Needle unthreads on trim

First check to see if it goes in during the trim cycle. If it does, then make sure that the fork isn't bent and check your picker adjustment. The little fork is in front of the hook area/bobbin case. The picker (fork) should be level at the top and it should not be contacting anything when it goes all the way it.

Its there to let the thread wrap around it without making a stitch so the knife (under the needle plate) cuts, the tail length is controlled by the height of the fork (the lower the fork, the longer the tail).

I re read that and it sounds more confusing than it is. Basically, just make sure its not bent and its operating properly - if so, just lower the height adjustment without changing its angle (unless the angle is too far out and not allowing the thread to wrap around it.

Good luck

Thanks Nick! I've been wondering how to get a longer tail. I'll check that out!

hope things are well with you.

great to see you too - hope all is well, i sent you an email earlier - I hope I didn't get spammed.

Good luck - if its not the picker height then you can also try the control panel parameters for TRIM MODE (should be set on 3 but can be increased for longer tails).

Let me know if I can help

Hey there, Caught your message.

I feel your pain, and trying to get support out of SWF is like smashing your head against a wall. If you bought a used one, then you might not have SWF support available to you.

What you are experiencing is referred to as a thread "pull out" I used to own a bunch of SWF's. I have found over my years that this is a VERY common problem with them. Typically speaking SWF i've found likes to run tight, the optimal tensions are usually tighter than most machines. But if your H tests look good, then it shouldn't be a huge issue.

Which 15 needle do you have? Is it the one with the color LCD display or the one with the LED?

Some things to check:
Check the picker. Its that little fork looking thing in front of the bobbin? Is it bent? It should be straight and even. If it is not. Adjust it so it is with the screws on the side and make sure it just barely clears the guide screws on the side.

Increase your tail length, if you have the LCD it is under picker off timing, the LED it should be under Paramters (I believe, don't really remember that one)

Make sure its CLEAN, take off the needle plate and make sure there is no excess bobbin fibers, thread pieces etc, if so, you could be interfereing with the cutter.

There could be numerous other things.
Go to swfdtg.com and click on general FAQ's. I believe they have a PDF you can download / print with all the steps that could be causing this.

Hope this helps.
Any other questions just let me know.
-- Eric :-)