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Adjustment procedures
Results of Improper adjustment
[Counter knife]
1. Fix the counter knife
❹
to the throat plate
❻
with two setscrews
❺
.
(Caution) Make sure that the hole of counter
❹
knife and the
hole of needle hole guide is not shifted.
[Moving knife]
1. Fix the moving knife
❼
to the moving knife base
❷
with two set-
screws
❸
.
At this time, the moving knife
❼
becomes straight in the direction
of a bend section of the moving knife base
❷
.
2. Insert the moving knife washer
❽
(see Table 1) between the
throat plate
❻
and the moving knife base
❷
, x the moving knife
base
❷
with the hinge screw
❶
.
3. Move the moving knife base
❷
to back and forth, check the align-
ment of the moving knife
❼
and the counter knife
❹
.
If movement of the moving knife
❼
is heavy , replace the moving
knife washer
❽
as a thinner ones. (It is possible to perform the
thread trimming in a state in which the moving knife
❼
and the
counter knife
❹
is engaged lightly.)
4. Through three spun threads equivalent #60 from the needle hole
guide of the top surface of the throat plate
❻
, move the moving
knife base
❷
to conrm the thread trimming.
At this time, if the thread trimming failure occurs, replace the
moving knife washer
❽
as a thicker ones.
* The moving knife washer
❽
is a same washer with the main
thread trimming device on the throat plate, lower (asm.). (See
"3.-(16) Adjustment of the height of the moving knife and counter
knife".)
o
The position of the moving knife
❼
is decided by a countersink
screw, but when the moving
knife
❼
is mounted aslant, it
does not engage with the count-
er knife
❹
. As a result, thread
trimming failure will occur.
o
Engagement of the moving knife
❼
and the counter knife
❹
is too
tight, service life of the knives
will be shortened.
In addition, a load of the cylin-
der will increase, operation of
the thread trimming unit may be
worse.
Adjustment procedures
Results of Improper adjustment
1. Insert the pin
A
of cylinder guide
❶
to the elongated hole
B
of
moving knife base
❷
.
2. Move the cylinder
❸
to the most advanced position in a state that
an air is not supplied. Adjust the initial position of moving knife by
two nuts
❹
so that the elongated hole of blade portion of mov-
ing knife and the hole of needle hole guide are not overlap. (As
a standard, a distance between the cylinder
❸
and the cylinder
guide
❶
is 7.5mm.)
o
If the initial position of moving
knife is inadequate, the needle
comes in contact with the mov-
ing knife, needle breakage will
be caused.
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