Originally Posted by
labeelady
I recently went to a demo on the Bernette Deco 340. The Bernina rep said the same thing about using pre-wound bobbins! She said the machine winds them at the right tension. The pre-wound bobbins may or may not be wound correctly. In fact, she told me that if you take your machine to be serviced and they find out you're using pre-wound bobbins, they may void the warranty!
Interesting, especially since Bernette is not made BY Bernina...they're made FOR Bernina. To the best of my knowledge, Bernette sewing machines are actually manufactured by Janome while Bernette sergers are made by Juki.