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Adjustment
27
1.05.21 Modifying the needle bar stroke
The needle bar stroke is preset in the factory according to requirement. The
needle bar stroke can be modifi ed later if specifi c operating conditions make it
necessary to do so.
When the needle bar stroke is altered, it is absolutely necessary to readjust the
needle height! With a 36 mm needle bar stroke, the maximum speed must be
limited to 3800 spm.
● Via the hand wheel, turn crank 1 until the screws 2 can be accessed from the side ope-
ning of the housing.
● Turn eccentric 3 (screws 2) as far as possible toward "+" (= large needle bar stroke) or to-
ward "-" (= small needle bar stroke).
● Adjust needle height (see chapter 1.05.02 Preadjusting the needle height and /or chap-
ter 1.05.14 Needle rise, hook-to-needle clearance, needle height and bobbin case po-
sition fi nger.
Fig. 1 - 22
1
3
2
+
-