Brother 681B-UG 사용자 설명서 - 페이지 36

{카테고리_이름} Brother 681B-UG에 대한 사용자 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Brother 681B-UG 39 페이지.

Check List for Better Sewing

Check this list if you are having the following problems:

IF MATERIAL IS NOT FED

1. Feed dog is down .

2. Stop motion knob is loose.

3. Stitch length regulator is at 0.

IF NEEDLE BREAKS

1. Needle is inserted incorrectly.

2. Needle clamp screw is loose.

3. Bent needle is used.

4. Upper threading is not correct.

5. Upper thread tension is too tight.

6. Wrong needle and thread for cloth being

sewn are used.

7. Material pulled excessively.

IF LOOPS FORM ON FABRIC

1. Tension of upper or lower thread is

wrong.

IF MATERIAL SHOULD PUCKER

1. Thread tension is too tight.

2. Threading is not correct.

3. Thread is caught by something.

4. Lower thread is unevenly wound on

bobbin.

IF UPPER THREAD BREAKS

1. Upper threading is not correct.

2. Upper thread is too large for needle eye.

3. Upper thread tension is too tight.

4. Needle is inserted incorrectly.

IF LOWER THREADS BREAKS

1. Lower thread is entangled in shuttle.

2. Lower thread tension is too tight.

3. Lower threading is not correct.

IF MACHINE SKIPS STITCHES

1. Needle is not sharp and straight.

2. Needle is inserted incorrectly.

3. Wrong needle and thread for cloth being

sewn are used.

4. Upper threading is not correct.

Lint is clinging to under-side of needle

plate.

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