Bernina 1150MDA User Manual download pdf (Page 7)

Adjusting Tension Settings

Examine your 4-thread sample. The illustrations below show examples of unbalanced stitches and how

to correct the settings to balance the stitch. When making corrections in the tension settings, increase or

decrease the settings as needed, moving the dial ½ to 1 number at a time. Stitch a seam using the new

settings and then evaluate the new stitch. Continue in this manner until the stitch is balanced.

Upper and Lower Loopers - Tight Tension

Unbalanced: The looper threads “bite” into the edge of the fabric and/or the seam

allowance is folded or “scrunched” in the stitch.

Correction: Decrease (lower number) one or both looper tensions until the seam

allowance is flat and loopers meet at the edge. Note: This problem might also

result from an incorrect cutting width setting; see page 9 for more information.

Upper Looper - Loose Tension

Unbalanced: The looper threads are not at the edge of the fabric. Upper looper

thread is visible on the back of the fabric and the looper threads are very loose.

Correction: Make sure the thread is seated in the tension guides. If it is, tighten

the upper looper thread (higher number).

Lower Looper - Loose Tension

Unbalanced: The looper thread does not lock on the edge of the fabric and is

visible on the face of the fabric and the looper threads are very loose.

Correction: Make sure the thread is seated in the tension guides. If it is, tighten

the lower looper thread (higher number).

Left Needle - Loose Tension

Unbalanced: The yellow needle thread forms loops on the underside of the fabric.

The seam is not secure and the yellow thread may show in the seam line.

Correction: Make sure the yellow thread is seated in the tension guide. If it is,

tighten the left needle thread (higher number).

Right Needle - Loose Tension

Unbalanced: The green needle thread forms loops on the underside of the fabric.

Correction: Make sure the green thread is seated in the tension guide. If it is, tighten

the right needle thread (higher number).

Right and Left Needles - Tight Tension

Unbalanced: The green and yellow needle threads are pulled snugly, causing puck-

ers in the fabric at the seam line.

Correction: Make sure the threads are seated in the tension guides or have not

double wrapped around a threading guide. If they are, unwrap or loosen appropriate

needle tension (lower number).

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Bernina 1150MDA User Manual Page 7