Dürkopp Adler 550-867 Operating Instruction page 108

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Setting the stitch length correction factor
Depending on the sewing material, the stitch length may not be
implemented 100% (e.g. when sewing thicker fabrics).
In this case, you can slightly increase the percentage of the stitch
length to actually achieve 100% of the entered stitch length.
To set the stitch length correction factor:
1. Open the Seam record set display ( p. 102).
2. Determine how many mm of the desired stitch length have
actually been implemented.
3. Calculate the percentage difference between the actual stitch
length and the desired stitch length.
4. Add the calculated percentage to 100%.
 This result represents the stitch length correction factor.
5. Tap the Stl. corr. fac. input field.
 An input field appears.
6. Enter the calculated stitch length correction factor.
7. Confirm with
Setting the thread tension
A thread tension tolerance range is defined for every seam section.
The machine uses the electronic monitor to regulate the thread
tension automatically and ensure that the thread tension remains
in the medium tolerance range.
To set the thread tension tolerance range:
1. Open the Seam record set display ( p. 102).
2. Tap the Thread tension min. input field.
 An input field appears.
3. Enter the desired lowest thread tension (cN).
4. Confirm with
5. Tap the Thread tension max. input field.
 An input field appears.
6. Enter the desired highest thread tension (cN).
7. Confirm with
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Operating Instructions 550-867 - 00.0 - 11/2016
Programming