Setting The Front Needle Guard - Pfaff Coverlock 4772 Service Manual

24. Setting the front needle guard

Requirement:
When the looper point of the lower overedge looper 4 is precisely in the center line of the needle when
moving to the right, then a clearance of between 0 and 0.05 mm must be apparent between the left and
right needles and the front needle guard 23 (figure 43).
Check:
G Turn the handwheel in the normal direction until the looper point of the lower overedge looper 4,
is precisely behind the center line of the needle.
G Carry out a visual check.
Setting:
G Turn the handwheel in the normal direction until the looper point of the lower overedge looper 4,
is precisely behind the center line of the needle.
G Turn the screw 24 (figure 44) thus moving the needle guard until a minimum clearance is
set between the needle guard and the needle of 0 - 0.05 mm.
Test:
G As described under "Requirement".
Note:
G Following correct setting, the screw 24 should be secured with glue.
43