LaterDaisy

I have a new to me Adler 467 with a servo motor. I have been making some simple handbags. When I get to the seam, it does not want to sew over it. It seems to get stuck. The leather I am using is 2.5-3 oz, so it should go over it. I am new, so I am sewing slow. Would going faster help? The stitches on the back also look a bit tight, but I have no idea how to adjust the tension. Thanks for any advice! Daisy