How can i fix the bobbin tension on my sewing machine? I know there is a s***w on the body you can tighten.?

Question

Assume the tension has been set perfectly in the usual places, the right size needle is used for the fabric, everything is threaded properly, and all is well in machine land. I know machine repairmen have always gone to a little s***w that is recessed in the body of the machine. It sits all alone. They give it a quarter turn sometimes or a half, and the problems are gone. I'm talking about problems of the bobbin stitch not matching the top stitch by either being too loose and knotting or by breaking due to too much tension. Can you help me? I would like to permanently get my machine working smoothly so I can sew without aggrivation. I just want to sew a half hour project in less than 12 hours. YA KNOW? I have 40 years experience so it's not like I don't know how to adjust it in the usual way and perform the maintnence I need to perform. I am very good with my end of the deal. I use good thread, good fabric, good needles, but I seem to have bad karma.

Answer 1

My problem (with similar 40 years' experience) is usually not with the tension itself, but with fluff buildup in the machine innards.  I find a good cleaning sets things straight most every time.  Good luck.

Answer 2

the small s***w on the side of the bobbin is the tension adjust. hold the tread in your hand and with a light jerk the bobbin should slide down the thread slowly when you have the right tension. when the thread bunches on top it is the bobbin tension , when the thread is loose under ,the upper tension is loose.

Answer 3

On your bobbin case where you run the thread through the case you will see a plate with a s***w on top of the bobbin case. This is where you adjust the bobbin thread tension.  simply tighten the s***w or loosen it as to the requirements of the type of thread you are using.  This is easy to find as you need to remove the bobing case in order to put in a new bobbin.