I've been working hard on getting the Sunday-Best Sue quilt top done. Last night I started having trouble with my machine or me. It kept pulling my fabric into the feed dogs, chewing it & grumbling loudly. I only get about 3 hrs sleep a night so was really tired & figured it was me. Decided to put it away for the night. Went to bed. Up at 3 a.m. frogging all the fancy stitches I put on this long strip. I went to try again & it happened again. Long story short..it kept doing it. I took my machine all apart to clean under the bobbin case & presser foot plate. Got it all cleaned out, put it back together..still doing it. Changed bobbins; still doing it. Made a fresh bobbin. Still doing it. Finally in desperation & near tears I got a new spool of (embroidery) thread this time from my DH stockpile. Made a matching bobbin & my sewing machine is purring like a kitten again! I tell you this not to complain or whine, but to hopefully help someone else who has this problem with their machine before they end up taking it for service with such a simple fix. I really love this sewing machine. It's worked really hard since I've had it with no complaints.