5.3 Lower thread
Look out! Danger of injury!
Turn off main switch!
The lower thread may only be threaded with the sewing
machine switched off.
Threading the low er thread (hook thread)
–
Place the thread spool on its column.
–
Pass the lower thread through the thread guide on the take-up arm and alternately
through the guide of the pre-tensioner 1.
–
Pass the thread anti-clockwise round tensioner 1 and once more through the thread
guide.
–
Carefully wind a few turns of thread anti-clockwise onto the spool by hand and
place 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 low er 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 the
opposite 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 low er-thread tension
The 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 of
the material
Fig. b: needle-thread tension too low
or looper-thread tension too great
Fig. c: needle-thread tension too great
or looper-thread tension too low
13
GB
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