Repair Manual Bernina 1001 Or 1000 Series Sewing Machine
Chosen Solution Having problems with the bottom thread; on the top a straight stitch, on the bottom a rather loose “S”-shape bobbin thread. Tried all kinds of upper- and bobbin-tension settings, needles, threads. Hook seems to be on time; no “pick-up” issues. The feed-dogs seem on time. Top-tensioner seems to work fine too. Have 2x metal bobbin holders, tried with different bobbins (metal & plastic), tried all kinds of tensions; same result....