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Setting and testing hook thread monitor
The display switches to Test bobbin thread monitor.
Information
When the light barriers are correctly aligned, a reflection occurs when an
empty bobbin is turned.
The intensity of the reflection is illustrated by a black bar and a number
between 1 and 15.
If the value is above the minimum value of 8, the display shows an arrow
between reflecting head and hook thread bobbin. A signal tone will sound
at the same time.
Important
If the light barrier setting is correct, the maximum value of 15 must be
reached when the infrared beam hits the area of the reflecting surface of
the bobbin.
The black bar is within the green range.
Fig. 100: Set and test hook thread monitor
Symbols
To set the hook thread monitor:
1. Press the desired button.
132
Meaning
Set sensitivity left
• 0 - 15
Set sensitivity right
• 0 - 15
Operating Instructions 745-35-10 D - 00.0 - 04/2017
Programming
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