Hello Nilda,
Thread the machine as normal, presser foot up, open the slide plate and pop a bobbin in, push the little lever to the right, thatb will raise the winder, wind the thread round the screw on the presser foot, make sure yoiu have straight stitch, press on the foot control slowly and it will wind the bobbin, when you have wound enough drop the winder down by closing the slide plate and pull the threads to the back of the machine.
Ken
drivewithken@blueyonder.co.uk, September 2008