Pfaff coverlock 4872

15. Setting the timing of the upper overedge looper
Requirement:
When the two loopers overlap, as shown in figure 26, the clearance between the point of the upper looper
10 and the head of the lower looper 2 must be between 0.5 and 1.0 mm.
Check:
● Turn the handwheel in the normal direction until the upper looper 10, in its upward movement, is
behind the lower looper 2.
● Check that the clearance between the point of the upper looper 10 and the head of the lower looper 2
is between 0.5 and 1.0 mm.
Setting:
● Turn the handwheel in the normal direction until the upper looper 10, in its upward movement, is
behind the lower looper 2.
● Loosen the screws 11 on the drive eccentric 4 (fig. 27).
● Rotate the drive eccentric until the clearance between the point of the upper looper 10 and the head
of the lower looper 2 is between 0.5 and 1.0 mm (figure 26).
● Tighten the screws 11 of the drive eccentric (fig. 27).
Test:
● As described under “Requirement”.
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