My introduction: I am new to this forum. I have been sewing for about 5 years and would consider myself a flailing beginner. I do fine, but have no idea what I am doing half the time. I’ve just signed up for a sewing class – I really want to learn how to put a zipper in properly! I have a Pfaff 7122 (I think that is the number) that is about 30 years old. It was my mother’s – she is now deceased, so I plan to keep it forever.
My machine has started to skip stitches. I have been sewing on t-shirt fabric. Prior to that, I was using a silk brocade and it was fine. Is this possibly a tension issue? If so, is the problem likely to be with the bobbin? Tighter tension, I assume?
I just had my machine serviced about 2 months ago.