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The drive eccentric 5 for the ellipsoidal movement of the two thread chainstitch looper must be set so
that the two thread chainstitch looper 16 is in the middle of the needles "C" and "D" (fig. 2a).
Thus the screws of the drive eccentric are to be loosened.
The drive eccentric must be set in accordance with fig. 2a and the screws must be retightened.
Note:
The drive eccentric 6 for the two thread chainstitch looper is also in the basic position.
Requirement 3:
When the two thread chainstitch looper 16 is at the left point of reversal, the driving fork 7 of the lower
overedge looper is vertically facing upward (figure 3).
To this end, slightly loosen the fastening screw 8 of the driving crank 9.
Turn the rock shaft 10 out of position, until the driving fork 7 is vertically facing upward (figure 4).
Tighten the fastening screw 8.
There most also be a clearence of approx. 1.5 mm between the driving fork 7 and the driving crank 9,
when the driving crank is at the right point of reversal.
To this end, slightly loosen the screws 11 of the driving fork 7 (figure 3).
Move the driving fork 7 until there is a clearance of 1.5 mm.
Tighten the screws 11.
12
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