I guess I should weigh in on this topic since I opened the whole wonderful can of worms of doing ruler work on domestic machines in the first place.
First, I am not a Bernina user and the tute was done by a Bernina educator, Reneah Rafferty.
The
tutorial on my blog that Jill refers to indicates that you can use the Janome foot on the 77 adapter shank. From there, I think the rest is just fooling your machine (if computerized) into thinking it's got a different foot on and getting the needle into the center of the ruler toe by moving the needle position. You also may need to adjust the presser foot pressure. (The Janome foot is height adjustable also) I do not know if this will work on all Berninas.
I have seen the video that Lisa Calle shot of Terri Lucas doing ruler work on several Berninas. They used regular free motion feet. I have never recommended that you do ruler work with a regular FMQ foot. It can be done, but I don't want to be responsible if the ruler slips over or under the foot. It will certainly break the needle and can throw the machine out of time. If you use a regular FMQ foot, make sure to go slowly.
Ruler work is a slower process than regular free motion and the extra care needed for doing it without a ruler foot might drive a person batty.
There are a few 3rd party ruler feet now available--- for Berninas, both that I know of use the 77 adapter. Parrs Reel Ruler is out of the UK and is a hopping style foot. It is not a 1/4 type foot (ie a 1/4 inch from the needle to the outside of the foot) which can be an issue for line spacing. They did this so it works with their own line of rulers better. Westalee from Australia has developed a true 1/4 inch ruler foot (and their own line of rulers for it, but you can use it with other rulers) and they will have an American manufacturer too, so the price might be more reasonable once that is finalized. I am waiting for my sample to come in the mail so I can try it.
Also, the new Bernina long arm machine has a ruler foot and the long arm is also supposed to use FM feet from regular Berninas, so I assume that means the ruler foot can be used on a regular Bernina.
Of course, you can modify your own foot as above!
Ruler work is such a great technique and I hope everybody can source a foot for their machine and give it a whirl. There are several videos on ruler work on this
youtube playlist.