I got one for you. We have a Singer 4622A Merit that has 22 or so built in stitches. Got it at a yard sale for a whopping $3.00 about a year ago.
We don't use it much and when we start to sew ZZ or patterns the stitch width comes out narrow no matter where the width control is set. Then as you stitch with it you can actually watch the stitch width increase till it's at the maximum width.
I've oiled everything that moves on this machine and yet if we let it sit for a while without using it it still does this. Perhaps I'm missing something.
Any thoughts on why it's doing this, or where I might try to oil it?