There are magnetic bobbins that are designed to work without the check spring installed. I actually have 3 bobbin cases in use at anytime. One with no check spring for MagnaGlide magnetic core bobbins, one that I use with prewound Superbobs and one for bobbins that I wind myself. I also keep a couple brand new spare bobbin cases on hand.
Sunday, December 2, 2012
Tech Sunday - Bobbin Cases
Most of us don't think about our bobbin cases very often. Usually we only pay attention to them when we are setting our tension. They are an essential part of our machines and we all should pay a little more attention to them. When we don't they have a tendency to make us pay with things like tension that we can just not get to balance. Frustration until you want to throw something or scream. That little metal case can cause a grown girl to cry... literally. I don't know about you, but every once and a while I drop a bobbin case. I try not to, but it happens. Even dropping it on my carpeted floor can knock that case out of round. It is important to really look at your case if you drop it. If it is out of round replace it. It is just not worth the headache of trying to balance tension with a bobbin case that is not round. Trust me, I have tried. I have even trying to reround the case and that has not worked out very well for me. Bobbin cases are relatively cheap. Always have a spare or two.