Dürkopp Adler 767 Operating Instructions Manual

Also see for 767 -: Instructions Instructions Instructions Installation instructions

5.3 Lower threadLook out! Danger of injury!Turn off main switch!The lower thread may only be threaded with the sewingmachine switched off.Threading the lower thread (hook thread)– Place the thread spool on its column.– Pass the lower thread through the thread guide on the take-up arm and alternatelythrough the guide of the pre-tensioner 1.– Pass the thread anti-clockwise round tensioner 1 and once more through the threadguide.– Carefully wind a few turns of thread anti-clockwise onto the spool by hand andplace the spool on its column.– Swivel the bobbin winder 4 against the empty spool.The thread is wound onto the spool during sewing.When spool 3 is full, winding-on is halted by the bobbin-winder lever 4.– Adjusting tension 1.The thread should be wound on at minimum tension.Threading the lower thread– Raise flap 5 and remove the empty spool with a magnet or tweezers.– Insert spool 6 in such a way that when the thread is unwound from it moves in theopposite direction to the hook.– Pass the thread through slit 7 and below spring 10.– Pass the thread through slit 8 and pull about 3 cm through.– Close flap 5 and pass the thread through the flap’s guide 9.Adjusting the lower-thread tensionThe lower-thread tension should be set in accordance with the type of seam required.Adjust the tension with screw 11.Fig. a: correct thread interlacing in the centre ofthe materialFig. b: needle-thread tension too lowor looper-thread tension too greatFig. c: needle-thread tension too greator looper-thread tension too low13GB