Duerkopp Adler 550-767 Operating Instructions Manual page 45

"SM-Kali" and "ELTEX-Kali" fields
If the component "Calibration check" is activated in the set-up, the user
will be asked at certain times to check and possibly calibrate the
settings for the step motor and the ELTEX-thread-tension measuring
device.
Both activities will be recorded in the ELTEX and the step-motor
calibration database.
See section 6.5: Needle-thread tension tolerance range.
"SM" field
After activating the function, the adjustment of the stitch length can be
calibrated and verified.
–
Press the "Min." field.
The step motor moves to the shortest stitch length.
–
Press "Enter 100 stitches+length" field.
The following window is displayed.
–
Sew test seam.
100 stitches will be sewn.
–
Measure stretch.
–
Enter the value for the measured stretch, then press the field "8" to
confirm.
1
43