Counter Blade On The Needle Plate And Cutting Test - Pfaff 3339 Instruction Manual

11. Counter blade on the needle blade and cutting test
17
Requirement
The clearance between the knife blade and the edge of the needle hole must be 1 mm.
Fig. 11 - 22
Adjust knife 1 (screws 2) in accordance with the requirement.
Tighten screws 2 and screw on the needle plate.
To check the cut, insert a double thread through the needle hole and activate the lifting
lever by hand. Both threads must be cut perfectly.
1
2
If this is not the case, remove the needle plate and align the knife so that the
left edge of the knife blade (seen from the front) is a little higher than the right
blade so that a scissor effect is guaranteed between the fixed and the moving
knife when the needle plate is screwed on.
1
1 mm
Adjustment
11 - 23