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.
The sharp point of the needle catches the bobbin thread, which makes a loop. This interaction creates knots, which are the building blocks of sewing machine stitches. If the needle is dull, this process may not work properly, causing a knot to get caught in the bobbin thread area instead of in the fabric.
Why does the thread on my sewing machine knot up under the material?
If the thread has knots, is not smooth, is uneven, or is loose on the bobbin, then it has not been threaded correctly. If your machine uses a bobbin case, follow your sewing machine’s instructions to remove the bobbin from the case and re-thread it.
Why is my sewing machine Birdnesting?
On some home sewing machines birdnesting happens when the line jumps out of the take up lever, which severely reduces tension on the thread, allowing it to be pulled to the bottom of the hoop easily. Unthreaded take-up levers will always cause birdnesting.
Why does my thread keep snapping?
For details, refer to “Upper threading”. The upper thread tension could be set too tight. Set the tension to the best thread tension setting or less. Make sure the spool of thread is installed correctly using the correct size spool cap for the size of spool.
How do I stop my sewing machine from bunching up?
A good cleaning may solve your bunching woes (check your manual for guidelines on cleaning and maintenance; your machine may also need to be oiled). To prevent stitch glitches, be sure to frequently dust underneath the throat plate and along the thread path, and to periodically clean and oil your machine.
What number should tension be on sewing machine?
The dial settings run from 0 to 9, so 4.5 is generally the ‘default’ position for normal straight-stitch sewing. This should be suitable for most fabrics. If you are doing a zig-zag stitch, or another stitch that has width, then you may find that the bobbin thread is pulled through to the top.