– 5 –
5. Position of feed dog
[Checking items]
1
Main feed dog
2
Sub feed dog
3
Throat plate
* Check that the feed dogs (
1
and
2
) and the slot in the throat plate
3
are parallel with each other.
* The clearances of the right and left side between the feed dogs (
1
and
2
)
and the slot in the throat plate
3
are equal.
* Check that the throat plate
3
does not come in contact with the main
feed dog
1
at the most receded position when the stitch length is 4 mm.
* Check at the most-advanced position in max. main feed and min. sub
feed the clearance between the main feed dog
1
and the sub-feed dog
2
is 1
+0.4
- 0.5
mm
C
.
[How to perform adjustment]
○ Loosen the setscrews
D
of the main feed dog
1
.
○ Adjust the position of the main feed dog
1
so that the throat plate
3
does not come in contact with the main feed dog
1
at the most receded
position when the stitch length is 4 mm.
○ Tighten the setscrews
D
.
○ Loosen the setscrews
E
of the sub feed dog.
○ Adjust the position of the sub feed dog
2
so that at the most-advanced
position in max. main feed and min. sub feed the clearance between
the main feed dog
1
and the sub-feed dog
2
is 1
+0.4
- 0.5
mm
C
.
○ Tighten the setscrews
E
.
○ Check that the main feed dog
1
and the sub feed dog
2
are attached
in parallel.
E
D
3
C
2
B
1
Clearances are equal.
