Pfaff 3811-2/45 Instruction Manual page 32

.1 Set the stitch length at 4 mm.
.2 Attach connecting rod 4 (fig. 5).
.3 Set the control cam 8 (fig. 8) at position "0" (turn the cam carrier 6 on its shaft).
Note: The actuating lever 10 must have a little bit of play when the control cam is set at "0";
(see arrow in fig. 8).
.4 Basic position of the top feed driving eccentric 11:
When the needle bar is 0.8 mm below the t.d.c. (adjustment hole "4"; fig. 9) the slot in the top feed
driving eccentric 8 (arrow in fig. 8) must point to the operator (screws 12).
.5 While continually turning the handwheel and observing the lateral movement of the top feed and the
bottom feed dog, adapt the lateral movement of the top feed to equal that of the bottom feed dogs by
turning the top feed driving eccentric 11 (screws 12).
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- stitch length 4 mm
- cam setting "0"
- connecting rod 4 (fig. 5) attached
the top feed 5 (fig. 6) and the bottom feed dogs 6 (see chapter 17) must make
the same motion when the handwheel is turned.