Bernina E 16 PRO User Manual page 72

Satin stitches - Not enough bobbin is showing on the back of the design.
·
Fill stitches - You are encountering thread breaks, and the stitches in the design are looping.
·
False Bobbin Breaks - When the software falsely detects bobbin breaks that are not truly broken
·
thread, it could be that your material thickness is too high.
Advanced Acti-Feed Calibration
Acti-Feed behavior is based on the play of the thread through the system and against the sensor. One of the
key factors is the bobbin tension. If your desired tension is different than that called out in
Threading & Tensioning section,
adjusted to suit your needs or the needs of your embroidery application.
the Advanced Acti-Feed Calibration section shows how Acti-feed can be
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the Bobbin