Dürkopp Adler D869 e-con Service Instructions Manual page 181

Programming
If the signal quality (1) does not display the value 1:
Test Loop control sub-item
Use this sub-item to test the functionality of the loop control.
To check the loop control:
1. Open the menu Service > Multi test > Test Loop control.
2. Turn the handwheel and complete a few stitches.
 The bobbin thread counter and the bobbin rotation counter are
Test
Bobbin thread counter
Value of the bobbin
thread counter
Bobbin rotation counter
Value of the bobbin rotation
counter
Skip stitch counter
Value of the skip stitch
counter
Degree of pollution
Service Instructions D869 e-con - 00.0 - 09/2023
• Check the position of the sensor and adjust it if necessary
• Calibrate the adjusted sensor in the menu Service > Calibra-
tion > Material thickness detection ( p. 169)
Watch the counter while doing so.
counting up.
Explanation
Counts the current loops
Total of hook thread loops
Counts the rotations of the bobbin
Total of rotations
Counts the skip stitches for which the sensor was unable
to detect a loop
Total of skip stitches
Indicates the degree of pollution. The value must be 0 on
delivery.
179