Setting The Synchronizer - Pfaff Coverlock 4872 Service Manual

29. Setting the synchronizer

Requirement:
If the foot control is released, the needle bar must stop at its highest position and the upper overedge loo-
per must have a clearance of 3.0 - 5.0 mm to the needle "R2" (fig. 66).
Check:
G Switch on the machine.
G Press the foot control for a short period of time.
G Release the foot control.
G Carry out a visual check.
Setting:
G Remove the stand cover as described in the adjustment and repair instructions.
G Press the foot control for a short period of time.
G Release the foot control.
G Turn the hand wheel in the normal direction and set the clearance of 3.0 - 5.0 mm between the needle
"R2" and the upper overedge looper.
G Loosen the fastening screw 39 (fig. 66).
G Set the washer 40 as shown in fig. 66.
G Tighten the fastening screw slightly.
G Check the setting of the needle bar and the upper overedge looper.
G Keep repeating this procedure until the setting is correct (as seen in fig. 66).
G Tighten the fastening screw 39.
Test:
G As described under "Requirement".
G Mount the stand cover as described in the adjustment and repair instructions.
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