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10. Summary of all sewing machine settings
ATTENTION!
The complete setting of the special sewing machine is to be made in
the order described.
No. Subject Chapter Correct setting Adjustment
1
Zero point, feed
with devices
Setting of the zero point
(position of the stitch
regulator link)
2.1
When the stitch length is set to 0”,
the feed dog and the needle should
not make any advancing motion.
Setatthefactory.
2
3
Bottom feed
Position of the feed dog in
the throat plate cutout
Advancing movement of the
feed dog
2.2.1
2.2.2
Sideways:
The feed dog must lie centric in the
throat plate cutout.
In the feeding direction:
At the maximum stitch length, the
minimum clearance of the feed dog
to the front and rear edges of the
throat plate cutout must be approx.
0.5 mm.
When the stitch regulator lever is
operated and set to have the
greatest sewing length, both the
needle and the feed dog should not
move.
Slide the feed dog
axially.
Turn the feed dog
lever on the fork.
Turn the thrust cam.
4 Synchronous run of the
needle and bottom feed
2.3 The needle must penetrate the
middle of the needle hole.
Align the needle bar
with the rocker.
Upper feed
5 Stroke of the upper feed and
the material presser foot
2.4.1 The stroke of material presser foot
and upper feed should be equal.
Turn the upper feed
lever.
6 Advancing movement of the
upper feed foot
2.4.2 The upper feed foot should reach
the top edge of the feed dog at
the same time as the descending
needle.
Turn cam.
Stitch regulator
8 Stitch uniformity of forward
and reverse stitching
2.5 The stitch length for forward and
reverse sewing must be equal.
Turn the cam
located inside the
cast iron.
25
GB
29


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