Juki 562, top thread gets caught in bobbin tension slit

[Farmfield]

So when going around the bobbin, the top thread at times get stuck in the tension slit. Does anyone know what causes this problem?

Cheers Johnny 

 

 

[CowboyBob]

1 hour ago, Farmfield said:

So when going around the bobbin, the top thread at times get stuck in the tension slit. Does anyone know what causes this problem?

Cheers Johnny 

 

 

Tilt the machine back & on the middle shaft (the one that runs the hook) you see a large gear,loosen the 2-set screws just 1/2 a turn & tap the gear to the right 2-3mm,should fix it.

 

[Farmfield]

1 hour ago, CowboyBob said:

Tilt the machine back & on the middle shaft (the one that runs the hook) you see a large gear,loosen the 2-set screws just 1/2 a turn & tap the gear to the right 2-3mm,should fix it.

What exactly does that do? It feels like that would change the timing..?

[CowboyBob]

1 hour ago, Farmfield said:

What exactly does that do? It feels like that would change the timing..?

Yes, if your timing is slow the take-up lever is trying to pull the thread up before it's all the way around the hook & can cause the problem.

[Farmfield]

24 minutes ago, CowboyBob said:

Yes,if your timing is slow the takeup lever is trying to pull the read up before it's all the way around the hook & can cause the problem.

Hmm, ok, so it's a top-bottom sync issue...

And I could move it 1-2mm, then it started binding up, and it's better, but not perfect. 

I think the bobbin case might be damaged, the edge on the slit is very sharp, almost protruding, so I'll get some fine sandpaper and soften that transition, I bet that'll sort the issue completely. 

I really appreciate the help. :D