Sewing Machine Stitch Length Inconsistent: Diagnose Variable Spacing Without Blaming Tension First
When stitch spacing changes within the same sewing run, prove that the distance between needle penetrations is actually changing before adjusting thread tension. A seam can look uneven because of skipped stitches, loops, puckering, or sideways drift even when the physical stitch spacing is regular. The useful diagnostic path is to measure the seam, retest