Machine Embroidery Troubleshooting — 12 Common Problems Solved

Even experienced embroiderers hit snags — thread breaks, skipped stitches, puckering, misaligned colours. Most problems have straightforward causes and fixes. This guide covers the 12 most common issues and exactly how to solve them.

1. Thread Keeps Breaking

Thread breakage is the most common embroidery problem. Work through these causes in order:

• •Wrong needle size or type — use an embroidery needle (not a sewing needle), sized for your thread weight. 40-weight thread → 75/11 needle.
• •Needle is dull or damaged — replace the needle. Change after every 6–8 hours of stitching.
• •Thread tension too high — reduce upper thread tension by one or two settings.
• •Thread quality — cheap thread breaks more. Use reputable 40-weight polyester.
• •Thread path obstruction — re-thread the machine completely, making sure thread follows every guide and the tension discs.
• •Bobbin tension incorrect — check bobbin thread runs smoothly with slight resistance.

2. Skipped Stitches

• •Bent or blunt needle — replace immediately.
• •Wrong needle type — use an embroidery needle, not a universal sewing needle.
• •Needle not inserted correctly — push fully up into the clamp before tightening.
• •Machine speed too high — reduce to medium speed for dense designs.
• •Needle too fine for the fabric — use a larger needle for denim, canvas, or thick stabilizer stacks.

3. Design Puckering or Pulling

Puckering means the fabric is gathering under the stitching. Causes:

• •Insufficient stabilizer — use a heavier weight or add a second layer.
• •Fabric not hooped firmly enough — re-hoop with the fabric flat and taut.
• •Stitch density too high in the design — if you created the file yourself, reduce fill density.
• •Wrong stabilizer type for the fabric — knits need cutaway, not tearaway.
• •Hoop too large — use the smallest hoop that fits the design to maximise control.

4. Design Distorts or Shifts

• •Fabric slipping in the hoop — re-hoop more firmly or use a sticky stabilizer.
• •Stretchy fabric without adequate stabilizer — knits and fleece need cutaway stabilizer.
• •Design stitching order problematic — stitch fills from the centre outward where possible.
• •Machine speed too high — slow down, especially for dense designs on unstable fabrics.

5. Loops on the Back of the Fabric

Loops on the back (bobbin loops) indicate the upper thread tension is too low or the bobbin tension is too high. Increase upper tension slightly or reduce bobbin case tension.

6. Loops on the Top of the Fabric

Loops visible on the top surface mean the bobbin tension is too low. Increase it by tightening the screw on the bobbin case by a quarter turn at a time.

7. Thread Shredding at the Needle

• •Needle eye too small for the thread — use a larger needle.
• •Needle is dull and dragging the thread — replace.
• •Burr or rough spot in the needle eye — replace the needle.
• •Thread twist direction wrong — some specialty threads need a different needle orientation.

8. Colour Registration Problems (Layers Don't Align)

If colour layers stitch out of position relative to each other, the most common cause is the fabric moving in the hoop between colour changes. Check that the hoop is locked firmly and that the fabric hasn't shifted. Also check that your embroidery file itself doesn't have registration errors in the stitch data.

9. Thread Birds-Nesting at the Start of Stitching

• •Bobbin not seated correctly — remove and re-seat the bobbin.
• •Upper thread not pulled through presser foot correctly — re-thread from scratch.
• •Presser foot not lowered at start — always lower the presser foot before starting.
• •Starting stitch is a jump with thread tails too short — hold thread tails for the first 5–10 stitches.

10. Stitches Too Short or Machine Won't Move

If the machine is stitching in one place or barely moving, check that the embroidery foot is attached (not the sewing foot) and that the machine is in embroidery mode, not sewing mode.

11. Fill Stitches Look Sparse or Gappy

• •Design stitch density too low — if using SewFlow, the fill density is set automatically for standard fabrics.
• •Needle size mismatch — too large a needle spreads the holes and makes fills look thin.
• •Fabric stretching between stitches — ensure adequate stabilizer.

12. Machine Stops Mid-Design

• •Thread break detected by the machine's sensor — clear the thread, re-thread, and restart from the last colour stop.
• •Bobbin ran out — replace bobbin and restart from the nearest colour change.
• •Needle broke — replace needle, re-hoop if the fabric shifted, and restart.
• •Machine overheating — give it a 5-minute rest on very long runs.