48
PFM-4000
Part Number 6Z8303
Timing Procedures
Setting the Overedge Looper
The measurement from the point of the overedge looper to the center of the
needle should be 2.5 mm.
To set the overedge looper:
1
Rotate the handwheel until the looper is in its farthest left position.
2
Loosen the looper lever screw just enough so that you can move the lever
manually.
3
After setting the looper at 2.5 mm, locate the centering screw.
4
Rotate the handwheel and watch the looper as it moves behind the needle.
The looper should pass as closely as possible to the back of the needle,
without contacting the needle.
5
If the looper deflects the needle, use the centering screw to move the looper
front and back.
6
After the looper is correctly set, tighten the looper lever screw.
Figure 7.4
Setting the overedge looper
Timing the Spreader
Spreader
The spreader
on this flange machine is a
small, forked, metal part
used to form the triangle
needed for proper stitch
formation.
The spreader on the PFM-4000 Flange Machine is located on the right side of the
looper, on the spreader rod. It picks up the thread from the overedge looper and
delivers it to the needle with an upward arcing motion. During this process, the
spreader forms a triangle with the thread. Then, as the needle moves behind the
spreader with a downward motion, it picks up the thread from the spreader and
completes the stitch formation. To achieve the proper functioning of the spreader,
you will need to set the spreader timing and the spreader height. The timing and
the height settings are achieved simultaneously.
