How to Back Stitch a Seam
Why is my back stitch so 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.
Where is the reverse switch on a sewing machine?
Locate your reverse stitch knob, button or switch. Reverse stitch mechanisms are most often located on the front of your machine, either on the center of the faceplate, above the needle or on the left-most front.
Do you have to back stitch when sewing?
By contrast, in seams, there is stress on the stitching at the beginning and end of a seam whenever the two pieces of fabric are pulled apart, so backstitching is necessary to prevent the stitches from unravelling.
If your thread is pulled tight on the underside and not forming an even stitch then (counter-intuitively) it’s usually the top thread tension that’s wrong. Sometimes very lightweight fabrics such as sheers can get dragged down into the machine so it’s a good idea to use a straight stitch plate.