Top Thread Showing on the Underside: Fix the Loops
Loops and long floats under the fabric mean the top thread lost its grip upstream. Here are the five checks that fix it, in the order that finds it fastest.
threading
Sewing Machine Tension: How It Really Works
Balanced stitches come from two threads pulling as equals. Here is how the whole tension system works, what each stitch state means, and why the dial should be the last…