Because the pulling part of the sewing machine is on the bottom, known as the feed dogs, the bottom fabric will almost always pull more through than the top...unless you have the even feed action. This can be from a walking foot, or several of the machines have it built in. I fight my baby Brother...WM inexpensive model... all the time. I have learned that on long, over 6 inch seams, I have to pin some. I, also, catch both pieces of fabric with my fingers, and gently force the bottom to wait for the top and I can still end up a 1/16 or 1/32 off at the end of a longer seam. Yep...it's back to pinning for me. I don't have an even feed foot for this little Brother and without the 1/4 inch foot, I wouldn't use it anyway.
I am going to try the fold method and see if that helps me. I can understand why folding the fabric could work. By the very action of folding the fabric up, you will be forcing the top to feed quicker and will be gently stretching the bottom, therefore helping to keep the seams even. This could be a very good tip.
Last edited by Barb in Louisiana; 04-19-2020 at 07:39 PM.