Hey there, I might not be using the correct terminology so pardon me.
I recently bought a Cobra Class 26 (JUKI 341 Clone). I have an intermittent thread binding issue, notable by its popping/crackling noise when the bound thread is released and causing the thread to jump back and fray.
I'm running size 138 thread with a 135/16 size 22 Schmetz needle. I've tried adjusting the timing, retarding, advancing and setting it spot on and this issue persists. I've also tried adjusting the bobbin and needle tension.
This issue occurs all throughout the sewing process, not just in the starting phase.
Any potential solutions would be helpful! I took a video and linked to it below