As the bobbin thread tension is factory-set and wouldn’t usually be adjusted for normal sewing. So we’ll be talking only about the top thread tension since that’s where you’d usually make the adjustments. The dial settings run from 0 to 9, so 4.5 is generally the ‘default’ position for normal straight-stitch sewing.
What tension should I use for cotton?
Cotton requires a moderate tension setting, usually between three and four. Always start adjusting your tension settings with your upper tension.
What tension should I use for thick fabric?
For thick upholstery fabric, use upholstery weight thread with a size 16/100 or 18/110 sharp needle. If you’re sewing denim or canvas, try heavy duty thread with a denim needle size 90/14.
What is tension control on a sewing machine?
Sewing machine tension adjustment is controlled by devices that separately control the needle thread and the bobbin thread, putting varying amounts of tension (or strength) on the threads they control to form a strong, balanced stitch.
Why is my thread bunching underneath?
A: Looping on the underside, or back of the fabric, means the top tension is too loose compared to the bobbin tension, so the bobbin thread is pulling too much top thread underneath. By tightening the top tension, the loops will stop, but the added tension may cause breakage, especially with sensitive threads.
How do you tell if your bobbin tension is off?
The thread should unwind just slightly and the bobbin case should drop an inch or two. If the thread unwinds without resistance and the case slips to the floor, your bobbin tension is too loose. If the bobbin case doesn’t budge, your bobbin tension is too tight.
When should I adjust the tension on my sewing machine?
When lower tension is too loose (or upper tension is too tight), knot is visible on right side (left). When upper tension is too loose (or lower tension is too tight), knot is visible on wrong side (right). Tensions can still need adjustment even if they’re balanced.
What should the tension be on a Brother sewing machine?
The standard tension setting is 4. Start with this, and based on what your test stitching looks like, tighten the tension (below 4) or loosen it (above 4). Typically on Brother machines, to loosen the upper thread tension, turn the dial left. To tighten it, turn the dial right (source).
Why won’t my sewing machine sew through thick fabric?
If the presser foot misalignment is too large, place thick paper or fabric (with the same thickness as the fabric being sewn) under the heel of the presser foot to be able to start sewing smoothly.
What tension should I use for polyester?
Fortunately, you don’t need to think too much about it – set up your machine for polyester, and it will cope with most types of poly fabrics without further adjustments being needed. As a general rule of thumb, the upper tension will usually be around a 4.