Duerkopp Adler 506 Betriebsanleitung - Seite 12

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2.5 Thread Tension

Set the thread tensions appropriate to the yarn types and

thicknesses used so that a clean seam formation results.

Too high thread tensions cause a crimping of the sewing material. Too

low a bobbin thread tension can lead to missing stitches.

Setting the needle thread tension

–

Set the upper needle thread tension by turning the knurled screw 1

and the lower needle thread tension by turning the knurled screw 2.

Setting the bobbin thread tension

–

Loosen the fastening screw 3.

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Set the bobbin thread tension by turning the setting screw 4.

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Tighten the fastening screw 3.