Originally Posted by
Cari-in-Oly
That's an optical illusion based on how the stitch is formed and what type of thread is being used. it's more pronounced on a zig zag machine than a straight stitch machine, and it's common to all ages of machines not just new ones.
I maintain and service my own machines and will put the stitches from most of my machines up against any high end new machine. Even my low end Juki 27 makes stitches just as nice as my BFFs high end Brother.
Cari
My old Singer Quantum has perfectly straight stitches. The repair guy was amazed at how straight the stitches were. He said that model isn't even listed anywhere. I got it as a special buy when the Quantums first came out. Only a small quantity made. The next batch had different features and didn't sew the same to me. I can't buy the bobbins made for it anymore. The newer Quantums have different bobbins. I did buy a lot of extras when I found they were getting hard to find. Love this machine.