Pfaff 645F Owner's Manual - Page 44

ed once tly and ntinual en used ore you sewing points iot gi•ve ich will fabric. w rows alto be • Also top of rication s been PROBLEMS - and PROBABLE CAUSES In most cases, poor sewing results are due to a damaged needle. Always examine needle first before checking other items. 1. SKIPPING STITCHES • bent or blunt needle • wrong size needle • needle inserted incorrectly • upper thread tension too tight • pressure on presser foot too light 2. UNEVEN STITCHES • bent or blunt needle • wrong size needle • incorrect threading • pulling fabric while sewing • upper thread tension too loose • pressure on presser foot too light • loose presser foot • bobbin wound unevenly • bobbin inserted incorrectly in case * 3. NEEDLE BREAKS • bent needle touches needle plate or presser foot • needle inserted incorrectly • pulling fabric while sewing • loose presser foot touches needle • needle too fine for fabric turning stitch pattern dial or needle position dial with needle in fabric 4. UPPER THREAD BREAKS • bent or blunt needle • incorrect threading • upper tension too tight • needle inserted incorrectly • needle touches presser foot • needle eye has sharp edges • poor quality thread • knots in thread • starting to stitch too fast 42 - -