Hello Wyn,
Start at the beginning, thread the machine and make sure the presser foot is up, top tension about 4 or 5, bobbin turning anti clockwise in the bobbin case, pull the thread through the bobbin case so there is slight resistence, if it is too tight turn the screrw on the bobbin case anti clockwise about a quarter of a turn at a time and test sew.
drivewithken
August 2010