Pfaff 938 - Hook Timing and Clearance; Hook-to-Needle & Bobbin Case Position

Adjustment
23
Fig. 1 - 17
1.05.17 Lifting motion of the bottom feed dog
Requirement
With the stitch length set at "0" and the needle bar position at 0.25 mm past tdc (hole 3)
the bottom feed dog must be at its upper point of reversal.
● Adjust feed lifting eccentric 1 (screw 2) in accordance with the requirement.
An axial displacement of feed lifting eccentric 1 is not allowed.
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2