In most cases changing the needle tension is enough to get a perfect stitch. But sometimes the added tension is too big for the thread you are using and may cause thread breakage or skipped stitches. In this case, it might be necessary to change the bobbin tension also.
What number should bobbin tension be?
Proper bobbin tension is essential to good embroidery. If tension is too tight, unwanted bobbin thread may begin to show on top of your garment and you may begin to experience frequent thread breaks which wastes time and money. Bobbin tensions should be 18 to 22 grams (up to 25 grams when embroidering caps).
How do you know thread tension is correct?
To test if the tension is correct, insert a bobbin in the bobbin case. Then hold it up by just the thread, the bobbin case shouldn’t move. Give a little jerk on the thread and if the bobbin case slides down slightly, then the tension if perfect. If it drops freely, then it’s too loose.
What happens if bobbin tension is too loose?
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.
Will you adjust tension on bobbin thread?
As shown in the illustration, hold the bobbin case against a smooth vertical surface. If the thread with the weight attached is slowly pulled out, the thread tension is correct. Use the included standard screwdriver to turn the tension-adjusting screw and adjust the thread tension.
Why does the thread bunch up underneath?
Your Thread Tails Are Too Short
If the thread tails that come out of your bobbin are shorter than two inches, they may get sucked into your sewing machine when you begin to sew. This can cause thread bunching underneath your fabric.
What tension should my brother sewing machine be on?
The normal tension setting is 4.0. The upper thread and the bobbin thread should cross near the center of the fabric. Only the upper thread should be visible from the right side of the fabric, and the bobbin thread should be visible from the wrong side of the fabric.
Probable Causes: – Top or bobbin thread is not set correctly. – Make sure that the bobbin was threaded properly in the shuttle race. …
When should you increase thread tension?
Needle thread tension is too loose
The needle thread needs to be tightened if the stitching thread shows loops on the underside. On the other hand if the needle thread is too tight, it will pull up the bobbin thread and also show it on the topside.
Why is the tension wrong on my sewing machine?
Needles, threads, and fabrics: Different thread sizes and types on top and in the bobbin can throw off basic tension settings. A needle that’s too large or small for the thread can also unbalance your stitches, because the size of the hole adds to or reduces the total top tension.
Why is my needle getting stuck in the bobbin?
If the threading tensions are wrong, it can cause your thread to get stuck in the bobbin. And this can be from the top or bobbin thread, so have a look at both threads and fix the issue. Ensure that the top thread can feed through the sewing machine without any obstruction.
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. … Be sure that you have the bobbin thread engaged in the bobbin tension.
Why does my bobbin thread keep breaking?
A dirty shuttle race, improper thread routing or incorrect thread tension can break the bobbin thread in a sewing machine. Unplug the sewing machine and check thread routing according to guidelines in your owner’s manual. Reroute the thread correctly if necessary.
What tension should I use for thick fabric?
You will usually be alright with a 4 or 5 on medium to medium-heavy fabrics like linen and twill weaves such as drill and denim. Thick upholstery fabrics may require a higher tension setting and a longer stitch, and lighter fabrics like cotton or even sheers will require a lower tension setting.