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MelAnn

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  1. kgg -- I can't thank you enough for all this invaluable advice! I was using the Groz-Beckert needles and you're correct, it''s DPx17. I will buy the DPx16 and see is that helps. You mentioned that you prefer Schmetz - i use those for my other machines, but do they fit in the Techsew 2750 or Juki LS-341? thanks again!
  2. thanks! I'm not sure it's 135x17; I'm using the needles that came with the Techsew and it says "D8x17" (18/110). In fact ALL of the needles they provided were D8x17 (some with size 110 and some 120). Therefore I thought this was appropriate. Also, I looked up another thread chart that said for 92 you can use either 110 or 120. I'll try the 120 but can this really be the problem? and finally, i'm not sure what you mean by "you need 2 1/2 times the height of the thread spool" - can you please clarify? thanks so much! Mel
  3. Dear kgg - thanks so much for your response. I am 100% sure that the machine is threaded correctly (I do it exactly as the instructional video from techsew and anyway it was working fine before), and that the needle is inserted properly (with the scarf on the right, aligned perfectly perpendicular to the direction of stitching). I'm using size 92 thread, with 135x17 needle, size 18/110. I'm sewing leather (mid-weight, 1-2 mm) and the skipping stitches problem started about a month ago (before that, the timing had to be readjusted frequently which was very frustrating). I have re-checked the timing and I'm sure that's good. The video above by Gulrok (posted 6/28/2020) was super helpful for that. After all this checking and fine-tuning yesterday, the skipping is less frequent, but now like every 10th stitch instead of every 3rd. It's so frustrating. And advice you have would be greatly appreciated!
  4. I have the same issue with skipping stitches. Since I bought the machine almost a year ago, I've had constant problems. I have become adept at changing and testing the timing and needle position because that's what the technician (when I called and we video chatted) taught me to do. (As a side note, I can't believe that they don't give you better insight online how to do this - they just give a measurement of how far the needle post needs to be and if it's off by 0.1 mm then you're screwed. They could have had an instructional video to show people where it needs to be when it hits the bobbin.) Anyway, that TechSew service guy was grouchy and condescending, and would say things like "make a video of yourself threading the machine and then send that to me and then I'll talk to you". When he finally saw this issue about the needle timing, he told us the logical way how to do it (when I say 'us' I include my husband who could also not figure it out, and we both are PhD engineers who are quite good at all things mechanical!). Anyway, if anyone can help, we have checked timing, needle size, new needles, etc, and the machine skips a stitch about every 3rd stitch. I cannot find anything helpful online about this. I have resorted to my $200 Singer Heavy Duty machine for lighter leather projects because it's reliable.
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