HIGHLEAD GC1998-MCDZ, Instruction Manual

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11) Adjustment of feed dog height and inclination
(1) As a standard, the eccentric shaft
①
mark on the left of the horizontal feed arm is set to the direct
left side, and the feed dog height is set to 0.8mm (maximum) as shown in the figure.
(2) To adjust the feed dog height and inclination,
loosen the screw
③
, and turn the eccentric
shaft
④
, loosen the screw
②
at the left of the
horizontal feed arm, and turn the eccentric shaft
①
.
(3) When the eccentric shafts are set to "DOWN"
position, puckering may be avoided and free
loop is less likely to occur.
(4) When the eccentric shafts are set to "UP" posi-
tion, misalignment of fabrics is less likely to oc-
cur and yarn severance may be avoided.
12) Adjustment of remaining needle thread
length after thread trimming
(1) Turn the pretension nut
①
and adjust.
(2) When turned clockwise, the length of thread left
in the needle will be short.
When turned counterclockwise, the length of the
thread left in the needle will be long.
13) Adjustment of feed timing
(1) Adjust by changing the position of the vertical
feed eccentric ring.
(2) As a standard, the vertical feed timing Is set to
when the screw
①
on the bearing bushing is
linear with screw
②
on the vertical feed eccen-
tric ring.
(3) When the eccentric ring is moved in the direction
of a, the vertical feed dog will rise earlier.
(4) When the eccentric ring is moved in the direction
of b, the vertical feed dog will rise later.