Elna SU air electronic instruction manual

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Universal Thread Tensions
The universal tensions make it possible to do most sewing jobs without having to change the tension i.e. : Lower tension

-Upper

Red number 1 facing the lever - fig. 3. tension Number 4 (white zone) under the guide mark "jI"-fig. 4.

If the tension should have to be changed (nylon or metallic threads, special sewing, etc.), it is usually the 5 upper tension that is adjusted, by turning the wheel as indicated below. Correct tension : the threads are locked properly between the two layers of material - fig. 5. Upper tension too strong : the lower thread is visible on top. Reduce the tension by turning the wheel to between 4 and 1 - fig. 6. Upper tension too weak: the upper thread is visible underneath the material. Increase the tension by turning the wheel to between 4 and 9 - fig. 7. If the tensions are tried out for a special sewing job, this should be done on a double thickness of a scrap of the material (and not a single layer), as will be the case when the actual job is sewn. If the lower tension should have to be modified (nylon, gold or silver metallic or elastic threads, hemstitching, etc.), turn the graduated screw with the screwdriver. The graduations on the screw make it easy to reset the universal tension position - fig. 3.

Straight Sewing - fig. 8
Sewing foot, straight stitch: Selector on any number, width "0", length 1-4.
This generally presents no problems whatsoever, as long as the length of the stitch is adapted to the kind of material being sewn. Sheer fabrics: fairly short stitches. Medium-weight or heavy fabrics longer stitches. Only guide the work, without holding it back or pulling it.

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Stitches too long - fig. 9
Stitch lengths between 2 and 3, for example, may tend to gather sheer fabrics. Reduce the stitch length to between 1 and 11,4 and the sewing will be perfect.

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If necessary, the foot can be raised to a higher position to enable especially thick pieces of work to be passed underneath it, Raise the cloth presser bar and keep it in its highest position. Place the work under the foot. Don't forget to lower the presser foot lever again, otherwise the sewing will not be satisfactory.

Thicknesses

fig.

10

Across Seams - fig. 11
10 11

For Sewing Thick Pleats or

Guide the work as shown in the illustration. It will slide easily under the foot. 12

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