Pfaff coverlock 4772

2. Setting the needle penetration points
Requirement:
When the needles are located in the lower dead center, the needle penetration points 4 must be cente-
red in the needle plate with a clearance of 1 mm to the front of the needle plate (figure 3).
Check:
● Turn the handwheel in the normal direction until the needle bar is at its lower dead center.
● Carry out a visual check.
Setting:
●Turn the handwheel in the normal direction until the needle bar is at its lower dead center.
● Slightly loosen the fastening screw 5.
● Turn the adjustment eccentric 6 until the needles are centered with a clearance of 1 mm to the front.
● Tighten the fastening screw 5.
Test:
● As described in “Requirement”.
Note:
Should the clearance of the two thread chainstitch needle from the needle plate be slightly off centre,
the needle holder 2 can be turned slightly (figure 1).
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