Members Clintock Posted June 16, 2018 Author Members Report Posted June 16, 2018 (edited) Needle is in right. @Evo160K groove on left and flat spot on right @JLSleather sposed to be a wrap anna half. And it is. Or am is it sposed to wrap around that post that it's going over too? Btw this is cowboy brand 277 on top and bottom. Thinking I may go to a smaller thread on bottom. Edited June 16, 2018 by Clintock
RockyAussie Posted June 16, 2018 Report Posted June 16, 2018 If you are sure it is coming through the thread path on top without any tight and loose happing as you pull it through have a look and make sure that your foot pedal is not letting the spike that separates the tension discs at the back touch. If there is no gap from the discs it may be enough in operation to make the tension loosen and tighten a little. Make sure your foot pedal where it hinges is moving freely because if it gets caught up it could be holding the tension discs apart as well. Wild Harry - Australian made leather goodsYouTube Channel Instagram
Members Clintock Posted June 16, 2018 Author Members Report Posted June 16, 2018 @RockyAussie checked and good.
Moderator Wizcrafts Posted June 16, 2018 Moderator Report Posted June 16, 2018 It could be a problem with the leather varying in density as you sew. Or, the bobbin thread could be getting twisty, forming microknots as it passes under the tension spring. Posted IMHO, by Wiz My current crop of sewing machines: Cowboy CB4500, Singer 107w3, Singer 139w109, Singer 168G101, Singer 29k71, Singer 31-15, Singer 111w103, Singer 211G156, Adler 30-7 on power stand, Techsew 2700, Fortuna power skiver and a Pfaff 4 thread 2 needle serger.
Members Clintock Posted June 16, 2018 Author Members Report Posted June 16, 2018 @Wizcrafts there is a little "pop" when stitching. Always thought it was the thread popping as it came over the bobbin. The leather is WC 7/8oz glued and doubled. I believe I may have most of the knots worked out. Doesn't do it every other stitch now but sometimes. I adjusted the tensioners a little. Is there anyway to "reset" the tensioners?
RockyAussie Posted June 16, 2018 Report Posted June 16, 2018 It looks like you have your thread return spring held at the uppermost height in the picture. Does the thread start to go slack at the needle just as it is entering the leather? That is what it should be doing and It may make some difference. When you say you adjusted the tensioners a little what do you mean? The tension disc adjustments or the foot pressure or the bobbin spring or? Wild Harry - Australian made leather goodsYouTube Channel Instagram
Members Bugstruck Posted June 16, 2018 Members Report Posted June 16, 2018 You could try running the top thread through the upper tension then back through the eylete before descending to the lower tension. One of the clone vendors recommends that path to keep the thread well secured in the upper tension. I have had your experience and tried that alternate thread path with success one one occasion. The thread angle from the upper tension to lower looks agressive using that path but it has not caused me any issues.. Worth a shot. Sometimes the thread looks well seated in the upper tension but isn't. I don't know this but suspect the issue occurs when releasing foot pressure for turns or other reasons. The clones and presumably the Juki start releasing upper tension nearly as soon as the foot starts lifting, so you don't have a release delay there like many of our machines. Nothing wrong there, just how it is engineered, and the top of the discs stay tight which helps keep the thread where it belongs and engaged. Does ride up on rare occasion though and can give your results.
Members Bugstruck Posted June 16, 2018 Members Report Posted June 16, 2018 I should clarify, they do have a tension release delay but not as late in the lift as many machines. My experience.
Members Clintock Posted June 16, 2018 Author Members Report Posted June 16, 2018 @RockyAussie not sure what piece you're talking about that's at the uppermost point. thread does go slack just as needle penetrates leather. Since most of the knots were on bottom I adjust the discs. Going tighter up top till knots starting showing more on top then slacking off till the disappeared in the leather. They may not be right and the tension might be off but it's better now. Mostly does it in a curve now or a sharp corner. @Bugstruck I've seen a video on that or read it somewhere. Never give it a try but I guess it wouldn't hurt. Will double check to make sure disc are closing fully when foot is down.
Members Bugstruck Posted June 16, 2018 Members Report Posted June 16, 2018 I was in the middle of a post and lost it. Tablet is squirrelly.... The wide range of thread our machines throw has an impact on tension release point. I usually sew 207 so that is what I was commenting, occurs fairly low. Run 346 and the release point is higher, closer to what we see on the narrow thread range machines. We ask a lot of these clones and they do a good job. What Rocky Aussie meant I think is the thread tension spring should seat on it's built-in rest just as the needle enters your material.
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