Photograph both sides
Use two thread colors and photograph the top and underside of the same controlled test seam.
Stop guessing at the tension dial
Turn one ugly test seam into one safe next step.
Send clear photos of the top and underside. Within 24 hours, receive the two most likely causes, one reversible test grounded in your machine manual, and a setup card you can reuse.
One-time purchase. No subscription. U.S. adult pilot only. If we cannot provide a safe actionable next test, we refund the diagnostic.
Next safe test
Rethread the upper path with the presser foot raised, following your exact machine manual. Then sew the same test again without changing anything else.
A controlled troubleshooting loop
Photos in. One test out.
No generic list of twenty things to try. The pilot narrows the evidence, changes one reversible variable, and records what actually worked.
Add your exact setup
Tell us the machine, manual, fabric, needle, thread, bobbin, stitch and the fixes you already tried.
Run one safe test
Receive two likely causes, one manual-supported next test, stop conditions and a reusable setup card within 24 hours.
Human-reviewed
This pilot is not an automated diagnosis. Each response is checked against the evidence and your machine documentation.
Useful after the fix
Your setup card records the machine, fabric, needle, threads, bobbin, stitch, settings and result.
Honest uncertainty
If the photos do not support a safe test, we say so, point you to qualified service and refund the diagnostic.
Hard safety boundary
No internal repair guesses.
StitchCheck is limited to reversible checks supported by the consumer manual for your exact model.
- No opening the housing, electrical work, timing adjustment, hook adjustment or bending parts.
- No bobbin-tension adjustment unless the exact consumer manual explicitly permits it.
- Needle strikes, burning smells, electrical symptoms, severe noise and broken parts stop the process and require qualified service.
Founding pilot
$7
One human-reviewed test-seam diagnostic, delivered by email within 24 hours after a complete intake.
Check my test seam
No subscription. Processor fees come from the sale, never from an owner-funded validation budget.
Outside the United States?
Join the country waitlist. This records interest only and does not authorize marketing email.