Teres

Will update you how i get on. I get tight but acceptable (not that I'm pleased with) knots with 2-3 layers of standard beta biothane like you describe, my issue is with sewing multiple layers of superheavy but I'm sure a solution would help both to get a nicer stitch.

Thank you for the suggestion Wiz. I spent a few too many hours trying to work out the instructions unsuccessfully, I cant seem to find screws/part shown and listed in the instructions. for example the thread tension adjusting seat screw (A) I cannot find - I can see the seat but its tucked behind the metal body. Do you have a better interpretation than i do of those instructions based on the pictures I've attached? Im new to sewing machines so Im not entirely sure what Im doing. I did some trial and error adjustment based on guessing but i couldn't get any different results so i reversed what i did out of fear of messing too much. Thanks.

Hi, I have a Jack H2 not an ideal machine but i was recommended it and I'm still not entirely sure. Anyway I'm trying to sew biothane for dog leads and I've had many issues so far but by looking at old threads I've managed to sort these out. I am using a size 24 needle and tex 135 bonded nylon both top and bobbin. I am using the larger needle size as i couldnt get the knot to sit in the middle of the biothane and that has fixed it. My current problem is when I try sew 3 layers the top thread will cut into the biothane material but the bottom i can generally get a decent stitch. I have tried adjusting the tenssion in various ways assuming I'd have to loosen up and it does improve slightly but then i start getting loose thread at the bottom. Would someone be able to advise me how I can fix the thread cutting into the material? and perhaps get a nice consistent stitching on both sides? The pictures: The black piece is probably the best I can get it fit both sides - mind my messy work (still trying to get the hang of it) The blue material is me trying to play around with tensions and obviously not getting anywhere but you can clearly see the thread burying into the material. Thanks!