thread on Side
B
cannot be cut, grind Side
C
. If the thread
on Side C cannot be cut, grind Side B .
(Caution) When grinding the side, make the angle more acuter
than 90 degrees.
o
When less than 0.2 mm:
Thread on Side C cannot be
cut.
o
When more than 0.2 mm:
Thread on Side
B
cannot be
cut.
Adjustment procedures Results of Improper adjustment
1. Turn off the power supply and look for any close contact between
the AT solenoid
❶
and the thrust collar
❷
.
2. Loosen the three setscrews ❸ and remove the thread tension
cap
❹
.
3. Hold the tension releasing pin adjust collar ❺ not to let it rotate,
and loosen the nut
❻
.
4. Turn the tension releasing pin adjust collar ❺ and adjust the gap
between the thread tension discs
❼
. (Adjustment of thread ten -
sion disc floating)
5. Hold the tension releasing pin adjust collar
❺
and tighten the nut
❻ . Mount the thread tension cap ❹ by means of the setscrew ❸ .
6. Turn on the power supply and set up the thread tension. Confirm
that the thread tension discs ❼ are closed.
o
If the amount of disc floating
is too less, the residual thread
length can be changed or short-
ened when the thread is thick.
o
If the amount of disc floating
is too much, the tension discs
cannot close completely and
normal thread tension may fail to
be chosen. This can be a cause
of imperfect sewing.
Secure an acute angle.