22
Adjustment
15 Knife pressure
Requirement
When half of front edge of catcher 3 has passed the knife cutting edge, knife 4 should
contact the edge of the thread catcher with light pressure.
● Loosen screws 1 slightly.
● Turn balance wheel to set needle bar 10 mm before b.d.c.
● Operate engaging lever 2.
● Turn balance wheel until half of front edge of catcher 3 has passed cutting edge of knife 4.
● Maintain position and adjust position of knife 4 according to the requirement.
● In this position, tighten screws 1.
● For a cutting test, turn balance wheel to set catcher 3 at forward point of reversal.
● Place two threads into thread catcher hook and turn balance wheel until catcher 3 returns
to starting position.
● Increase knife pressure, if necessary.
● Check this adjustment according to the requirement.
● On two-needle machines, make adjustment twice.
4
3
-900/56
1
3
4
-900/61
1
2
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