Modifying The Needle Bar Stroke - Pfaff 1051 Instruction Manual

Adjustment
11

Modifying the needle bar stroke

.05.21
The needle bar stroke is preset in the factory according to requirement. The
needle bar stroke can be modified later if specific operating conditions make it
necessary to do so.
2
Fig. 11 - 22
When the needle-bar stroke has been changed, it is imperative to adjust the
needle height! Also, the max. sewing speed must be limited to 3,800 s.p.m.
Via the hand wheel, turn crank 1 until the screws 2 can be accessed from the side
opening of the housing.
Turn eccentric 3 (screws 2) as far as possible toward "+" (= large needle bar stroke) or
toward "-" (= small needle bar stroke).
Adjust needle height (see chapter 11.05.02 Preadjusting the needle height and/or
chapter 11.05.14 Needle rise, hook-to-needle clearance, needle height and bobbin
case position finger).
3
1
+
-
11 - 23