Pfaff 1246 - Manual (Page 52)

Adjustment
11 - 12
11. 04.10 Lifting motion of the top feed
Requirement
When presser foot
1 is resting on the needle plate, the vibrating presser foot 4 and the
point of the needle must both reach the needle plate at the same time when the top feed
stroke is set at maximum.
Fig. 11 - 10
2 3
1
4
● Allow presser foot 1 to rest on the needle plate.
● Loosen screws 2 until feed lifting eccentric 3 can be turned on its shaft with difficulty.
● Turn feed lifting eccentric 3 in accordance with the requirement.
● Tighten screws 2.
● Carry out a check in accordance with the requirement.