Remaining Thread Monitor - Duerkopp Adler 743-221 Operating Instructions Manual

2.9 Remaining Thread Monitor

1
The remaining thread monitor monitors the thread reserve on the the
underthread bobbin with the infrared reflecting light barrier 1.
Function
–
After a certain number of seams the underthread reserve on the
bobbin is used up.
–
The light beam transmitted from light barrier 1 is reflected by the
exposed reflecting surface 2 on the bobbin hub.
–
The display of the controls shows the message " Bobbin Empty ".
–
The seam is securely ended with the thread reserve found in the
reserve groove.
Caution Risk of Injury !
Turn the main switch off.
Change the underthread bobbin only with the sewing unit turned off.
–
Turn the main switch off.
–
Change the bobbin.
–
At every bobbin change clean the lenses of the light barrier with a
soft cloth.
–
Turn the main switch on.
–
Start a new sewing sequence.
2 3
13