Knife Unit; Cutting Pressure - Pfaff 3117 Instruction Manual

Adjustment
14

Knife unit

.12
14

Cutting pressure

.12.01
14 - 22
The thread tension plate can be dismounted before making any adjustments to
the knife unit so that the parts of the unit are more accessible.
Requirement
The pressure on the knife must be as low as possible while still guaranteeing a perfect
cut.
The pressure required for a perfect cut is dependent on the material being
processed.
Fig. 14 - 21
Go to the basic position.
To do this, press the plate washer set 2 completely together by turning screw 1.
Then turn screw 1 back 3 turns.
If a clean cut is no longer possible with the buttonhole punch, despite having
been readjusted, rotate the plastic insert. See chapter 11.17 Changing the
plastic insert in the needle plate. The cutting pressure should then be
returned to the basic adjustment.
1
2