Good point Cari!

Hate to ask a dumb question but what is a serpintine stitch?

Is it possible the sewist was doing a FM serpentine with a straight stitch machine? I would think that type of motion would be bad for any walking foot. Since I always use a straight stitch only machine for sewing on bindings, that is the first thing I though of, so I agreed with the "know it all".

It took me a bit to realize everyone else was talking about doing a decorative stitch with a swing needle machine :)

I use my Bernina walking feet on zigzag all the time. Never any problem.

I sure don't see where the side to side motion would make a difference if it did my walking foot would be shot as I quilt most all of my charity quilts with the serpentine stitch in the ditch using my walking foot A stitch where the foot has to move backwards may be different I never thought of it but I am not sure the foot even moves I think it is feed dogs moving and side to side only the needle moves. HOW INTERESTING

Ridiculous. I use my walking foot for CURVED straight line quilting ALL THE TIME. Constantly. It's my favorite straight line quilting.

See all the curves? Walking foot!

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Oh, no! The quilt police! Actually, with some machines what she says is true. You can't even go backward. With other machines, however, are very happy to sew any fancy stitch you have.

And maybe she is correct. It walks straight. I think I would go to the manufacturer for the best answer. It might not ruin your foot but it might stress the post it is attached to.