Needle Rise, Hook-To-Needle Clearance And Bobbin Case Positioning-Fi Nger - Pfaff 939 U Adjustment Manual

Justierung
1 Needle rise, hook-to-needle clearance and bobbin case positioning-fi nger
.05.34
● Adjust the hook 1 (screw 2) in accordance with requirement 1.
● Fit the bobbin case positioning-fi nger 3 in accordance with requirement 2.
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Requirement
1. With the needle position set at "middle", the zigzag stitch setting at "0" and the needle
bar position 2.0 past bdc (hole 1) the hook point must be in the middle of the needle and
the distance between the needle and the hook point must be 0.05 - 0.1 mm.
2. The bobbin case positioning-fi nger 3 must be fi tted so that there is a clearance of 0.5 mm
between the bottom section of the bobbin case and the front edge of the bobbin case
positioning-fi nger (see arrow).
0,5 mm
0,05 -0,1 mm
Fig. 1 - 35
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1
2
4
3
1
2
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