Bernina Activa 210 User Guide - Page 33

Trouble shooting Trouble shooting 33 In most cases you will be able to identify and remedy faults by checking the following. Check whether: • the upper and lower threads are threaded correctly • the needle is inserted correctly • the needle size is correct - check the needle/thread table p. 29 • the sewing computer is clean - brush out any thread fluff • the hook race is clean • any threads are trapped between the tension discs or under the bobbin case spring • the bobbin runs smoothly in the case or if remnants or lint need removing Lower thread breaks • The lower thread tension is too tight. • The bobbin is jamming in the bobbin case. Remove and replace the bobbin. • The hole in the stitch plate has been damaged by the needle. This must be repolished by an expert. • The needle is blunt or bent. Upper thread breaks • The upper thread tension is too tight. • The needles are of a poor quality. Ideally needles should be purchased from your BERNINA dealer. • The needle is bent or blunt. • Poor quality, knotted or dried out thread has been used. • Use the correct spool disc. • Stitch plate or hook tip damaged. Take your sewing computer to your BERNINA dealer. Skipped stitches • Wrong needles used. Use only 130/705H system. • The needle is blunt, bent or incorrectly inserted. • Push right to the top when inserting. • Needle inserted all the way to the top. • The needle point does not suit the fabric being sewn. If necessary use a ball point for knitted fabrics and cutting point for hard leather. Faulty stitching • Remnants of thread between the tension discs. • Remnants of thread under the bobbin case spring. • Lower thread still threaded in the bobbin case finger. • Sewing computer threaded with foot down. • Incorrect threading. Check upper and lower threads. • Use the correct spool disc. Needle breaks • Needle clamp screw loose. • Fabric taken out in front instead of behind presser foot. • When sewing over thick area, the fabric was pushed with the needle still in the fabric. • Poor quality thread, unevenly wound or knotted. • See pages 29 and 30 for information about needles. Sewing computer fails to run or runs slowly • Plug not properly inserted. • Power switch in off position. • Sewing computer has been standing in a cold room. • Bobbin winder still switched on. 032622.50.04_0701_a210_EN