13
< Note >
Since the needle guard is installed on the feed bar, 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.
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7
】
ADJUSTING THE NEEDLE GUARD
When the looper moves to the right from the extreme left
end of its travel, the looper passes behind the needle.
When the point of the looper has reached the centerline of
the needle, the needle should be 0 ~ 0.5mm deflected by
needle guard M. Adjustment is made by loosening screw
N. The needle guard should be installed as low as
possible.
In addition, the needle must touch the needle guard surface
until the point of the looper passing behind the needle
reaches the right side of the needle.
Adjustment is made by loosening screw O.
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8
】
ADJUSTING THE FEED DOGS & STITCH LENGTH
8888----1
1
1
1 To install and adjust the feed dogs
To install and adjust the feed dogs
To install and adjust the feed dogs
To install and adjust the feed dogs
■
Position of the feed rocker arm eccentric pin
Eccentric pin A which is located at the middle of the
cylinder is used for a fine height adjustment on the main
and differential feed dogs. Before installing the main and
differential feed dogs, set the groove on the eccentric pin in
a vertical position and then fasten the eccentric pin with
screw B. The above adjustment should be made in order
to raise the main and differential feed dogs simultaneously
(the extreme rear ends of these feed dogs must be 2.5mm
raised). Assemble eccentric pin A so that the feed dogs
can be raised by turning eccentric pin A clockwise.
■
To assemble the feed dogs
1. Install feed dog C with screw D.
2. Fit feed dog support E onto feed dog C and tighten
screw F.
3. Fit differential feed dog G slightly onto feed dog C and
tighten screw H.
4. Check to see if the machine pulley turns easily with
differential feed effective.
■
Feed dog height
When the main feed dog is in its highest position, the first
tooth from the front should be 1.5mm above the needle
plate. Adjustment is made by loosening screws D, F and
H.
■
Position of the feed rocker arm
If the feed dogs touch the slots of the needle plate at the
front or back, adjust the position of the feed rocker arm.
Adjustment is made by loosening screw I, turning eccentric pin J and moving feed rocker
arm K front or back as required. To turn eccentric pin J, tap the V groove on the brim of
the pin with a tapered tool. After this adjustment, secure feed rocker arm K and feed
link L with screw I while checking there is no play on these parts.
