Pfaff 3811-3/55 Instruction Manual page 88

Adjustment
13 Setting the basic stitch length (not for PFAFF 3811-3/55)
.06.20
 Set stitch length "3" (lever 1)
 Switch the machine on and press button "15" on the keypad.
 Turn crank 2 (screw 3) according to the rule.
88
Rule
With stitch length regulation "and activated button "15" (cylinder 4 completely extended)
the stitch length should be 3 mm.
2
4
Fig. 13 - 20
3
1