Bobbinwinder Noise at Vintage Berninas

Every now and then a lady will phone and say, My new Bernina is making a buzzing sound. Some of these ladies will then try to imitate the noise and some will just say ‘listen’ and put the phone near their Bernina.
Bernina Bobbinwinder ‘Noise’ is peculiar to those models of Bernina with an electric bobbin winder. If you operate the winder by pushing the bobbin winder ‘stop’ to the left and you haven’t put a bobbin on the winder, the electric winder will start and make a noise.
So, always make sure the bobbin winder ‘stop’ is pushed to the right when not in use.