17.
PRESSER FOOT AND FEED DOG
1
~
-
*
Contact of the presser foot with the throat plate
top surface
Using adjust screw
@
,
perform adjustment so that the sole c~f
the presser foot evenly comes in contact with the top surface
of the throat plate when presser foot
0
comes down.
*
Height of feed dog
1.
Feed dog
0
is usually set so that its teeth protrude about
1.3
rnm
from the throat plate surface at the highest point in
its trajectory.
Reduce the protrusion for light weight
materials.
2.
Use setscrew
@
to adjust the protrusion of the feed dog
teeth.
3.
Using setscrew
,
make adjustment so that differential
feed dog
Q
is level with the main feed dog.
4.
Adjust the height of auxiliary feed dog
by
setscrew
so that it is
0.5
rnm
lower than the main feed dog.
Front
up
p=YY1
line
'
(Q
*Tilt
of feed dog
1.
Loosen screw
Q
,
and turn eccentric shaft
0
in
the direc-
tion of the arrow to make the feed dog front up or turn it
in the reverse direction to set the feed dog front down.
2.
The feed dog should be levelled when the dot engraved on
the eccentric shaft faces exactly to the line.
-
18. CHAIN LOOPER THREAD CAM (MOG-2516N)
Parallel
Loosen setscrew
B
,
and adjust chain looper thread cam
0
so that, when the needle is in the highest position of
its
stroke,
the flat part of chain looper thread cam
0
is in parallel to
the top surface of thread guide
@
.
Be sure that the chain
looper thread cam releases the looper thread when the needle
point is about
2
mm below the throat plate bottom surface.
i---
I
Approx.
2
mrn
19.
THREAD GUIDE
AND
LOOPER THREAD
TAKE-UP
The table below shows the standard demensions of the individ-
ual thread
gu~des and looper thread take-ups when the upper
looper has gone back farthest.
r
7----
I
-
I--
-
1
..
__I
63
63
6
3
I
41
--
+
41
26
r.-.~
~.
.
F
I
26
+
-
A
--
-
~
-~
(;
4
4
-
~
41
!
26
1
44
1---
-
~~+
-
-
,
H
26.5
18
9
-
-I-
-
+
.
--
-~
+
.
J
I
1
17
17
*--.-
~
+.-.
-
~
~~.~--
-~-~
.
~
~
~.~--+
~
~-
---
J
22.5
19.5
*-
~
-&
.
--
~-
-+~-
-
~~
-
22.5
+
-
.
1
K
Y
1
:3
9
L~.~~.-~
-~
.--
.*
+
~-
.
.
1-
--
~
~
-
58.5
(!.init
:
mm)
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