– 17 –
– 17 –
‒ 17 ‒
6. Adjusting the looper thread cam eyelet
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the follow-
ing work after turning the power off and ascertaining that the motor is at rest.
When the thread drawing amount is desired to be de
-
creased in case of 2-needle machine or the like, loosen
screws
❸
, move upward thread guides
❶
and
❷
and
tighten screws
❸
to fix them.
A
= Decrease
B
= Increase
Standard adjustment is achieved in the following state:
①
The lower end face of the thread guide is aligned with
the marker dot
②
The right and left thread guide thread paths are leveled
7. Adjusting the looper
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the follow-
ing work after turning the power off and ascertaining that the motor is at rest.
[Lateral position]
The relation between clearance
A
between looper
❶
and
the center of right-hand needle and the needle gauge is as
shown in the table.
[Longitudinal position]
Adjust so that the clearance between blade point
❺
of the
looper and medium needle
❹
is 0 to 0.05 mm when the
top end of the looper comes from the extreme right posi
-
tion to the center of the medium needle. After the adjust
-
ment, tighten clamp screw
❷
to fix the looper.
* The blade point of the looper comes in contact with the
right-hand needle when rear needle guard
❻
does not
work. So, be careful.
Loosen clamp screw
❷
and laterally adjust looper holder
❸
in accordance with the table.
Unit : mm
2-needle
3-needle
Needle gauge
Return amount A
Needle gauge
Return amount A
3.2
4.9
4.0
4.5
4.8
4.1
4.8
4.1
5.6
3.7
5.6
3.7
6.4
3.3
6.4
3.3
A
❶
❷
❸
B
A
B
0 - 0.05 mm
❶
❷
❸
A
❶
❻
❺
❹
The right and
left thread guide
thread paths
are leveled
The lower end
face of the
thread guide
is aligned with
the marker dot
