I was told when I first started quilting to change my needle every 8 hours of use and the guideline was every 3 bobbin fill-ups which was easy to understand. Now I use Aurifil 50 cotton thread which is so much finer so I change my needle every other bobbin fill-up or when I am starting quilting a new quilt. It may sound excessive but when I saw a group member ruin her new £350 machine with a cheap needle and saw the image of a dull needle, see below pic, a cost of a new needle pales into insignificance when compared to possibly ruining my lovely machines!
Last edited by QultingaddictUK; 02-26-2015 at 09:06 AM.