Hello Everybody! My husband and I are starting up a custom sandal business and for months we have been struggling with the stitching on our sandal straps. We use about a 3 to 4 oz leather, fold it in half and do the stitching which we have, most times, no issues with it. The part that we are just having issues with is we take the folded-in-half strap and put another 3oz or so leather on top of that to do the box and the "X" on it for the thong part of the sandal -- so we essentially connect the two straps, which are folded in half and sewn, and bond them by another 3 oz or so leather piece and sew the two straps together.
We have an INDUSTRIAL STRENGTH HEAVY DUTY SINGER 206K SEWING MACHINE *SEW LEATHER*** that we were hoping could do the job but I am at my wits end with it and frustrated of trying to adjust the tension on it or getting new sewing needles which we are using Schmetz Leather Needles Size 16/100 . We have to hand turn the machine while doing the box part and the "X" because it won't go on its own and it either skips stitching or it won't stitch at all! It ends up that I have to hand sew that part of the sandal which is really time consuming. I am sorry if this is a silly post but I have never sewed before and I am so lost at this. Is there a good possibility that I need a different sewing machine for leather? Thank you so much for your time in this matter and I would appreciate any feedback you could give me. If you think I need a new sewing machine, is there any recommended ones that you could suggest to me without breaking the bank ? All we really need the sewing machine to do is handle different material from leathers to hemp to do the straps of our sandals. Thank you, Thank you for your help. I am just so lost of where to go.
*** I included an attachment which is the picture of our sandal with the box and the "X" that I am having issues with. LJR