36
PFM-4000
Part Number 6Z8303
Sewing Adjustments
Figure 6.3
Loopers
Figure 6.4
Chain stitch
Safety Stitch Looper
This looper is commonly
referred to as the left-hand
looper.
Overedge Looper
This
looper is commonly
referred to as the right-
hand looper.
The PFM-4000 Flange Machine typically has two loopers, the safety stitch looper
and the overedge looper. Always verify the condition of the looper before
mounting to the looper base. Test for burrs on the top and on the inside of the
looper. If you feel a burr on the top of the looper, use a fine-grit aluminum oxide
emery paper (for metals) and rub
very gently
to remove the burr. Do not use emery
paper on the looper’s point. To test for burrs on the inside of the looper:
1
Thread the looper.
2
Using a slight tension, slide the looper back and forth. The thread should
move smoothly.
3
Select another looper if the thread snags or frays within the eye.
In addition to the loopers, the PFM-4000 Flange Machine typically has three
needle guards. The needle guards protect the needles from the loopers while a
stitch is being formed.
