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sewing machine question

swampsnyper

swampsnyper

Well-Known Member
Joined
Mar 10, 2015
Messages
4,463
Location
Warrior, Al
Why do I keep getting skipped stitches? Its not picking up the bobbin thread every time. PITA when you got a box x going then have to rip it out because it missed 3 or more stitches in a row. I haven't completed the first box yet!
 
Bobbin tension too tight maybe? I'm no expert on troubleshooting them thats for sure. I had to mess with the tension on mine for a good while before it was right!
 
Make sure your needle is big enough for one, the top tension is easier to adjust than bottom so check that out. Finally, you can check your hook timing. If your tension and needle are slightly off and the timing isn't perfect, it's makes for a perfect storm that can cause skipped stitches.

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Its a 15-91. Its a new needle, sized for the thread. It doesn't do it as bad just practicing on a single layer of webbing. I've played with the foot tension, top tension and bobbin tension and I never see a difference in the stitches. I was hoping to see it change so I could find the right spot but no change and they look pretty good to me as a rookie. I tried watching the timing with no material and just hand cranking. I watched it pick up the bobbin thread. Not sure what the right timing should look like.
Also the machine strains when I try to start a stitch on webbing, before needle even touches the webbing. I have to help it by hand or give it the juice. I was hoping it would go easy and slow. I just opened up the motor and polished the control board clean and brushes. Still straining even before the needle hits the material. Runs smooth on light stuff. So I loosened the foot pressure thinking thats whats binding. Didn't help. I need someone who knows what they are looking at to be here with me. Its probably easy adjustments on my part. I'm pretty good at figuring out how things work and watched a lot of videos but I'm stuck. I even changed out the old wiring and put a new foot control pedal on.
 
Hmmm I'm getting closer on the skipped stitches issue. Its a tensioning problem I think. Its getting better as I play with it.
If I go from 2 plys to 3 plys, What should I do with tensioning? Loosen?
 
I think I may have my bobbin feeding the wrong direction. Watched a few YouTube videos and they didn't agree with each other. Maybe I followed the wrong one! Lol
 
Did you get this figured out? I have a manual around here somewhere I think from the 15-91 I owned for 3 days.

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It's the shuttle point that's not grabbing the top thread off the needle. I'm not sure if it's because the material is to thick and not letting the thread slack enough as the needle rises up so the shuttle point can grab it to spin around the bobbin or the shuttle point it worn. I ordered a new shuttle point anyway. Timing looks good. May be too thick of thread? It's #69 and 18 needle. It won't catch the thread every time leaving skipped stitches which makes sewing useless. It works fine on single layers of webbing but that's not why I bought the machine. I've put too much money into it to still be at ground zero.
Maybe it will just have to be a hammock making machine.
 
I hope you have better luck than I did. I got rid of mine and bought a walking foot machine for the same reason. My 15-91 kept skipping stitches. It was a bit more money but I haven't found anything my new machine won't sew through. New of course to me, it's actually 70 years old.

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Wish I would have known that. I'm so frustrated with it, I'm about to throw it in the trash! I did buy a walking foot attachment but never put it on.
 
I ended up buying a 111g156 from a car restoration place that used it for the upholstery. I paid 500 for it but have put money into it to upgrade the motor to a servo motor. And I welded up new a new drive pulley to lower speed and increase power. If you look , you can see the smaller original pulley on the table.
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Lol If things go the way I want them to, I am shopping for a box tacker next. Right now my boxes look pretty bad. If I get one, I'd be happy to help

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Got the new shuttle in and replaced the old one. It still misses the thread on the needle with 3 layers. I kept playing with it and noticed on the up stroke the webbing and foot would lift. This was stopping slack from forming on the up stroke so the shuttle could catch it. I had loosened it because the motor was straining on start up before it would even touch the webbing so I thought it was the feed dogs in a binde. That wasn't the issue. I added pressure to the foot and now the material doesn't lift on the up stroke and it stopped skipping stitches.

Stitched up 3 layers and it's looking good!!!
 
swampsnyper said:
Got the new shuttle in and replaced the old one. It still misses the thread on the needle with 3 layers. I kept playing with it and noticed on the up stroke the webbing and foot would lift. This was stopping slack from forming on the up stroke so the shuttle could catch it. I had loosened it because the motor was straining on start up before it would even touch the webbing so I thought it was the feed dogs in a binde. That wasn't the issue. I added pressure to the foot and now the material doesn't lift on the up stroke and it stopped skipping stitches.

Stitched up 3 layers and it's looking good!!!
Click to expand...
I liked your solution from 5 years ago. Still good information.
 
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