Brother bas-311hn - Thread Breakage Sensor Adjustment

7. STANDARD ADJUSTMENTS
BAS-311HN, BAS-326H
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7-2. Adjusting the sensitivity of the thread breakage sensor
1. Open the cover (1) and remove the upper thread from
the photo sensor (2).
2. Turn the control (3) to the right <a> until the LED (4)
illuminates.
3. Turn the control (3) to the left <b> until the LED (4)
switches off.
4. Place the upper thread into the photo sensor (2), and
close the cover (1).
NOTE:
• Thread breakages may be difficult to detect depending on
the thickness of the thread and the type of material being
sewn. In such cases, turn the control (3) to adjust the
sensitivity, or change the number of stitches for judgment
of an upper thread breakage.
* Contact the place of purchase for information on
changing the number of stitches for judgment of an
upper thread breakage.
• If foreign objects get into the photo sensor (2), it will not
be possible to detect thread breakages. Clean inside the
photo sensor (2) to keep it free from dust and other
foreign particles.
• If applying silicone to the thread, apply the silicone
between the thread breakage detector and the thread
take-up. If silicone is applied to the thread before it passes
through the photo sensor (2), the sensor window inside
the photo sensor (2) will become dirty and it will not be
possible to detect thread breakages.
3577B