Explanation
Thread tension balances the interaction of top and bobbin threads during embroidery.
Only if both tensions are correctly adjusted will the stitch be clean and even.
- Top thread tension: adjusted on the machine
- Bobbin thread tension: adjusted at the bobbin case
Common issues with incorrect tension
- Too tight: thread breaks, fabric puckers, embroidery looks stiff
- Too loose: loops, visible bobbin thread on top, uneven outlines
Practice
- In a correct tension setting, the bobbin thread should be just slightly visible on the underside of the fabric.
- A common test is the “drop test” or pull test on the bobbin case.
- Specialty threads (e.g. metallic, thicker threads) often require custom tension settings.
Tip: Regularly check and fine-tune thread tension – even small changes can have a big impact on embroidery quality.