Thread Tension - Duerkopp Adler 506 Operating Instructions Manual

2.5 Thread Tension

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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.
–
Set the bobbin thread tension by turning the setting screw 4.
–
Tighten the fastening screw 3.
1
2
3
4