Twisting, Binding And Breaking Thread

[mmirob]

Just got my Cobra class 4 and am doing my best to learn on it. On occasion while sewing two 8oz leathers, 277 both sides, #24 needle, I notice that the thread twists to the point of creating a knot like twist before the needle eye and when needle lifts from the work it breaks the thread. Are tensions too tight for the leather load? It does not do it every time... Just when I am working on a nice piece )! Always the way it goes I know. What causes the twisting thread. I am using the nylon thread that came with the machine. It is the top thread twisting not the bobbin.

I called Steve, he seemed stumped.

Art, I know you can fix anything! What am I doing wrong.

Rob

Art... I know you can

[mmirob]

I think I figured this out...user error. I missed the threading hole in the the rod that holds the needle. I will report back if this doesn't fix it.

[Luke Hatley]

I think I figured this out...user error. I missed the threading hole in the the rod that holds the needle. I will report back if this doesn't fix it.

And why might, i ask would you not use a smaller thread on the bobbin ?

mine will sew better with 277/207 thread ?

[mmirob]

And why might, i ask would you not use a smaller thread on the bobbin ?

mine will sew better with 277/207 thread ?

Simple, I don't own any. )

[Luke Hatley]

Simple, I don't own any. )

Come on over to Memphis and i will wind you a few Bobbibs full..........I'm only 2hrs away ....if you drive fast.

Edited July 18, 2010 by Luke Hatley

[mmirob]

Come on over to Memphis and i will wind you a few Bobbibs full..........I'm only 2hrs away ....if you drive fast.

Thanks! I've paid state trooper salary making it in two hours! lol

[dirtclod]

First thing i would try is putting a new needle in and see if that helps. Is the needle in with the groove to the left ? Is the needle the right size ?

If you have tried all of those i would loosen the tension up and try to sew on a piece of chap leather folded and slowly tighten the tension till had it sewing fine on that. Then it should male a nice stitch on ever thing else.

Just a couple of days ago i went and took a look at a guys machine it was breaking the thread and skipping stitches and he had the tension screwed as tight as he could get it on the top and bottom. Loosen them up and then seen he had tightened the bottom so much it had caused a spring to come unhooked. Fixed the spring it sewed fine.

One those might help or might not.

Edited July 18, 2010 by dirtclod

[CDragonworks]

Sometimes it is the twist of the thread... they come in Rt and Lft twist...You need to make sure you have the right thread for your machine! Hope this helps...

[mmirob]

Sometimes it is the twist of the thread... they come in Rt and Lft twist...You need to make sure you have the right thread for your machine! Hope this helps...

May ba a silly question but how do I know what thread I have and does anyone know what a Cobra class 4 requires??

[ShortBBL]

I'm curious if this was BLACK 277? My white works flawless, my black is not bonded properly I think, as it kinda looks gooked up and stuff scraps off it when its sewn. It did exactly what you are describing.

So tell us... what color was this?