CB3200 needle thread fraying

[koreric75]

1 hour ago, Ferg said:

This is a stretch but...... In Fig 12-3, note the feed dog attaching screw (4). Check that with your finger if you have the shuttle removed. Is there a burr on it? The thread passes over that screw head when the stitch is pulled up.

It is a flat head screw and is normally tightened very tight. If you wish to loosen it and retighten, make sure you have a screw driver that correctly fits the slot in the screw. You can ruin the screw if wrong driver used.

I hope you held onto the shuttle mechanism when you removed the screws in the outer ring. They are spring loaded and will push the shuttle out of your hand some times.

Ferg

that screw was like a saw blade, burrs on both ends of the slot and proud of the recessed mounting location, also, the feed dog itself had a burr that i didn't notice until taking it out.  the back of the hook was smooth and nothing in the race path that i could find...here's a pic of the feed dog inner loop, the thread probably does run along here, but after smoothing this off and putting it all back, the fray is still there, i'll have to compare to see if it's less or not, but still noticeable.

 

does this look like the needle may have hit/glanced off of it?  I checked rotation before taking it out multiple times to make sure i had the needle in correctly and it never touched...same after putting it back together.

Edited June 4, 2018 by koreric75
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[koreric75]

So I'll have to hang on another day until alexander gets back to the shop, in the mean time I'll let this percolate in the back of the brain and focus on getting a few patterns drawn up and laminated...I really can't express how appreciative I am of everyone's advice and willingness to offer up ideas and personal experiences...Y'all have a great Monday!

[Ferg]

That screw isn't the one I was referencing. 

 

When you remove the bobbin you can see the screw that is designated by the number "4" above. If you have the narrow slotted needle plate installed on your machine you will not have this screw or the feed dog shown as number "6".

To make any adjustments to this feed dog or the screw it is best to remove the Shuttle Race designated by number "2" in figure 12-2.

When you turn the fly wheel as I stated previously, watch the thread just after the hook gets hold of it from the needle. It jumps through a couple places that you can observe. One of those is possibly where your problem is.

I don't remember which needle plate you are using.

I just watched your video a couple times. It looks as though the thread may be getting frayed as it goes through the little "eye" just above the needle. Could be a burr in that hole.

Ferg

Edited June 4, 2018 by Ferg

[koreric75]

Yessir, i removed the feed dog (#6) & screw (#4), that is what i smoothed out last night, there was a nick in the feed dog inner loop, this helped some but it's still fraying a little, i compared the two videos, before and after smoothing the burred screw head and feed dog nick...it's still fraying some, but not as bad.  I wanted to talk to solar leather before doing any more to it, don't want to void any warranty or anything.  

If it is the little eye above the needle mount, i'm definitely not ready to try deburring that...lol, maybe some jeweler rouge on a piece of thread?...lol  I am going to take a look at it and try just pulling the thread through that hole without the needle eye threaded to see if that does it.

[Ferg]

The cloned machines are for the most part very good machines. I think their main problem is not taking the necessary time to fine tune and FINISH some of the pertinent parts.

I have said for years that some things they make must have been cast in a basket of dried leaves. LOL

Ferg