Now I have a good excuse for the very same problem. I did dressmaking for years, but I don't recall having tht problem with seams in general.
I have heard that some sewing machines sew really straight seams, so I am wondering if the feed dogs do not carry the fabric through in a straight line? I started quilting about 7 years ago and soon realized I had this problem. I have tried to keep my mind focused on that bit at the end of the seam, but I come out with that end of the seam narrower than the beginning. I am totally frustrated.
Either I need a new machine (which ones DON'T do this.
or I need a new set of eyes?
So, MarMar, you are not alone with this stupid problem. I flip the piece over and start from the opposite end (sometimes) but it is a general nuisance!
Help!!! June in Cincinnati