Members lranger Posted October 25, 2014 Members Report Posted October 25, 2014 I have a new machine, and I am new to using sewing machines, although I have used home sewing machines some in the past. I've had this machine about a month now, and I still can not get it to sew consistently without problems. My question is, "Is it normal, with an industrial walking foot machine, to have to spend all day fooling with it to get it to sew without skipping stitches or raveling the thread? Then, say I manage to get it to sew reasonably well, then I have to work all day on it again, if I just change the color of the thread (different brand), or use a different piece of leather even though it's the same thickness? I just can't believe this is normal, or that every person in the world who sews on a machine all day long has to go to this much trouble and aggravation. Maybe I'm wrong. Keith
Members lranger Posted October 25, 2014 Author Members Report Posted October 25, 2014 I should have attached this photo. I'm trying to sew a purse strap. It's two layers of 2 oz. leather, glued together with a strip if bag stiffener in the middle. Includes a test piece. Keith
Members SARK9 Posted October 25, 2014 Members Report Posted October 25, 2014 You should mention what model of machine you are using, plus the needle and thread size/type. Off the cuff, your thread tensions look FAR too high for your material, and the stitch length looks a bit short. -DC Machines: Juki LU-563, Consew 206-RB5, Singer 20U33, Pfaff 481, Mitsubishi CU-865-22, Consew 29B, Rebadged Juki LU-562, Mitsubishi LS2-180, Seiko SK-6, Juki LG-158-1
Members lranger Posted October 25, 2014 Author Members Report Posted October 25, 2014 It's a Techsew 2700 and I'm using a #16 needle with #69 bonded nylon thread. I tried for a long time to get the machine to sew this material with a #18 needle and #69 thread but it will not even begin to do that. When I changed to the #16 needle I was able to sew the whole bag together OK until I tried to sew the strap. I just tried it again. It sewed 5 inches great, then broke the thread. I started again and it sewed about 3 inches and started raveling the thread again.
Members biglew Posted October 25, 2014 Members Report Posted October 25, 2014 I am not an expert but I agree the tension is to high... check the threading to see that it is in the middle of the tension discs....and didn't slip out and go behind a disc
Members lranger Posted October 25, 2014 Author Members Report Posted October 25, 2014 The upper thread is threaded correctly and is between the two tensioning discs. I have tried adjusting bobbin tension up and down, and the upper tension up and down. My criteria for adjusting tension is; first that it will at least make a stitch, then that the thread is not laying on the surface of the leather either on the top or the bottom, then that the loop is inside the material and the stitches look good on the top and the bottom. How should I be doing it? Keith
Members Constabulary Posted October 25, 2014 Members Report Posted October 25, 2014 probably a needle / hook timing problem or the needle is not insert correctly (slightly angled?)? ~ Keep "OLD CAST IRON" alive - it´s worth it ~ Machines in use: - Singer 111G156 - Singer 307G2 - Singer 29K71 - Singer 212G141 - Singer 45D91 - Singer 132K6 - Singer 108W20 - Singer 51WSV2 - Singer 143W2
Techsew Ron Posted October 27, 2014 Report Posted October 27, 2014 The upper thread is threaded correctly and is between the two tensioning discs. I have tried adjusting bobbin tension up and down, and the upper tension up and down. My criteria for adjusting tension is; first that it will at least make a stitch, then that the thread is not laying on the surface of the leather either on the top or the bottom, then that the loop is inside the material and the stitches look good on the top and the bottom. How should I be doing it? Keith Hi Keith, please give us a call or contact us by email, we'll have a technician troubleshoot this with you today. Thanks, Ron Techsew Industrial Sewing Machines Call toll-free: 866-415-8223 Visit www.techsew.com
Members lranger Posted October 30, 2014 Author Members Report Posted October 30, 2014 I thought I would update this thread in case there was anyone following it. I've been working with Techsew's tech guy but we really haven't found any reason for why this machine skips stitches on this thin leather I'm using. It will sew thicker leathers just fine, and with larger needles and threads. It will even sew several layers of linen fabric, but it won't sew this 2 oz. leather I'm using. Go figure. Keith
Evo160K Posted October 31, 2014 Report Posted October 31, 2014 An amateur thinking out loud here: I think I'm reading the glued strap is the problem, if so could the glue be an issue?
Recommended Posts