I definitely mean seam length. The application would be for Y-seams, so I potentially wouldn't need to draw a dot at every y-corner, of, say, a hexagon. If you start sewing at a quarter inch into the seam seam and then the machine automatically sews a seam of the right length, the machine should theoretically sew to a quarter inch from the end of the fabric and stop. I saw a You Tube of someone doing it on a Janome (
https://www.youtube.com/watch?v=b4o8-zQJcnU). Only certain Janome's support it automatically. It can be done on the Pfaff 7570, which is my machine with the embroidery feature. The programmable seam length may be an embroidery feature, I don't know. My 7550 does allow programmed stitch sequences, but I was having trouble getting it to work with straight stitches, so I wanted to know if anyone has done it.
Thanks!