– 7 –
7. Adjusting stroke of sub feed dog (MO-114D)
[Checking items]
1
Main feed dog
2
Sub feed dog
3
Throat plate
* Adjust the stitch length to 4 mm.
* Set the differential feed ratio at "N".
* Turn the handwheel to move the feed dog up and down. Check that the
difference of clearance (
A
-
A
') between the main feed dog
1
and the
sub feed dog
2
is 0 ± 0.1 mm when the teeth tip of feed dog teeth is
aligned with the top surface of throat plate
3
during its upward/down-
ward movement.
[How to perform adjustment]
○ Loosen the setscrew
C
of the eccentric stud
D
.
○ Turn the eccentric stud
D
to perform adjustment.
○ Tighten the setscrew
C
.
C
D
2 21 1
A
'
A
Same line
3
A
-
A
' = 0 ± 0.1 mm
3
A
A
'
2
1
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