Is your 401A reluctant .....
...... to sew through denim? Mine will sew all day long through one layer, such as doing decorative stitches, and it will sew through two layers good two. But, when it comes up on a seam where the fabric goes from two to three or four layers, it just doesn't want to sew over it. I have to help the material pass under the presser foot.
I've tried varying the tension on the presser foot, but it doesn't seen to mater. I've tried different feet, doesn't help. The needle plate is all the way down, so the feed dogs are up as far as they go.
I like this machine, but this bugs me.
I have other machines that will sew over 6 to 8 layers of denim without slowing down.
So what I wonder is up with my 401A???
Joe