Pfaff coverlock 4872

47
22. Setting the needle guard for the cover stitch needles
Requirement:
When the looper point of the two thread chainstitch looper 13 is exactly at the needle center line of either
the needle “L0” or “L2” when moving to the left, the needle should have a clearance of 0 - 0.05 mm to the
front needle guard 20 (fig. 40).
Check:
● Turn the handwheel in the normal direction until the looper point of the two thread chainstitch looper
13 is precisely in the middle of the needle center line of either the needle “L0” or “L2”.
● Carry out a visual check.
Setting:
● Slightly loosen the fastening screw 21 (fig. 41).
● Push the front needle guard 20 until there is a clearance of 1.0 mm between the two thread chain-
stitch looper 13 and the front needle guard 20.
● Tighten the fastening screw 21.
● Turn the adjusting screw 22 until the clearance of 0 - 0.05 mm is set, as seen in figure 40.
Test:
● As described under “Requirement”.