Operation Manual

– 10 –
1) The standard tilt (horizontal) of the feed dog is ob-
tained when marker dot
A
on the feed bar shaft
is aligned with marker dot
B
on feed rocker
1
.
(DDL-8700H, the marker dot
B
inclines forward
the feed rocker shaft by 90˚, as standard).
2) To tilt the feed dog with its front up in order to pre-
vent puckering, loosen the setscrew, and turn the
feed bar shaft 90˚ in the direction of the arrow, us-
ing a screwdriver.
3) To tilt the feed dog with its front down in order to
prevent uneven material feed, turn the feed bar
shaft 90˚ in the opposite direction from the arrow.
(The standard tilt for DDL-8700H.)
Whenever the feed dog tilt is adjusted,
the feed dog height will be changed. So, it
is necessary to check the height after tilt
adjustment.
1
A
B
a
b
c
d
20.
TILT OF THE FEED DOG
a
Front up
b
Standard
c
Front down
d
Throat plate
21.
ADJUSTING THE FEED TIMING
1) Loosen screws
2
and
3
in feed eccentric cam
1
,
move the feed eccentric cam in the direction of
the arrow or opposite direction of the arrow, and
rmly tighten the screws.
2) For the standard adjustment, adjust so that the
top surface of feed dog and the top end of needle
eyelet are ush with the top surface of throat plate
when the feed dog descends below the throat plate.
3) To advance the feed timing in order to prevent un-
even material feed, move the feed eccentric cam
in the direction of the arrow.
4) To delay the feed timing in order to increase stitch
tightness, move the feed eccentric cam in the op-
posite direction from the arrow.
Be careful not to move the feed eccentric
cam too far,or else needle breakage may
result.
Standard feed timing
Advanced feed timing
Delayed feed timing
1
2
3
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.