Bedienungsanleitung Brother Innov-is 1250D (Seite 191 von 212) (Englisch)

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Incorrect thread tension

■ Symptoms

• Symptom 1: The lower thread is visible from the upper side of the fabric.

• Symptom 2: The upper thread appears as a straight line on the upper side of the fabric.

• Symptom 3: The upper thread is visible from the lower side of the fabric.

• Symptom 4: The lower thread appears as a straight line on the lower side of the fabric.

• Symptom 5: The stitching on the lower side of the fabric is loose or has slack.

■ Cause/remedy/check details

 Cause 1

The machine is not correctly threaded.

The bobbin threading is incorrect.

Return the upper thread tension to the standard

setting, and then refer to “Upper thread tightened

up” (page 186) to correct the threading.

The upper threading is incorrect.

Return the upper thread tension to the standard

setting, and then refer to “Tangled thread on

wrong side of fabric” (page 187) to correct the

upper threading.

 Cause 2

A needle and thread appropriate for the fabric

are not being used.

The sewing machine needle that should be used

depends on the type of fabric sewn and the thread

thickness.

If a needle and thread appropriate for the fabric

are not being used, the thread tension will not be

adjusted correctly, causing wrinkles in the fabric

or skipped stitches.

• Refer to “Needle types and their uses” (page

41) to check that a needle and thread

appropriate for the fabric are being used.

 Cause 3

An appropriate setting on the thread tension dial

is not selected.

The setting selected for the upper thread tension

is not appropriate.

Refer to “Adjusting the thread tension” (page 59)

to select an appropriate thread tension.

The appropriate thread tension differs depending

on the type of fabric and thread being used.

* Adjust the thread tension while test sewing

on a piece of scrap fabric that is the same as

that used in your project.

Note

z If the upper threading and bobbin threading

are incorrect, the thread tension cannot be

adjusted correctly. Check the upper

threading and bobbin threading first, and

then adjust the thread tension.

• If the bobbin thread is visible from the right

side of the fabric

Press in the operation panel to decrease

the tension of the upper thread.

• If the upper thread is visible from the wrong

side of the fabric

Press in the operation panel to increase

the tension of the upper thread.

 Symptom 1  Symptom 3

a Lower side of fabric

b Lower thread visible from

upper side of fabric

c Upper thread

d Upper side of fabric

e Lower thread

f Upper thread visible from

lower side of fabric

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