Setting The Needle Thread Tension; Setting The Hook Thread Tension - Duerkopp Adler 669 Premium Operating Instruction

Operation
Operating Instructions 669 PREMIUM - 00.0 - 11/2016
4.8.1

Setting the needle thread tension

The needle thread tension can only be set using the software
of the OP3000; for detailed information, refer to the chapter
Programming ( p. 45).
4.8.2

Setting the hook thread tension

WARNING
Risk of injury from needle tip and moving parts!
Puncture, cutting and crushing possible.
Switch off the machine before setting the hook
thread tension.
Fig. 14: Setting the hook thread tension (1)
Proper setting
The hook thread tension must be set so that the resulting seam
pattern is uniform.
The basic setting for the tension spring is performed as follows:
• When the bobbin case contains a full bobbin it must sink
slowly under its own weight.
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