HI everybody, I'm new to machine sewing but love machinery generally and am loving making curtains etc from up-cycled fabric and have made a vest and repaired a few of our towels using an late fifties/early sixties Jones CBD straight-stitch machine. However, I'm trying to finish making a pair of double thick curtains made from an old fancy queen-size duvet cover and when stitching the tape to the top hem, so 4 layers of thin cotton plus the tape, the bottom stitch is often missed with one big bottom stitch and when starting, the bottom cotton is very tangled Also, the material feeds in very jerkily at times. I've not adjusted anything but after looking at the hook timing in the bottom thread it is a smidgen out but equally, it has been working fine and still does so on thinner material. After looking online, I think it may be that I need to adjust the presser foot pressure which is currently set on 3.5, down to 1.00 for the thicker bits and then I need to reset it for the areas with less thickness. Am I wide of the mark? Mad? Deluded? A danger to sewing machines?
Thanks for reading