How to Fix Embroidery Machine Tension Problems
Embroidery machine tension problems usually come from threading, the needle, the bobbin or the stabilizer. Check those in order before you change the tension setting.
On this page (12 sections)
- What do the common tension signs mean?
- Does threading cause most tension problems?
- Can a dull needle cause tension problems?
- Does the bobbin affect embroidery tension?
- Can thread quality cause puckering?
- Does the stabilizer affect tension?
- Does a tight hoop look like a tension fault?
- Should you change the tension setting first?
- Does stitching speed change the look of the stitches?
- What does a balanced stitch look like?
- What if the problem stays?
- Fixing embroidery machine tension in the right order
Embroidery machine tension problems usually come from threading, the needle, the bobbin or the stabilizer, not from the tension dial. Loops, puckering and thread on the wrong side of the fabric are the first signs, and each one points to a different check.
If you're still choosing a first machine, embroidery machines for beginners compares the models in plain words.
What do the common tension signs mean?
Each sign points to a likely cause, but two causes can look alike. Match what you see on the fabric to the table, then run the check in the last column.
| What you see | What it usually means | Check first |
|---|---|---|
| Bobbin thread shows on top | Top thread is too tight, or the bobbin is threaded wrong | Rethread the top, then the bobbin |
| Loops of top thread on the back | Top thread is too loose, or it missed the tension discs | Rethread with the presser foot up |
| Puckered fabric around the design | Stabilizer too light, hoop too tight, or top thread too tight | Stabilizer, then the hoop |
| Tangle of thread under the fabric | Top thread missed a guide or never seated | Rethread from the spool |
| Skipped stitches | Dull, bent or wrong size needle | Swap in a fresh needle |
A tangle under the fabric is often called a bird's nest. Stop the machine, cut the tangle free and rethread the top from the spool before you stitch again.
Does threading cause most tension problems?
Yes, thread that isn't seated on its way to the needle is one of the most common causes of uneven stitches. Rethreading takes a minute, so do it before you adjust anything.
On most machines, raising the presser foot opens the tension discs, so lift it before you thread.
- Raise the presser foot.
- Follow the threading path shown on the machine.
- Make sure the thread sits in every guide and between the tension discs.
- Pull the thread gently to check that it moves freely.
Your manual shows the exact path for your model. Brother USA hosts manuals and support pages for Brother machines.
Can a dull needle cause tension problems?
Yes, a dull, bent or wrong size needle can skip stitches and look just like a tension fault. A fresh needle is the quickest test you can run, so swap it before you touch the dial.
Unplug the machine before you change a needle, and keep your fingers clear of the needle area while you work. On most home machines the flat side of the needle faces the back, so check your manual and push the needle up as far as it goes.
SCHMETZ's size 75/11 embroidery needles come on five-needle cards. They have a medium ball point and an enlarged eye, which SCHMETZ says reduce friction on the thread.
Embroidery machine needles explains the sizes and when to change them.
Does the bobbin affect embroidery tension?
Yes, a bobbin wound unevenly or seated the wrong way changes how the stitch looks on the top and the back. Wind it evenly and don't overfill it.
Check that the bobbin turns the right way and that the thread runs through the path your manual shows. Most fixes start with the top thread, so leave any bobbin case adjustment alone unless your manual tells you to make it.
What if bobbin thread still shows on top?
Check the bobbin next if the thread still shows after you rethread the top. Pull it out, look at the winding, and seat it in the case the way the manual shows.
How does lint affect the bobbin area?
Lint around the bobbin area can get in the way of the thread and change how it feeds. Clean it out with the lint brush that came with your machine before you change any setting.
Can thread quality cause puckering?
Yes, thread that tangles or unwinds unevenly can pull harder on one side of a stitch, and that can look like a tension fault. Embroidex says spools tossed in a box or drawer tend to tangle and unravel.
New brothread says the elasticity and tenacity of polyester lower the risk of looping and puckering. Its 40 color kit uses 40 weight polyester on 500 meter spools, so a fresh spool shows you whether the problem follows the thread.
