Changed To Thicker Thread, Hell Broke Lose!

[Christoffer]

I tried 2 of each from 120-160.

I also rewind the bobin a couple of times.

Of this size I only tried this thred yes, it worked fine with the much finer cotton thread.

[gottaknow]

You should check your latch opener adjustment. It would explain why it worked better with thinner thread.

Regards, Eric

[msdeluca]

Is there a hole near the bottom of the needle bar just above the needle that you didn.t thread? I missed that once and got breaking thread and nests. It was like the machine had lost its mind for no reason.

[Christoffer]

Ok, never done that before. Is it the same as hook timing? Cant find info about it

[gottaknow]

The latch opener is a little piece that pulls the bobbin basket a bit counter-clockwise to allow the needle thread to pass between the small tab one the basket and the notch on the bottom of the throat plate. It can be checked with material in the machine, with the hook plate open so you can see the needle thread move over the top of the hook. If you search this forum, I go into the adjustment in great detail. I'm attaching a photo so you can identify the part and it's function.

Regards, Eric

[Christoffer]

At the further right position the latche is closed, but the thread are no way close to pass at that point anyway.

Apparently my hook grabs thread after thread, turning the machine by hand.

The safety mechanism deployed earlier as you know. Could the timing belt be wrong? The walking foot and feed dog move perfectly in sync, but maybe they allways move together even if the bobin doesnt spin? The timing marks are correct accoring to manual

[Christoffer]

Oh, the drive belt was wrong, doh... It have multiple timing marks and the availabe manual say different.

But this still happens:

[gottaknow]

I can tell by looking that your latch opener isn't set correctly. Loosen the screw and move that flat curved piece to the right. When the thread approaches the tab on the basket, your latch opener should be contacting the basket to make room for the thread to pass and set the stitch.

Regards, Eric

[Christoffer]

The drive belt was set for the wrong timing mark, it now works. But as showed in the last two pics, this still happen with the thread close to the tensioner

[Cobra Steve]

Eric's right. Also check the finger on the basket that fits in the cutout under the needle plate. Sometimes you have to take a shade off the cutout to allow heavier thread to pass through. Keep in mind that you should only use 138 top and bottom for maximum efficiency. Thanks, Steve