Loops, tangles or broken thread
Compare both sides, a compact nest, or the thread that broke.
Start with what you can see
Check safely.
Compare clearly.
Sew with confidence.
Stitch, thread, needle or fabric trouble? Match what you observe, check one thing at a time, and know when to stop.
Visible symptom atlas
What is the machine doing?
Missing or unexpected stitches
Separate ordinary skips, thick-seam skips, bobbin pickup and zigzag shape.
Fabric will not move as expected
Check feed, fabric sinking at the plate, or reverse versus locking stitches.
Needle contact or a jam
Stop first. Find the safe boundary for a striking needle or trapped thread.
Visual reference
Compare a cue. Keep its limits.
Illustrations help you recognize an observation, not diagnose a hidden cause.
Keep every check bounded.
1. Observe
Identify the visible state.
2. Check
Try the safest permitted check.
3. Verify
Compare the result on your own sample.
4. Stop safely
Use the exact manual or arrange service when guidance ends.