One of the things I learned from testing new sewing machines was about the dual feed feet. I am in love with the HP2 foot available on the Janome M8 Continental and the Elna 792 Pro Ex. I came home from my session the other day and investigate the dual feed on my current machine.
While it probably comes as no surprise to you, I was a little surprised. Not a lot, because I do encounter the dual feed mechanism periodically.
I went through the manual and came across some notes I made about needle position, so I must have used it before. I tried it out on one of the Enigmas on which I am working. The overall theory worked well, but the width of the foot was kind of a problem.
Also, the foot you see is, presumably, the quarter inch dual feed foot. I had to adjust the needle position because it doesn’t make a quarter inch seam out of the gate. It is possible it is a 5/8ths inch foot or something else, but my recollection is that I bought a 1/4 inch Acufeed/dual feed foot at some point.
Anyway, I tried it out to replicate what I experienced on my testing session and I could sort of. The HP2 foot is narrower and that works better for me on the Enigma bags.
The thickness is really a challenge and on this particular bag, attaching the side panels to the bottom in the zipper area makes for some additional grey hairs.
I might try to use the dual feed to quilt (shock! horror!) the 1-2-3 Mosaic table runner.