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Sewing Machine Doctor

Drag to turn the sewing machine. Click the part that is giving you trouble - the needle, the top thread, the bobbin, the feed dogs, the handwheel or the pedal - and get the likely causes, the first fixes and the full guide.

Click the part of the machine where the trouble is - or pick one from the list.

How the Sewing Machine Doctor works

Almost every sewing machine problem starts in one of eight places: the needle, the top thread and its tension, the bobbin and hook, the feed dogs and presser foot, the handwheel and timing, the motor and pedal, the stitch settings, or a machine that simply needs cleaning. Pick the place and the panel lists what usually goes wrong there, in plain words, with the fixes that solve most cases at home.

The fixes follow the order sewing machine makers give in their own manuals: a new needle, re-threading with the presser foot up, the right bobbin, lint out of the hook area. Where a fix needs more than a few lines, the symptom links to a full guide.

The three fixes that solve most problems

Change the needle. A blunt or slightly bent needle causes skipped stitches, broken thread and pulled fabric. Needles are cheap; change one every 6-8 hours of sewing.
Re-thread the top thread with the presser foot up. With the foot down the tension discs are closed, the thread sits outside them, and you get a nest of loops under the fabric.
Clean the bobbin area. Take off the needle plate and brush out the lint. Packed lint changes the tension and makes the machine loud.

Questions

Why is my sewing machine making a bird's nest under the fabric?

A nest of thread under the fabric almost always comes from the TOP thread, not the bobbin. Raise the presser foot, take the top thread out and thread it again from the spool, making sure it goes through the take-up lever and between the tension discs.

Why does my sewing machine skip stitches?

Most often a dull, bent or wrong-type needle - for example a universal needle on stretchy knit. Put in a new needle of the right type and size, then re-thread. If it still skips, the hook timing may be off and a service shop can reset it.

How often should I clean and oil a sewing machine?

Brush out lint every few bobbins or after each project. Oil only where your manual shows and as often as it says - many newer machines are sealed and need no oil at all.