Pfaff 438 Series User Manual

19.1.4 Turn the eccentric bushing until there is clearance of abt. 0.5 mm between the top
of the bobbin case opener finger and the inner edge of the bobbin case base
(Fig. 19.0.2).
.5 Adjust the bushing in height without turning it until there is a clearance of abt.
0.8 mm between bobbin case opener finger and the edge of the bobbin case base
(Fig. 19.0.3).
.6 In this position, tighten alien screw 4.
.7 Turn the balance wheel to bring the bobbin case opener to its left point of reversal.
.8 Turn the opener finger on its shaft, making sure it still contacts the bobbin case
base, until there is a clearance of abt. 0.3 mm between the right side of the bobbin
case slot and the bobbin case position finger (Fig. 19.0.4).
.9 In this position tighten
clamp screw 3, making sure the bobbin case opener still contacts
clamp crank 2 underneath.
.10 Check this adjustment (see "Setting").
o
19.0.2
19.0.3
19.0.4
19.0.1
30
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

Pfaff 438 Series Specifications

General

Brand	Pfaff
Model	438 Series
Category	Sewing Machine
Language	English