Strobel 4 - Page 18

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3.2.3
Stitch width is the distance between left and right hand needle penetration
(needle oscillation).
Setting the stitch width (Fig. 6)
Standard stitch width setting is 1.2 mm. By moving the adjusting ring (1) on the
bolt (2) stitch width is adjusted.
Move to left → stitch width is small
Move to the right → stitch width is greater
Fig. 6
3.3
Loop stroke is the needle course from its lowest position to the point where the
looper point stands above the needle centre.
Loop stroke
3.3.1 Setting the loop stroke (Fig. 5)
ATTENTION!
Switch off machine electrically!
In the factory a loop stroke of 2.5 mm at the left hand needle penetration is set,
i.e. the distance from the looper point to the end of the thread eye is
1 ±0.2 mm.
If materials or threads are sure where - due to their structure – the loop is too
small or too large, reset the loop stroke as follows:
1. Loosen both screws in gearwheel (4)
2. Turn endless screw (5) at the back side of the head to the right or to the
left until the required loop stroke is obtained
3. Retighten both screws and make sure that the shaft has no axial play
4. Turn machine manually and check the new settings