Tartan,

This is exactly the procedure I use...thank you.

Greywuuf, my husband thinks that perhaps the "nut" on the back needs a lock washer on it...this one doesn't have one. I'm wondering if yours has one. Maybe that's what it needs in order to keep it locked in adjustment.

Surfergirl,

Not sure about your Singer, but I have 5 (?) machines that use the long bobbins, and quite a few that use the round bobbins with the same type of winder. None of them have lock washers on the back. I think greywuuf is right that there is a shoulder on the axle screw.
None of mine have ever come loose and I've never needed to take any apart that far for cleaning, so I'm not sure. Since yours is loose, it wouldn't be that hard to take it apart for a deep cleaning and make sure.

Joe

I would tell you if I knew. I am away from home and don't have one to look at right now, plus mine were stubborn and I could not even get that screw loose. So I have never had that particular screw/nut apart. I will say that I have 5 machines that use that type of wonder and none of them "self tighten" so later today I should be able to get you the answer you need.

Surfer:
I just took my bobbin winder apart and took a bunch pictures and will post them if you need, but I think I discovered a couple of things to check.

First off did you take yours completely apart?
If you did you found two cupped washers. They are not the same. One is thicker than the other. The THIN one goes behind the toothed wheel with the heart shaped cam.
Also the screw that holds the cam on is "etcentric" and is used to adjust the tooth engagement to the screw drive (on the tire).

So make sure to use the thin washer, adjust the cam to just engage and then tighten the nut on the back. That should take care of it.

Let me know how it turns out.

Dan.

Reading back through my post I see I forgot to mention, yes the screw that is the "axle" for the cam has a shoulder, and no there is no lock washerer (nor is one needed) if you have the wrong washer in there it is to thick and the cam gets pinched (locks up) before the shoulder comes to bear, and you can't get the nut tight enough to hold. I accidently put mine together that way tonight and it did exactly as yours does, had to take it back apart and realy look at it before I figured it out. It is easy enough to tell which washer is thick just by comparing them, don't worry you won't need a micrometer or anything to tell ;).
Again, good luck and let us know if it works or what you find.

Dan

Dan:

We'll take it apart today. Will let you know if it works. Thank you.

Dan,

We took everything apart and the washer that is supposed to be between the heart shaped cam and the wheel with teeth is missing. The cup-shaped washer that is present was placed against the back side of the wheel with teeth. If you can send pics of these washers, it would really be appreaciated. My email address is: [email protected]

Lynn:

I did not take the heart shaped cam off, the washer is supposed to go behind the tooth wheel. there is another between the pulley gaurd and this moveable tire unit. I have uploaded photo's of mine in my album: http://www.quiltingboard.com/members...bums17262.html. I hope this helps.

Dan,

Thank you so much for taking the time to help me. I will let you know if we get this working. We will have to locate another washer somewhere.