A new thread brand or weight can change how stitches look, so run a short test whenever you switch. If you've been sewing with regular thread, read embroidery thread vs sewing thread first, since the two are made for different jobs.
Does the stabilizer affect tension?
Yes, a stabilizer that's too light for the design lets the fabric shift and pucker. Match the stabilizer to the fabric and the stitch density, not only to the hoop size.
New brothread's 12 in tear away roll is a medium weight at 1.8 oz (50 grams), and the brand says it suits light to medium stitch density. For denser designs, the brand says to use more than one layer.
The brand also says tear away works best on firmly woven fabrics, so stretchy knits usually need a cut away instead. Stabilizer for knits, towels and hats covers those fabrics, and do you need stabilizer for embroidery explains the basics.
Does a tight hoop look like a tension fault?
Yes, a hoop set too tight stretches the fabric, and the puckering shows up once you take the hoop off. Loosen the hoop, rehoop the fabric flat, and stitch a test patch before you blame the tension.
The fabric should lie snug and flat in the hoop, not pulled tight like a drum. A loose hoop causes trouble too, since the fabric can shift while the needle works.
If the hoop is the wrong size for your design, embroidery hoop sizes explained covers the sizes home machines use.
Should you change the tension setting first?
No, change the tension setting last, after threading, the needle, the bobbin, the stabilizer and the hoop all check out. Then move the dial one small step at a time, since a big jump can swing the stitch too far the other way.
Write down the starting setting so you can go back to it. A short log makes a repeat problem much easier to solve, so note these each time:
- The thread brand and weight
- The needle type and size
- The fabric and stabilizer
- The tension setting and the result
Test embroidery machine tension on scrap fabric
A scrap test shows whether a change helped in a few minutes, so you don't spoil a finished piece. Use the same fabric and stabilizer you plan to use for the project.
- Hoop a scrap of the project fabric with the same stabilizer.
- Stitch a short design with a satin column or lettering, since those show tension best.
- Look at the top and the back.
- Change one thing, then stitch the test again.
Does stitching speed change the look of the stitches?
It can, since fast stitching puts more strain on the thread as it passes through the tension discs. Slow the machine down while you test, then speed up once the stitches look right.
Simthread, for example, suggests 600 to 800 RPM for its polyester embroidery thread. Check your machine's manual for the speed range it recommends.
What does a balanced stitch look like?
A balanced stitch lies flat, with no bobbin thread on top and no loops on the back. Look at both sides of the test patch.
On the back of a satin column, a common rule of thumb is a band of bobbin thread down the middle with top thread along both edges. Many embroiderers aim for about one third bobbin thread.
What if the problem stays?
If the problem stays after these checks, the machine may need a service visit. Bring a sample of the bad stitching, the thread you used and notes on what you changed, since those help a technician find the cause.
Fixing embroidery machine tension in the right order
Start with threading, then the needle, the bobbin, the stabilizer and the hoop, and touch the tension setting last. That order catches most problems before you change a dial.
If breaks keep coming back, read why embroidery thread keeps breaking next, since breaks have causes of their own.
Frequently asked questions
What usually causes embroidery machine tension problems?
Most tension problems come from threading, a dull or wrong size needle, an unevenly wound bobbin, or a stabilizer that's too light for the design. Check those four first, then change the tension setting one small step at a time.
How do I know if the top tension is too tight?
Bobbin thread showing on the top side is the usual sign that the top tension is too tight, while loops of top thread on the back point the other way. Stitch a test on scrap fabric after each change so you can see the result.
Should I change the bobbin tension to fix stitches?
Usually not, because most tension fixes start with the top thread. Rethread the top first, then check how the bobbin is wound and seated, and leave the bobbin case adjustment alone unless your manual tells you to make it, and test on scrap fabric after.
Can a stabilizer cause puckering that looks like a tension problem?
Yes, a stabilizer that's too light for the stitch density lets the fabric shift and pucker around the design. Match the stabilizer to the fabric and the design, and try an extra layer on dense designs before you change the tension setting.
