Duerkopp Adler 550-16-26 Manuel d'utilisation - Page 10

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Duerkopp Adler 550-16-26 Manuel d'utilisation

4.7 Setting the Hook Thread Tension

Caution Risk of Injury!

Turn the main switch off .

Set the hook thread tension only with the machine turned off.

Half of the necessary hook thread tension should be created by the

brake spring 8 and halb by the tension spring 5.

Setting the tension spring

–

The bobbin case top 3 should slowly lower under is own weight

(see right illustration).

–

Set the tension spring 5 at the adjusting screw 10 until the

necessary tension value is reached.

Note:

The hook thread tension should amount to 20 +/- 5 grams.