Embroidery machine bird nesting: why thread bunches under the plate and how to fix it

You hit start, the machine sounds normal for a few seconds, and then the hoop stops moving freely. Underneath there’s a thick wad of thread glued to the fabric. That wad is a bird nest, and it’s a problem many new embroiderers meet sooner or later.

The good news is that the cause is usually simple. Below is the order to check things in, based on Brother’s troubleshooting list and Madeira’s guidance, plus how to get the nest out without damaging the machine.

What is bird nesting in machine embroidery?

A bird nest is a tangle of thread that builds up on the wrong side (the underside) of the fabric, between the fabric and the needle plate. Brother’s manuals call it “thread is tangled on the wrong side of the fabric.”

It usually means the top thread isn’t being held under tension. Instead of forming tight stitches, the thread gets pulled down in loose loops that the bobbin hook keeps wrapping. The nest can lock the fabric to the needle plate in seconds.

Quick diagnostic table

Use this to narrow the cause before you start taking things apart.

What you see	Most likely cause	Check first
Large nest underneath within the first few stitches	Upper thread not seated in the thread path	Rethread from the spool with the presser foot raised
Loops of top thread on the right side, nest underneath	Upper tension far too loose, or thread jumped out of a guide	Rethread, then check the tension setting
Nest only after a bobbin change	Bobbin inserted wrong or not under the tension spring	Reseat the bobbin
Nest plus skipped stitches or a clicking or unusual sound	Bent, dull or wrong needle	Replace the needle
Nest under small lettering or dense areas	Fabric bouncing; no ball point needle for short stitches	Hooping, stabilizer and needle type
Nest only on a stretchy or thin fabric	Fabric not taut, too little stabilizer	Re-hoop with a cut-away

How to remove a bird nest safely

Don’t pull the hoop off the machine while the nest is still attached. The thread is wrapped around parts you can’t see, and pulling can bend the needle or drag the fabric into the hook area.

Brother’s manual has a procedure for fabric that’s caught in the machine. This is that procedure, adapted for embroidery:

1. Stop and turn the machine off. Brother says to do this immediately.
2. Raise the needle. If the needle is down in the fabric, turn the handwheel toward the back (away from you) to bring it up.
3. Cut the threads from the top. Snip the top thread above the fabric. Then lift the fabric slightly at the hoop edge and cut the threads running between the fabric and the needle plate. Curved scissors or snips help here.
4. Lift the hoop free. Once the threads underneath are cut, the hoop should lift without resistance. If it doesn’t, cut more threads instead of pulling.
5. Clear the bobbin area. Remove the needle plate cover and bobbin, then pull out loose thread with tweezers. Brother’s procedure also covers removing the bobbin case and needle plate with the included screwdriver to clean the race if thread is wrapped inside.
6. Check the needle. Brother says to inspect the needle and replace it if it’s bent or damaged.

Brother adds a clear warning: if you can’t complete the procedure, don’t force it. Contact an authorized service center. That warning is worth taking seriously on a machine still under warranty.

Then trim the nest off the back of the fabric. If the design isn’t ruined, you can often rethread, step the design back a few stitches on the screen, and keep going.

What causes bird nesting, in order of likelihood?

1. The upper thread isn’t threaded correctly

Brother’s List of Symptoms gives “upper threading is incorrect” as the first cause of thread tangling on the wrong side of the fabric. This includes the thread slipping out of a guide, missing the take-up lever, or a spool cap that doesn’t fit the spool.

Brother’s threading steps have you raise the presser foot before you thread. The manual states that if the presser foot isn’t raised, the machine can’t be threaded. If you threaded with the foot down, or the thread popped out of a guide while you were changing colors, start over.

The fix:

1. Cut the thread near the spool and pull the rest out through the needle. Don’t pull it backward up through the tension path.
2. Raise the presser foot.
3. Rethread the whole path, following the numbered guides on your machine and the manual.
4. Use a spool cap that fits the spool. Brother says to choose the spool cap that best fits the spool you’re using.
5. Lower the foot and gently pull the thread near the needle. It should feel resistant, not loose.

