Members RickV Posted December 21, 2021 Members Report Posted December 21, 2021 Hello All, We are having an issue with cylinder arm machines as of late. The machine mechanic and myself have been working on the same machine for months and no ground has been gained. The current problem we are having has to do with the tension on the machine. There is tension on the top(too much for our liking) and there is absolutely no tension on the bobbin(we have replaced tensions spring several times) but somehow the thread is being pulled through the bottom of our leather. Its a mystery that we have not been able to solve so i am hoping that someone out there may have some insight as too what can be done to fix it or if its a lost cause. Thank You Quote
Members Dwight Posted December 21, 2021 Members Report Posted December 21, 2021 What brand of machine do you have?? May God bless, Dwight Quote If you can breathe, . . . thank God. If you can read, . . . thank a teacher. If you are reading this in English, . . . thank a veteran. www.dwightsgunleather.com
Members RickV Posted December 21, 2021 Author Members Report Posted December 21, 2021 Dwight, The machine is a Consew227R-2. If it would help any we use the cylinder machines to put the binding on ballgloves. Quote
Moderator Wizcrafts Posted December 21, 2021 Moderator Report Posted December 21, 2021 I have a clone of that machine: a Techsew 2700. If your bobbin thread keeps popping out of the tension spring, reverse the direction of the tbobbin. I usually insert bobbins so they feed against the direction of the slot and spring. This ensures good, controllable tension and keeps the thread from jumping out of its channel. Make sure that both little screws are holding the spring in place. The one closest to the exit position controls the tension. The other one keeps it in place on the case. If you are unable to get adjustable tension in the bobbin case, replace it! Assuming you can gain control of the bobbin tension, check the entire top thread path for kinks or sharp turns, or excessive twisting from overly coily thread. If your thread is too twisty, replace the spool and try balancing the tensions again. Or, counteract the twist using the holes in the top guide post. I do that anyway, feeding through the top hole, bringing the thread around the front, then through the bottom hole. This gives a counter twist to offset any twist in the thread cone. Make sure you are threading correctly according to the manual. Adjust the check spring tension so it only has enough force to bring the spring down against the back stop bracket, wherever it is set to stop the spring. Then adjust the position of the slot to give the best lay of the thread without making a popping sound as it goes around the bobbin case and shuttle. Finally, if you still have trouble with the tension, remove the top tension spring and disks and inspect them for burrs. Ditto for all the guides and even the take-up lever. Do not wrap thread around the pin on the right side of the top disks. It is not there for that purpose. Quote 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.
kgg Posted December 21, 2021 Report Posted December 21, 2021 39 minutes ago, RickV said: If it would help any we use the cylinder machines to put the binding on ballgloves. A couple of questions. How thick is the material being sewn, what size thread (top and bobbin) and with what size needle? A couple photo's of the top thread path maybe helpful along with the item being sewn. kgg Quote Juki DNU - 1541S, Juki DU - 1181N, Singer 29K - 71(1949), Chinese Patcher (Tinkers Delight), Warlock TSC-441, Techsew 2750 Pro, Consew DCS-S4 Skiver
Members RickV Posted December 21, 2021 Author Members Report Posted December 21, 2021 20 minutes ago, Wizcrafts said: I have a clone of that machine: a Techsew 2700. If your bobbin thread keeps popping out of the tension spring, reverse the direction of the tbobbin. I usually insert bobbins so they feed against the direction of the slot and spring. This ensures good, controllable tension and keeps the thread from jumping out of its channel. Make sure that both little screws are holding the spring in place. The one closest to the exit position controls the tension. The other one keeps it in place on the case. If you are unable to get adjustable tension in the bobbin case, replace it! Assuming you can gain control of the bobbin tension, check the entire top thread path for kinks or sharp turns, or excessive twisting from overly coily thread. If your thread is too twisty, replace the spool and try balancing the tensions again. Or, counteract the twist using the holes in the top guide post. I do that anyway, feeding through the top hole, bringing the thread around the front, then through the bottom hole. This gives a counter twist to offset any twist in the thread cone. Make sure you are threading correctly according to the manual. Adjust the check spring tension so it only has enough force to bring the spring down against the back stop bracket, wherever it is set to stop the spring. Then adjust the position of the slot to give the best lay of the thread without making a popping sound as it goes around the bobbin case and shuttle. Finally, if you still have trouble with the tension, remove the top tension spring and disks and inspect them for burrs. Ditto for all the guides and even the take-up lever. Do not wrap thread around the pin on the right side of the top disks. It is not there for that purpose. We have replaced all springs with new parts on 2 different occasions. The issue is that we can have the top tension adjusted to have way more tension than the tension spring on the bobbin, as well as taking all tension off of the bobbin and it is still pulling through the bottom. i will run through these suggestions and double check that the bobbin is in correctly. Quote
Members RickV Posted December 21, 2021 Author Members Report Posted December 21, 2021 6 minutes ago, kgg said: A couple of questions. How thick is the material being sewn, what size thread (top and bobbin) and with what size needle? A couple photo's of the top thread path maybe helpful along with the item being sewn. kgg The materials that are being sewn togethar are as follows Leather-2.1-2.3mm Binding-.8-1.0mm When checking the adjustments we made we are sewing through 2 pieces of leather so the total thickness woule be between 4.2-4.6mm thick. i will follow up with pictures. Quote
Moderator Wizcrafts Posted December 21, 2021 Moderator Report Posted December 21, 2021 Try moving up 1 or 2 needle sizes. A bigger hole takes pressure of the thread knots and makes them easier to pull up. 10 minutes ago, RickV said: The issue is that we can have the top tension adjusted to have way more tension than the tension spring on the bobbin, as well as taking all tension off of the bobbin and it is still pulling through the bottom. Quote 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 RickV Posted December 21, 2021 Author Members Report Posted December 21, 2021 Our current needle size is 135x17 and the thread weight is 135 Quote
Members RickV Posted December 21, 2021 Author Members Report Posted December 21, 2021 This is the top side ^ Quote
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