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6-4 Needle height
When the point of the looper has reached the center
of the back side of the needle with the machine
pulley turning in the operating direction, the point
of the looper should be 2mm above the top of the
needle's eye (see 6-2).
When the needle bar is at the top of its stroke,
remove plug A on the side cover plate, loosen screw
C on needle bar clamp B with a 3mm hexagonal
wrench and then move the needle bar up or down as
required.
< Note >
After the above adjustment is made, check to make
sure each needle drops correctly into the center of
each needle drop hole.
6-5 Needle/looper front-to-back relationship
When the point of the looper has reached the center
of the needle, the point of the looper should be 2mm
above the top of the needle's eye.
With the looper and the needle in this position, there
should be a clearance of 0~0.1mm between the
needle and the point of the looper.
Adjustment is made by loosening screw A on the
looper avoid lever and moving looper holder B front
or back.
< Note >
When moving the looper holder front or back, check
to make sure the looper setting distance is not
changed.
DLR
series
9
6-6 Length of the looper connecting bar
On 1501 to 1504, the distance between the centers of
both connecting rods should be 100mm.
On 1508 and 1509, this distance should be 87mm.
【7】ADJUSTING THE NEEDLE GUARD
7-1 Position of the needle guard (rear)
When the point of the looper has reached the center of
the back side of the needle from the extreme right end
of its travel, align the point of the needle with bottom
surface C of the needle guard (rear).
With the needle and the needle guard (rear) in this
position, set clearance D between the needle and the
needle guard (rear) at 0.
Adjust the needle guard (rear) front to back by
loosening screw A. Adjust the needle guard (rear) up
and down by loosening screw B.
< Note >
Since the needle guard is installed on the feed dog
bracket, the relationship between the needle and the
needle guard varies according to the stitch length.
Therefore readjust the needle guard if the stitch length is
changed.
DLR
series
10
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