Innov-is F400
Vanlige spørsmål og feilsøking |
Incorrect thread tension
When the thread tension is incorrect, check the machine according the following procedure.
(1) Wrong side of fabric (2) Bobbin thread visible from right side of fabric (3) Upper thread (4) Right side of fabric (5) Bobbin thread |
The bobbin threading is incorrect.
Return the upper thread tension to the standard setting, and then refer to Upper thread tightened up to correct the threading.
(1) Wrong side of fabric (2) Upper thread (3) Right side of fabric (4) Bobbin thread (5) Upper thread visible from wrong side of fabric |
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 to correct the upper threading.
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 Combination of fabric, thread and needle to check that a needle and thread appropriate for the fabric are being used.
Adjust the upper thread tension to select an appropriate thread tension.
If the bobbin thread is visible from the right side of the fabric
(1) Wrong side of fabric (2) Bobbin thread visible from right side of fabric (3) Upper thread (4) Right side of fabric (5) Bobbin thread |
Turn the thread tension dial to the left to decrease the tension of the upper thread. (Loosen the thread tension.)
If the upper thread is visible from the wrong side of the fabric
(1) Wrong side of fabric (2) Bobbin thread visible from right side of fabric (3) Upper thread (4) Right side of fabric (5) Upper thread visible from wrong side of fabric |
Turn the thread tension dial to the right to increase the tension of the upper thread. (Tighten the thread tension.)