Adjusting Stroke Of Sub Feed Dog (Mo-114D) - JUKI MO-104D Service Manual

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 .
A
A '
1 2
D
C
– 7 –
3
1
2
A '
A - A ' = 0 ± 0.1 mm
A
1 2
Same line
3