2. The bobbin isn’t seated correctly

The bobbin side shares the blame more often after you’ve just changed it. Brother lists “bobbin is set incorrectly” and “bobbin thread is incorrectly wound” as causes of bobbin problems. Its tension page also notes that if the machine stops during embroidery, you should reset the bobbin and make sure the thread has passed under the tension spring.

The fix: Remove the bobbin, check that it drops in the direction your manual shows, and pull the thread through the slot so it catches under the tension spring. Brush lint out of the case while you’re there. Madeira suggests cleaning the bobbin case with compressed air when you change bobbins.

Bobbin thread matters too. Brother says to use the included embroidery bobbin thread or a recommended one, and that its included bobbin case is set for 90 weight bobbin thread. Madeira notes that prewound bobbins give consistent tension and that filament bobbin thread makes less lint than spun thread. See our embroidery thread guide for bobbin thread options.

3. The needle is bent, dull or the wrong type

Brother lists improper needle as a bird-nest cause and recommends a ball point embroidery needle for patterns with short stitches, such as small letters. Brother’s needle page also says to replace the needle if you hear an unusual sound or get skipped stitches. A needle that’s even slightly bent can miss the hook and leave loose loops.

The fix: Install a fresh needle in the size your manual recommends. Brother suggests a 75/11 needle for most embroidery and a 90/14 if the machine doesn’t stitch well on heavy fabric. Our embroidery needles guide covers sizes and points.

4. Upper tension is far too loose

Brother’s tension page says loops on the right side of the fabric mean the upper tension is too loose, and you should tighten it. Very loose upper tension and missed threading look similar, so rule out threading first.

The fix: After rethreading, return the tension to the machine’s default and run a test on scrap. Only then adjust in small steps. If the problem flips to bobbin thread showing on top, you’ve gone too tight. That’s covered in bobbin thread showing on top.

5. The fabric isn’t hooped firmly or needs more stabilizer

Brother’s symptom list includes fabric that was “prepared insufficiently for embroidering,” and its hooping instructions say the fabric should be taut. When fabric is loose in the hoop, it lifts and drops with the needle, which disrupts stitch formation.

Madeira says the garment should be snugly hooped with no stretching, and the fabric shouldn’t move when you run a finger lightly across it. It also recommends the smallest hoop that fits the design.

The fix: Re-hoop with the stabilizer and fabric together, taut but not stretched. Use a cut-away on knits and anything stretchy. Our hooping guide and stabilizer types guide go through it by fabric.

Step-by-step fix: the short version

If you just want the sequence, do this in order and test after each step:

1. Turn off the machine, cut the nest free from the top and underneath, and lift the hoop off.
2. Clean out the bobbin area and remove trapped thread.
3. Rethread the upper thread completely, presser foot up, with the right spool cap.
4. Reseat the bobbin under its tension spring, using embroidery bobbin thread.
5. Replace the needle if it’s been in for a while or touched anything during the jam.
6. Set upper tension back to default.
7. Re-hoop the fabric taut on the right stabilizer and stitch a test.

Most nests stop at step 3 or 4. If nesting continues after all seven steps, the problem may be inside the machine. Stop and contact the manufacturer or an authorized service center.

How do you prevent bird nesting?

• Rethread with the foot up every time you change thread. It’s the cheapest prevention there is.
• Watch the first stitches. Stay with the machine for the first few seconds of every color. A nest that’s caught early is a quick fix.
• Keep the bobbin area clean. Lint builds up under the bobbin case and around the tension spring.
• Change needles regularly. Madeira puts the lifespan of a machine embroidery needle at about eight hours of running time.
• Use thread made for embroidery. Brother recommends 40 weight rayon or polyester embroidery thread on top for most designs.
• Hoop taut, not stretched, with a stabilizer suited to the fabric. See cut-away vs tear-away stabilizer.

If you’re still getting started, our how to use an embroidery machine guide walks through threading and a first stitch-out. The rest of our troubleshooting guides cover thread breaking and puckering.