Pfaff 6250 Owner's Manual - Page 25
Iris3rt, opening, Check, thread, clockwise., Checking, bobbin, tension, downwards, Correcting,
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lnsertinj the bobbin Iris(3rt tli( lull Inibtun iii ii l,ll,ir When doing 50, pull tire tIm il ririi ,iul A, ther iri(1(r tt'risrcnr iriii(j b 11ri ii i"t' iii opening (see arrow) Check: When you pull tho thread the clockwise. lrln niust turn Checking the bobbin thread tension Hold the bobbin case by the thread and move your hand sharply upwards. The uobbn case must slip downwards a little with eucti baud movement. it Correcting the tension: Turn adjusting screw C just a little to the left to decrease the bobbin thread tension. Turn screw C just a little to the right to increase thu tension. Inserting the bobbin case Lift cover F and push the bobbin cac fully oiili pu of the sewing hook Opening E of the bobbin Ce must face upwards. Check: Pull the bobbin threud sharply, the bobbin can not fall out of the hook.