Random lose thread cobra class 26

[Alienleather]

When sewing with cobra class 26 I have this random lose threads ! Any tips in how to fix it?

[DieselTech]

I am going say, user error. You probably moved the piece when sewing or it slipped a bit while sewing. 

I am no means a professional & I've only used my class 26 maybe 6hours total. 

Maybe some more experienced pros will chime in. 

[Wizcrafts]

Sometimes, it's the way the thread comes off the spool. SOme thread is twisty. Some is bonded too much or too little, some windings may have crossed over or under other windings, some windings fall down and get caught under the spool. I've had knots suddenly appear on top after laying perfectly in the center. Sometimes, I discover that the top thread has twisted itself around the thread stand and is jammed tight.

Even the bobbin thread can jump out of its position under the tension spring. Or, it could get caught under the bobbin.

[Constabulary]

check if thread keeps hanging on the bobbin case opener