14.
HEIGHT OF NEEDLE
When the needle bar is at the hghert polnt of its stroke, the overlock needle po~nts should be 14
2
mm and
14
mm,
respectively
above the throat plate surface
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-
-
--
-
-
-
-
-
-
-
--
-
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MOG-2504N MOG-2514N
MOK-2516N
(Reference Left)
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1
15.
SETTING THE LOOPERS
1
Most
retreated
I
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I
*
Lower looper
-
1.
When lower looper
0
has gone back
farthest, it should be
distanced
2.7
to
3.1
mm
from overlock needle
Q
.
2.
When the lower looper is crossed with the
needle, the clearance between them should
be 0.05 to 0.1 mm.
3.
To make adjustment, loosen setscrew
Q
and move lower looper holder
@
.
Most
retreated
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Double-chain looper
1. When double-chain looper has gone
back farthest, it should be distanced
1.8
to
2
mm from double-chain needle
@
2.
The clearance between the double-chain
looper and needle should be
0.05
to
0.1 mm when they are crossed each other.
3.
To perform the adjustment, loosen set-
screws
@
and
@
.
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*
Upper looper
1.
When upper looper
(b
has advanced farthest,
it should be
12.9
to
13.3
mm above the
throat plate surface.
2.
The clearance between
upper looper
0
and
lower looper
0
when
'
they are crossed each
other should be
0.05 to
1
O.2mm.
3.
Loosen setscrew
6
,
and adjust the position of
the upper looper.
After adjustment, tighten setscrew
B)
with
a
28
kg.cm torque.
[The specified torque can be obtained
by
fully
tightening the screw, holding the middle of the
supplied spanner (5
x
6)
@
.]
1
16.
DIFFERENTIAL FEED MECHANISM
I
1.
Loosen differential feed lock nut
Q
.
Move lever
0
up for stretching stitch
or down for gathering stitch.
2.
When you want to move the lever only slightly, use differential feed minute
-
adjust screw
@
.
3.
Position
"S"
provides
a
differential feed ratio
oT
1
:0.64,
while it provides
1
:1
stretching stitch only for the
MOG-75
14N.
4.
Gathering stitch can be
se:
up to a differentla1 feed ratio of
1
:1.76,
and up to
1
:2.9
only for
MOG-25
14N
(possible up
to
1
:4
by adjusting the internal
mechanism). The figures marked
on
the differential feed scale are just a rough
indication.
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