Bobbin Issue - Juki 1541S

[brmax]

Yes its always good as you say to remove the bobbin case, and clean it out. 

That bobbin case holder; it has the finger on it. This may need reset from the bottom side with its screw. In some situations a different one can be obtained. One has to remember these holder/finger surfaces require care, and spacing. Some aftermarket special parts may have a bit different /finger. This could be discussed, I'm not familiar with aftermarket or custom  

Is there an engineers manual at your location, handy. An ops manual is also a benefit but some items are better illustrated in these others, including a parts book. 

Good day

Floyd

Edited August 22, 2019 by brmax

[Gregg From Keystone Sewing]

4 hours ago, pmreed said:

 Can anyone be more explicit about what the ultimate fix was? This shouldn't happen to a brand new machine.

See attached, this is a known issue on this model Juki DNU-1541S.

Juki DNU-1541S Hook Supporting plate install and adjusting.pdf

Two ways to fix this; heat the existing hook supporting plate red hot and hit it with a hammer to bend into place.  This part will break and not bend if you hit it without heating it.

Another is to get and modify say a Consew 206RB supporting plate, and use that one instead that can be 'adjusted' by bending it closer to and from the hook.  

Edited August 22, 2019 by Gregg From Keystone Sewing

[pmreed]

Thanks, Bob!  I think that things loosened up, in transit, and the T135 thread completely bound up and threw the timing out of whack.