Originally Posted by
Tartan
Go back to the shop and have them compare your BSR to another in the shop with them running both. It should not be jerky.
My thoughts exactly. Have them use your BSR on one of their machines. Then have them compare your BSR and one of theirs on your machine.
Did you buy your BSR from a Bernina dealer? I am asking because there are knock off Bernina parts available online. A friend bought a "Bernina" walking foot online which turned out to be a knock off, not a genuine Bernina part, and it doesn't work right. What a waste of money! She ended up buying another one from a Bernina dealer and loves it.