http://patchwork-of-mini-grey.blogsp...nd-tricks.html
Suggestions here, feed dogs are down, when you stop your machine the needle should be down in the fabric before moving the quilt. Practice slowly, be sure there are no threads caught in the bobbin and the machine is threaded properly.
This link has some good points including thread type, needles and suggestions for how to. Don't get frustrated, just keep practicing it will come.
DianneRab