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16. Installation of needle guards
[Checking items]
1
Needle guard
2
Needle
* Check that the clearance between the needle
2
and the front
needle guard
1
is 0 to 0.1 mm
A
when the needle bar is at the
lowest position of the stroke.
[How to perform adjustment]
○ Set the needle bar in its lowest position of the stroke.
○ Loosen the setscrews
B
of the front needle guard
1
.
○ Move the front needle guard
1
to perform adjustment.
○ Tighten the setscrews
B
.
2
B
1
0 to 0.1 mm
A
17. Position of upper looper thread take-up
[Checking items]
1
Upper looper thread take-up
2
Setscrew
3
Looper cover hinge
* Check that the distance between the lower end of upper looper
thread take-up
1
and the top surface of looper cover hinge
3
is the dimension
A
(described below) when the upper looper is
at the lowest position of the stroke.
Dimension
A
MO-114D 6.0 ± 0.5 mm
MO-104D 7.5 ± 0.5 mm
[How to perform adjustment]
○ Set the upper looper in its lowest position of the stroke.
○ Loosen the setscrew
2
.
○ Adjust the position of upper looper thread take-up
1
.
○ Tighten the setscrew
2
.
3
2
1
A
