Troubleshooting
A tangled mass of thread, usually beneath the fabric, that stops feeding and may pull fabric into the plate.
Start here
Loops underneath commonly begin above the fabric when upper thread misses the tension discs or take-up lever.
Raise the presser foot, remove thread completely, lift the take-up lever, and rethread from the spool.
Hold both thread tails behind the foot for the first few stitches, especially near a raw edge.
Remove the bobbin and case, cut away trapped thread, and replace a bent needle before testing.
Useful distinction
Cut the threads and open the bobbin area. Forcing fabric out can bend the needle bar or damage the hook.
Practical guide
A nest beneath the fabric often originates above it. Upper thread that misses the tension discs or take-up lever is carried around the bobbin without being pulled back into a formed stitch.
Switch off and unplug the machine. Raise the needle only if it moves freely, and cut accessible threads. Remove the needle plate or bobbin area parts as the manual permits. Cut the nest into short sections and lift the work away instead of pulling against a locked hook.
Raise the presser foot so the tension discs open, bring the take-up lever to its highest point, remove the thread, and begin again at the spool. Verify each guide and the lever rather than correcting only the visible thread near the needle.
Remove lint and thread fragments, inspect the case for grooves or displacement, insert the correct bobbin in the specified direction, and follow its tension path. Replace a bent needle before testing because a hard jam may have damaged it.
Pull both thread tails beneath the foot and toward the back, then hold them lightly for the first few stitches. Begin slightly in from a raw edge or use a leader scrap when soft fabric is being pushed into a wide plate opening.
Avoidable mistakes
Common questions
Loose upper thread is carried around the bobbin and cannot be pulled back into the fabric.
Not by itself, though poor winding or a loose tail can contribute.
Unsecured short tails may be pulled into the hook area.
No. A missed guide or tension disc must be corrected by rethreading first.
