My
BERNINA
18
B E R N I N A O V E R L O C K E R W O R K B O O K
TENSION SETTINGS: LEFT NEEDLE THREAD TENSIONS
1.
Adjust the left needle tension to the highest setting of 9.
2.
Fold the fabric in half to 5" x 10” and sew the seam along the
fold, trimming off a slight amount.
3.
Look at the stitch. You may see some of the red thread showing
up on the front side of the seam, but also the stitch will appear
to “tunnel” or scrunch up more when sewing.
4.
Label the sample "Left Needle Tension Too Tight".
1.
Now adjust the tension setting to the lowest setting of 1 and
sew the seam on the opposite side.
2.
Examine the stitch formation. You will notice that on
the back of the seam you will see the yellow thread
being pulled by the loopers.
3.
Label the sample "Left Needle Too Loose".
4.
Touch clr to put the left needle tension setting back to
the default of 4.
Left Needle Tension Too Tight
Left Needle Tension Too Tight
Left Needle Tension Too Loose
Left Needle Tension Too Loose
Top Side
Bottom
Side
Bottom
Side
Top Side
Firm fabric such as muslin, 10" x 10"
80/12 ELX705
4 Spools Serger Thread (B, R, G, Y)
4-Thread Overlock Stitch #1
C 11
Compare your sewn samples to the images in the Stitch
Optimizer and consider the recommended corrective
measure for each issue.
