Singer 45k problem

[Constabulary]

I have edited the pic a bit... ah... well... I´m not sure but is your bottom thread going trough the needle eye??? That would surprise me... But could just be the angle 🤔

 

Edited March 9 by Constabulary

[Bosko90]

Hmm through the eye? No, but it would be possible for the needle to go through the thread.

I have a friend who has an Adler 4-2, at the first opportunity, we will try it with his shuttlehook.

ok was uploaded to yt. 

And here are some photos. In the photo you can see the moment when the lower thread becomes very tight and the thread is pulled out of the bobbin. This is the moment when the needle is in the completely lower position.

At that time, the upper thread is completely relaxed and does not affect the lower one. In the second photo, the appearance of the upper thread at the same moment.

In the last picture we see how a slight loop is made on the lower thread. This is at the moment when the upper thread starts to pull upwards. It pulls until it uses up this excess thread. And this is at the moment when it already looks out of the 2mm leather. This way, the lower thread offers absolutely no resistance to pulling, no matter how tight the tension screw is. And as I mentioned before, if I lightly press this loop against the bobbin case with my finger to hold it in place, it makes a nice stitch.

[Constabulary]

I at least can see that here is a thread guide missing.

Have you cheeked the needle hook timing especially the needle bar height?

 

Edited March 9 by Constabulary

[Bosko90]

Ok, that's what's missing. But I don't think there should be any problems with that, or?
I didn't check the timing specifically because it's grab thread, and I don't even know the exact position for this machine, what it should be. There is one thing that is still wrong and I can't fix it, that's the only thing I suspect could be wrong. The hook goes too close to the needle and it slides on it. I recently got about 40 needles, all of which are worn down to the point where they have a bit of a flat surface on the side. The needle I'm trying with is new.

I tried to move the entire lower system, but it was unsuccessful, probably the corrosion was too strong.

[Bosko90]

One more video. Focus is little bad it is hard to have phone in one hand and spining machine.

 

 

[shoepatcher]

Loosen the lock screw on the spring and see if you can tighten the regular screw on the spring to increase the tension.  Spring is up and seems to be catching on the thread.

glenn

[Bosko90]

This one doesn't have a lock screw, but I know yes, some have it. I tightened it practically all the way and there's no difference. Do you mean this gap? Hmm, maybe the spring is really bended. That must be flush with housing? 

[shoepatcher]

yes the gap on the spring to the bobbin case.  spring should fit tighter.

glenn

[Bosko90]

@Constabulary

I have made thread guide

(For now is copper, but I will make from stainless)

 

@shoepatcher

I hope I can find new one. It would be niece if this caused problems. You are second person who notice these gap.

[Bosko90]

Hello. Some new information, but still no solution. I have a friend who owns an Adler machine that's almost identical. We swapped shuttle hooks. Mine fit into his machine with a bit more clearance. He slightly adjusted the spring into a more correct shape, and it worked well—it was stitching nicely. His shuttle hook fit into my machine a bit more tightly. It had very little clearance, which caused the lower thread to jam frequently. However, as far as I could test, my machine was able to sew 2mm thick material. When I put my shuttle hook back (the one with the adjusted spring, which worked fine on his Adler), it still doesn't work on my machine