Jimbob Report post Posted June 19, 2011 Just an update on my Singer 211-155.........got her going again, thanks for the info Wiz....dropped the needle a bit....hook starting partially to pick up bottom thread, then needle back to zero....dropping needle bar a tad....almost got the bottom thread....bit more, about 1/16th above the hook when coming around and BINGO...bottom thread picked up every time! Sews like a champ now, every now and then it seems like it has to much top tension....for about 2-5 stitches....then little knots disapear back into leather...adjusting tension (looser) will get top thread back into stitching holes....but then after a few inches it does that again....!? nothing major and I could live with that.....but wonder what causes that. Now here is a question, is there a spring supposed to be inside the bobbin case....like some house hold machines have! Mine does not have one.....could this be a reason...? Well, so much on the update, thanks for all info and "Wizdom".... Greetings James Quote Share this post Link to post Share on other sites
Wizcrafts Report post Posted June 19, 2011 The variance in knot position could be caused by the way the thread is feeding off the spool. It should feed straight up, without getting caught under other windings. Then, the thread should go through a post on top of the machine, then around the three hole post just before the top tension disks, and onward around the check spring, etc. The bobbin should be inserted so that the thread makes a sharp turn back through the slit leading to the tension spring on the case. There should be a modicum of bobbin tension, which you balance via the top tension disks. Also, the wrong needle size can impact the knot position. Try one size smaller needle and increase the top tension to compensate. Quote Share this post Link to post Share on other sites
Jimbob Report post Posted June 19, 2011 The variance in knot position could be caused by the way the thread is feeding off the spool. It should feed straight up, without getting caught under other windings. Then, the thread should go through a post on top of the machine, then around the three hole post just before the top tension disks, and onward around the check spring, etc. The bobbin should be inserted so that the thread makes a sharp turn back through the slit leading to the tension spring on the case. There should be a modicum of bobbin tension, which you balance via the top tension disks. Also, the wrong needle size can impact the knot position. Try one size smaller needle and increase the top tension to compensate. Thanks Wiz.... Been using orange thread on a 2 oz spool.....the small spool may have something to do with it...!? Other then that I feed exactly as u told.....will try Smaller needle.....see what that does! Do u think there should be a flat spiral spring inside the bobbin case....right under the bobbin...? Fixing to finish a killer seat for a friend.....if a man just had more time.....these 12 hour swing shifts are not made for people with lots of hobbies...hahaha... Thanks for all.... James Quote Share this post Link to post Share on other sites
Wizcrafts Report post Posted June 19, 2011 (edited) Thanks Wiz.... Been using orange thread on a 2 oz spool.....the small spool may have something to do with it...!? Other then that I feed exactly as u told.....will try Smaller needle.....see what that does! Do u think there should be a flat spiral spring inside the bobbin case....right under the bobbin...? Fixing to finish a killer seat for a friend.....if a man just had more time.....these 12 hour swing shifts are not made for people with lots of hobbies...hahaha... Thanks for all.... James James; If the small spool is on a peg and is feeding directly inline, then it might be causing the stitch position problems. See if you can set it on the thread stand, or on the top of the table, then feed the thread up to the top of the machine, then onward. The spider spring is an anti-backlash spring, used in high speed sewing to prevent the bobbin from floating in the case and unwinding its thread. If you insert the bobbin against the direction of rotation, it won't usually need the backlash spring. If you have a AB spring, try sewing with, then without it. Also, try using a different bobbin. I have had some bobbins that got a little bent, or have a metal gouge near the outside. These bobbins tend to cause intermittent tension problems. I throw them out as I discover their anomalies. I try to keep a couple dozen bobbins on hand. Edited June 19, 2011 by Wizcrafts Quote Share this post Link to post Share on other sites
