Strobel 441-1, Mechanic'S Instructions

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MA_441-1-2_A1_180830_en
4.8
The lifter bar (4) for the tread lifting in the needle bar head has to be set so that
the thread can be lifted when the looper stands vertically over the needle as the
needle retracts and the loop pick-up is done up to the moment when the looper
has reached the needle centre with the left looper point as the needle
advances. (
Tread lifting in the needle bar head
Fig. 4)
The thread breaking at the needle bar is 0.35 - 0.4 N.
4.9
The tension of the spring (1) needs to be adjusted to the material to be
processed; for shoes it can be up to 200 N for example. The spring tension can
be set using the setting screw (2). (
Spring tension at the plate bearing arm
Fig. 12)
Fig. 12
4.9.1
The plate arm lifting is about 12 - 14 mm and can be adjusted using the lever
(3). (
Plate arm lifting
Fig. 12)