Programming
366 Service Instructions 755 A/756 A - 00.0 - 02/2019
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. 336: Setting and testing hook thread monitor
To set the hook thread monitor:
1. Press the desired button.
Symbols Meaning
Set sensitivity left
•0 - 15
Set sensitivity right
•0 - 15
To Next Page
Loading...
Need help?
General
