HQ Infographic: Troubleshooting Tension Issues
http://www.superiorthreads.com/education/tension/thread-tug-of-war-how-tension-works Great article for those ripping their hair out over how to fix tension issues
Learn how to adjust the tension on your sewing machine — plus what an ideal stitch should look like — for perfectly sewn seams, edges and more.
Fabulous comprehensive information for machine quilting! Read, read, study, study, learn this. Or just remember where you pinned it! xxx
Understanding Thread Tension. Diagrams and how to fix sewing machine tension problems.
Tension Trouble? A bird's nest on top usually means the upper thread tension is too tight; bird's nest on bottom, upper tension too loose.
Sewing Machine Tips for Presser Feet
Sewing Machine Repair – Common problems with stitches, threading, tension and bobbins! >> troubleshooting sewing machine tips and instructions
Check out these 6 Reasons Your Sewing Machine Is Having Tension Issues from Craftsy.
How To Get Perfect Tension - Tutorial for resetting your tension on your sewing machine