Members Clintock Posted June 15, 2018 Members Report Posted June 15, 2018 I cannot figure out what is wrong with this machine. It's sewn one holster and I've played around on scraps a bit. The (locking knot?) keeps showing every other stitch. Sometimes on bottom sometimes on top. Here's a pic of what I mean. I've taken the bobbin out and respooled it. Making sure it's laying flat and the thread doesn't stick out the side hole. Installed it making sure it's turning counter clockwise. Cut the thread off at the spool and re threaded making sure I went through each keeper or hole etc. I have not adjusted any tensioners on the machine. Honestly I'm scared to for fear of not getting it back where it's supposed to be. I know it's nothing major but I can't justify spending that much money on a machine just sew test runs. Any help would be appreciated!
Members Clintock Posted June 15, 2018 Author Members Report Posted June 15, 2018 I cannot figure out what is wrong with this machine. It's sewn one holster and I've played around on scraps a bit. The (locking knot?) keeps showing every other stitch. Sometimes on bottom sometimes on top. I've taken the bobbin out and respooled it. Making sure it's laying flat and the thread doesn't stick out the side hole. Installed it making sure it's turning counter clockwise. Cut the thread off at the spool and re threaded making sure I went through each keeper or hole etc. I have not adjusted any tensioners on the machine. Honestly I'm scared to for fear of not getting it back where it's supposed to be. I know it's nothing major but I can't justify spending that much money on a machine just sew test runs. Any help would be appreciated! As you can see in the pics it's not all the time. And on this piece of scrap it's mostly on the bottom With only only one row being on top.
Members dikman Posted June 15, 2018 Members Report Posted June 15, 2018 Type of machine? Machines wot I have - Singer 51W59; Singer 331K4; Seiko STH-8BLD; Pfaff 335; CB4500. Chinese shoe patcher; Singer 201K (old hand crank)
Members Clintock Posted June 15, 2018 Author Members Report Posted June 15, 2018 Thought I put it in the tags. It's a cowboy 3200
Members dikman Posted June 15, 2018 Members Report Posted June 15, 2018 My first thought is something in the thread path is causing the tension (probably upper) to vary slightly during stitching. Can you attach a photo showing your thread path? (It will help the more experienced here to diagnose the problem). There can't be too much wrong. Machines wot I have - Singer 51W59; Singer 331K4; Seiko STH-8BLD; Pfaff 335; CB4500. Chinese shoe patcher; Singer 201K (old hand crank)
Moderator Wizcrafts Posted June 15, 2018 Moderator Report Posted June 15, 2018 I would watch how the thread uncoils off the spool. Maybe it is hitting sticky spots, then loosening, then grabbing? Twisty thread can also cause the knots to move. I also recommend that you wind a different bobbin with the same thread and see if the problem persists. Some bobbins have a longer end to end profile than others. Over-length bobbins squeeze the bobbin thread against the shuttle driver frame at certain points of rotation, as the thread feeds out. I I've actually had to sand down and polish a few over-length bobbins for my harness/holster stitcher. 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 15, 2018 Author Members Report Posted June 15, 2018 Here's the thread path pics
Members Clintock Posted June 16, 2018 Author Members Report Posted June 16, 2018 I've tried it now with 3 different bobbins. I've watched the thread uncoil while I was stitching. It's coming off fairly easy. And not hanging up anywhere. It's crazy cause it started it outta the blue.
Contributing Member JLSleather Posted June 16, 2018 Contributing Member Report Posted June 16, 2018 Isn't the thread supposed to wrap around this disc all the way, THEN go up over the pin?@ "Observation is 9/10 of the law." IF what you do is something that ANYBODY can do, then don't be surprised when ANYBODY does.
Recommended Posts