Pfaff 3538-20/02, Adjustment Manual, Page: 14 / 40

Adjustment
14
13
.05.10
Readjusting hook position to sewing direction / hook eccentric
Rule
When the needle bar is positioned 4 . 2 mm after b.d.c. and stitch length regulation is
4 . 5 mm , the hook point should be at the needle midpoint.
Fig. 13 - 10
Adjusting the maximum stitch length
O
Move the needle bar to a position 4 . 2 mm after b.d.c. by turning the handwheel.
O
Secure the c-clamp to the needle bar in this position so that the upward movement of
the needle bar is blocked.
O
Adjust the bracket 1 (screw 2 ) according to the rule .
Checking the hook driving eccentric
O
Turn the handwheel against the direction of rotation until the c-clamp lays fl at again.
O
Measure the clearance between the hook point and the edge of the needle - the clear-
ance should be
3 . 3 mm .
O
In the event that this differs, turn the handwheel in the direction of rotation until the c-
clamp lays fl at again and make the following adjustment:
O
Measured value is larger than 3 . 3 mm , turn the eccentric 3 (screw 4 ) so that the hook
moves to the left by half the value of the measured difference.
O
Measured value is smaller than 3 . 3 mm , turn the eccentric 3 (screw 4 ) so that the hook
moves to the right by half the value of the measured difference.
O
Restore the setting indicated in the rule after a correction has been made to the eccen-
tric 3 .
Maintain stitch length regulation for the next setting.
1
2
4
3