Improve embroidery results: troubleshoot step by step

The quickest way to improve a poor embroidery result is to troubleshoot in a fixed order instead of immediately changing thread tension. Check the upper thread path and bobbin first, then the needle, hooping and stabilizer, followed by the embroidery design. A small tension adjustment only makes sense once those basics are correct.

This guide is Make ma!’s central troubleshooting hub. It helps you identify the symptom, run a controlled test stitch and move directly to detailed help for a specific fault. The manual for your machine and its specifications for needles, thread and bobbins always take priority.

What exactly does the faulty stitch-out look like?

“The machine stitches badly” can describe several different faults. If an outline shifts away from the fill, movement in the fabric, an oversized hoop or unsuitable digitizing are common starting points. Loops point more often to incorrect upper threading, unsuitable tension or a problem around the hook. Puckering and distortion usually involve the combination of fabric, hooping, stabilizer and stitch density.

Before changing anything, note what happens, at which stitch or colour change it starts and whether the problem repeats on a scrap of the same material. Then change only one variable at a time. If you replace the needle, add stabilizer, reduce speed and alter tension together, a better test cannot tell you which change solved the problem.

The five-minute reset before changing settings

1. Stop and make the machine safe: remove thread remnants only with the machine switched off and follow the cleaning instructions in its manual.
2. Rethread the upper thread completely: raise the presser foot so the tension discs can open, then follow every marked guide from the spool onward.
3. Reinsert the bobbin: use the bobbin type and embroidery bobbin thread specified for your model. Check winding, orientation and thread path.
4. Inspect the needle: when in doubt, fit a new, undamaged needle that matches the machine, fabric and thread, inserting it fully and correctly.
5. Prepare a test stitch: use the same fabric, stabilizer, thread and, where possible, the same part of the design as the final project.

This earlier Make ma! video shares practical ideas from our embroidery work. Treat it as additional experience; current manuals and manufacturer approvals govern model-specific settings.

Guide the upper thread and bobbin thread correctly

A skipped guide or thread that has missed the tension discs can create loops, breaks and uneven stitches. Do not rethread only the last few centimetres: begin at the spool. Check that the correct spool cap is fitted, the spool can feed freely and the thread is not catching on a notch, label or rough edge.

A rule such as “every spool must unwind anticlockwise” is not valid for every machine. The machine or external stand determines whether thread feeds from the side of a rotating spool or off the top of a stationary cone. Follow the manual and the spool construction. For ordinary embroidery, smooth-running 40-weight threads such as GUNOLD Poly 40 or SULKY Rayon 40 are common starting points, but suitability for your machine and project remains decisive.

Bobbin size, shape and thread weight are model-specific. Do not assume overlocker thread is a suitable replacement. A damaged, unevenly wound or incorrect bobbin can feed inconsistently. If thread tangles beneath the needle plate, see “Thread nest under the needle plate”. If the upper thread frays or breaks, continue with “Embroidery thread frays, sheds or breaks”.

Match the needle to machine, material and thread

The needle system must match the machine first. Many domestic machines use 130/705 H, while multi-needle and industrial machines may need a different system. Next choose point and size for the fabric and thread. Knits often require a different point from firm woven fabric; metallic or thicker threads may need a larger eye. A size 75 embroidery needle in system 130/705 H-E is therefore a common option, not a universal answer.

Replace a bent, blunt or damaged needle immediately. An unfamiliar tapping sound, skipped stitches or increasing fraying are also good reasons for a controlled needle change. A fixed number of operating hours is less reliable than the condition of the needle and the demands of the project. Never fit a similar-looking overlocker or industrial needle unless the manual explicitly specifies that system.

Hoop the fabric and provide suitable support

Fabric should sit smooth and stable in the hoop without being artificially stretched. If stretched fabric relaxes after removal, the embroidery puckers. Select the smallest hoop that accommodates the design with safe clearance; an unnecessarily large hoop gives the fabric more room to move. Also keep heavy excess fabric from pulling on the hoop and leave the embroidery arm unobstructed.

The stabilizer must support the fabric type, design size and stitch density. Tear-away may be enough for stable woven fabric, whereas stretchy knits generally need longer-lasting support. On pile, a water-soluble topper can prevent stitches from sinking into the surface. The stabilizer adviser guides you by material and use. For an existing distortion problem, read “Why is my embroidery distorted?”.

Check the embroidery design, density and size

An unsuitable design cannot be permanently repaired with more stabilizer or greater tension. Too many overlapping stitches, extremely short stitch lengths, unsuitable underlay or excessive density increase friction and pull. Outlines can also shift when pull compensation does not suit the material.

Do not resize a finished file arbitrarily on the machine: depending on the system, stitch count and density can remain unsuitable. Use a professionally digitized size and test it on representative scrap fabric. If the same fault occurs at the same point on several fabrics or machines, the design becomes the stronger suspect. Visible gaps are covered in detail in “Gaps in an embroidery design”.

Adjust thread tension and speed only after the basics

Thread tension is not the first control for every problem. Confirm threading, bobbin, needle, stabilizer and design first. Then examine both sides of a test stitch. Bobbin thread on the face can indicate excessive upper tension, but an incorrectly inserted bobbin can produce a similar appearance. See “Bobbin thread showing on top” for the focused checklist.

Change upper tension in small increments and record both the starting value and the result. Adjust the bobbin-case screw only if the manual for your model explicitly permits it and you can mark the original position. Slower embroidery may help with small outlines, special thread or a large hoop, but it cannot replace correct preparation.

Symptom table: where should you look first?

Useful tools are organized by task in the separate article “Embroidery-machine accessories: what you really need”. Do not buy at random, though: a controlled test usually shows whether you need different material, a tool, a revised design or maintenance.

Frequently asked questions about embroidery quality

Should I change tension first?
No. Rethread upper and bobbin threads, then check the needle, bobbin, hooping, stabilizer and design. Only then change upper tension in small, recorded steps.

Which side of the test stitch should I inspect?
Both. The face shows outlines, gaps and puckering; the reverse helps assess threading and tension. The ideal balance varies with machine, stitch type and manufacturer guidance.

Is polyester always better than rayon?
No. Polyester is often robust for frequently washed or heavily used textiles, while rayon provides a characteristic sheen for decorative work. Intended use, machine, design and smooth feeding determine the better choice.

When is professional service necessary?
When the needle contacts metal parts, the needle plate or hook has a burr, timing problems recur, unusual noises persist or faults remain after a correct setup with several tested materials.

How should I document a fault for support?
Record the machine model, needle and thread type, bobbin thread, fabric, stabilizer, file format, design size and stitch at which the problem begins. Photos of both sides and a short video are much more useful than “it stitches badly”.

Sources and manufacturer guidance

• Brother: how thread, bobbin, needle, stabilizer and hooping work together
• Brother: assess and adjust upper-thread tension for embroidery
• SCHMETZ: diagnose needle faults, loops, puckering and irregular stitches
• GUNOLD: select stabilizer by fabric and application
• BERNINA: troubleshoot embroidery designs and hooping