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2022-05 EN 50400685.00A.04
8.4 Optimizing Stitches
4-Thread Overlock with Integrated Safety Seam
Stitch Formation
Looper threads (red/blue) form
loops on the bottom side of fabric.
Looper threads (red/blue) form
loops on the top side of fabric.
Needle thread (yellow) forms loops
on bottom side of the fabric.
Needle thread (green) forms loops
on bottom side of the fabric.
The fabric edge forms a tunnel or
curls.
The seam puckers.
3-Thread Super Stretch
Stitch Formation
Looper thread (red) wraps fabric
edge too loosely.
Looper thread (red) wraps fabric
edge too tightly.
The fabric edge forms a tunnel or
curls.
Needle thread (yellow) forms loops
on bottom side of the fabric.
Needle thread (green) forms loops
on bottom side of the fabric.
Measures
> Reduce LL-thread tension (red).
> Increase UL-thread tension (blue).
> Reduce UL-thread tension (blue).
> Increase LL-thread tension (red).
> Reduce LL-thread tension (red).
> Increase LN-thread tension (yellow).
> Increase RN-thread tension (green).
> Reduce UL-thread tension (blue).
> Reduce LL-thread tension (red).
> Increase the mtc micro thread control.
> Reduce the cutting width CW.
> Check the rolled hem selection N/R position.
> Reduce LN-thread tension (yellow).
> Reduce RN-thread tension (green).
> Set the differential feed between 1 and 0.6 (stretching).
> Reduce the stitch length SL.
Measures
> Increase LL-thread tension (red).
> Reduce the mtc mircro thread control.
> Increase the cutting width CW.
> Reduce LL-thread tension (red).
> Increase the mtc micro thread control.
> Reduce the cutting width CW.
> Check the rolled hem selection N/R position.
> Reduce LL-thread tension (red).
> Increase the mtc micro thread control.
> Reduce the cutting width CW.
> Check the rolled hem selection N/R position.
> Reduce LL-thread tension (red).
> Increase LN-thread tension (yellow).
> Increase RN-thread tension (green).
Sewing Test
77
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