Dürkopp Adler 550-D800 Operating Instructions Manual page 185

Programming
Fig. 174: Creating a teach-in file (2)
(1) - Thread tension scale
9. Use a thread tension scale (1) to check the needle thread tension.
10. Disassemble the scanner (2).
11. Assemble the thread tension scale (1).
12. Secure the machine in the looping stroke position.
13. Thread the needle thread and feed it from the thread lever to the thread
14. Pull off the needle thread horizontally and evenly to measure the thread
15. Adjust the percentage of the needle thread tension (Position step
16. Press the T.Tens.Target Point. button again to allow the stepper motor
17. Lift the sewing foot once.
18. Press the T.Tens.below Target button.
 The value of the needle thread tension is adopted.
19. Use a thread tension scale (1) to check the needle thread tension.
20. Adjust the percentage of the needle thread tension (Position step
Important
The percentage must not be smaller than 5 percent relative to the operat-
ing point. If a difference of 5 percent is not enough to reach the setpoint,
the setpoint must be adjusted based on the measured value.
Operating Instructions 550-D800 - 01.0 - 05/2023
①
②
tension scale (1).
tension.
motor) until the measured value matches the setpoint:
• lower value: lower needle thread tension
• higher value: higher needle thread tension
to set the specified value.
motor) until the measured value matches the setpoint:
• lower value: lower needle thread tension
• higher value: higher needle thread tension
(2) - Scanner
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