The info starting at 10:15 is really important to understand the dynamics of how the sewing machine makes a knot and why PTFE threads have "issues". The needle (with thread) descends and punches (or cuts in the case of a DI needle) a hole in the fabric. At the bottom of the "stroke" the upper thread tension discs then open allowing the thread in the needle to go slack. As the needle rises and withdraws from the hole in the fabric, the fabric will close , gripping the thread and preventing it from withdrawing. The slack thread near the bobbin forms a loop for the rotating shuttle to catch and create a the knot using the bobbin thread. If the hole in the fabric is too large ( needle size too big) or the the thread material is slippery (PTFE), the needle thread may pull out of the fabric on the upward stroke. No loop is formed and therefore no knot. (missed stich). My two cents.
Used Sailrite PTFE thread on my sail shade and i'm glad I did. Sure, there's some skipped stitches but the webbing will never need to be resewn and you can't even see the skipped stitches once the shade is hanging up.
I was considering using this on my new sail kit. Glad I opted for V92 polyester. I'm wondering how this thread performs on a rotating hook machine and on sail fabric? Also those are great tips that apply to regular thread too. Sailrite, you guys are the best!
Would be great if this was mentioned up front in the Ultrafeed Guide book under skipped stitches before recommending tedious and unnecessary machine adjustments...!!!
Wish there had been more problems to see how the tension was adjusted. Because the setup was so good I never got to see the tension problem solving. :-(
Use a walking foot industrial machine, and you will not have skipped stitches. Plus, you don't make ptfe thread, you are rebranding the thread with your name...
wow... sewing professionally since 1979 and I wouldn't call the Sailrite LS a "converted domestic machine"!!! Of all my machines (Singers111w, 70U and 241 and Consew 2206rb-14-7-dd) my Sailrite is the only TRUE WALKING FOOT! The back feet on the rest, just go up and down. on the LS, the back foot truly WALKS... in fact, the first time you use it, your eyes need to adjust!!! (kinda scary, really!)
The idea of skipped stitches on a lifetime project doesn't appeal somehow. I think this confirms that the very excellent Ultrafeed machine has it's limitations and is best kept as a stowable tool for repairs or projects that don't need lifetime thread.
The info starting at 10:15 is really important to understand the dynamics of how the sewing machine makes a knot and why PTFE threads have "issues".
The needle (with thread) descends and punches (or cuts in the case of a DI needle) a hole in the fabric. At the bottom of the "stroke" the upper thread tension discs then open allowing the thread in the needle to go slack.
As the needle rises and withdraws from the hole in the fabric, the fabric will close , gripping the thread and preventing it from withdrawing. The slack thread near the bobbin forms a loop for the rotating shuttle to catch and create a the knot using the bobbin thread.
If the hole in the fabric is too large ( needle size too big) or the the thread material is slippery (PTFE), the needle thread may pull out of the fabric on the upward stroke. No loop is formed and therefore no knot. (missed stich).
My two cents.
Used Sailrite PTFE thread on my sail shade and i'm glad I did. Sure, there's some skipped stitches but the webbing will never need to be resewn and you can't even see the skipped stitches once the shade is hanging up.
I was considering using this on my new sail kit. Glad I opted for V92 polyester. I'm wondering how this thread performs on a rotating hook machine and on sail fabric? Also those are great tips that apply to regular thread too. Sailrite, you guys are the best!
Would be great if this was mentioned up front in the Ultrafeed Guide book under skipped stitches before recommending tedious and unnecessary machine adjustments...!!!
Wish there had been more problems to see how the tension was adjusted. Because the setup was so good I never got to see the tension problem solving. :-(
Hello, what is the best needle size and thread if you're working with ripstop fabric .Thanks
You must have seen Desiree's video from project Atticus. She had problems with this stuff on her Ultrafeed.
Adler will run ptfe fine
Use a walking foot industrial machine, and you will not have skipped stitches. Plus, you don't make ptfe thread, you are rebranding the thread with your name...
I don't understand why not use an industrial walking foot machine. Why a converted domestic machine, and why not just use kevlar thread.
Aramid thread is very expensive
Kevlar isn't very resistant to UV if it's under sun a lot like in sailing.
wow... sewing professionally since 1979 and I wouldn't call the Sailrite LS a "converted domestic machine"!!! Of all my machines (Singers111w, 70U and 241 and Consew 2206rb-14-7-dd) my Sailrite is the only TRUE WALKING FOOT! The back feet on the rest, just go up and down. on the LS, the back foot truly WALKS... in fact, the first time you use it, your eyes need to adjust!!! (kinda scary, really!)
The idea of skipped stitches on a lifetime project doesn't appeal somehow. I think this confirms that the very excellent Ultrafeed machine has it's limitations and is best kept as a stowable tool for repairs or projects that don't need lifetime thread.
Haberdashery