How to Adjust Bobbin Tension
Bobbin tension is easily adjusted with the aid of a flat head screw driver. Unlike top tensions, a little goes a long way.
To make adjustments to your bobbin tension, we turn the large screw on the bobbin case. (If your machine has a drop-in bobbin mechanism, this post isn’t relevant for you as you will most likely pop in a new bobbin case for embroidery, quilting, sewing, etc.) Think of the adjustment screw like a face of a clock, we recommend making adjustments in 5-15 minute increments.
Testing Bobbin Tension
There are two quick ways to check your bobbin tension to see if adjustments need to be made.
-Use a bobbin tension gauge, like the TOWA, to get an accurate tension reading
-Do a lift test by placing the bobbin case (with the bobbin inside) in the palm of your hand and pulling the tail of the bobbin up with your other hand. The case should lift to a vertical position and then rotate freely in your palm. If bobbin case lies flat while thread is unwinding, tighten the tension. If bobbin case lifts off your hand, loosen the tension.
Adjusting your tension ...read more