Originally Posted by
Hulalulu
In my ignorance, wound a bobbin with invisible thread -- and then the bobbin would not come off the winder peg. Took the machine in thinking it was the machine's fault! It had created a tension of it's own, and squeezed it too tight to remove.... After hours of unwinding the bobbin was free, free at last!
Yes. What happens is that the invisible thread stretches more than regular thread. This is why you want to wind the bobbin slowly -- to keep the thread from stretching while the bobbin is being loaded. It's also a good idea to fill bobbins only 3/4ths full -- especially if you are using plastic bobbins, although I also do it with my metal bobbins. This is to ensure that the outer edge of the bobbin does not distort from the thread and create havoc when you go to sew.