Setting The Looper-To-Needle Clearance - Pfaff Coverlock 4872 Service Manual

12. Setting the looper-to-needle clearance

Requirement:
When the looper point is in the scarf of the needle while moving to the right, the looper-to-needle clearan-
ce must be 0 - 0.05 mm (fig. 23).
Note:
A new needle system ELx705 Nm 90 must be used for the following steps.
Check:
G Remove the presser foot and the needle plate.
G Slightly loosen both fastening screws 3 and push the needle guard 4 slightly toward the rear.
G Turn the handwheel in the normal direction until the looper point is exactly in the scarf of the needle,
while moving to the right.
G Check the clearance between the point of the looper and the needle.
Setting:
G Turn the handwheel in the normal direction until the looper point, when moving to the right, is positio-
ned exactly in the scarf of the needle "R1".
G Loosen the screw 5 on the looper lever 6.
G Set the looper-to-needle clearance by moving the looper lever 6.
G Tighten screw 5.
Test:
G As described under "Requirement".
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