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Rattiac or anyone else.
Machine: Rex #26-188 commercial unit

Was patching up some blue jeans this morning, all well then.....funny scrunching/binding sound. I thought loose thread got bound up bobbin side. I slide material out and there was a rats nest on the bottom side. I pulled bobbin trimmed reinstalled, tried again.....same.

I pulled bobbin back out, got stronger glasses on and found a piece of thread looped around bobbin spindle. Cleared, cleaned, oiled, changed bobbin spool even. Retried, same!😡  Thought maybe needle was getting dull or perhaps chipped/broke. Replaced needle, tested again....Aarrgggg! Same 😡🤬🤬🤬🤬

What the hell am I missing??
Pics of the bottom, bobbin side of any material tried.

Update**** I took the bobbin/carrier back out, went to parts house and got some brake clean. Unplugged machine sprayed down exterior pivot points, then tipped machine on its side to get to all under moving parts.
Spayed all down good, air blowed dry and reoiled everything. Plugged in and ran it wide open throttle for several mins, reoiled, ran again then wipped down everything. Put bobbin/carrier back in, rethreaded machine. Grabbed new shop towel, folded and one little crackle sound, then off to the races it went. It's sewing fine now, but I don't know what caused this?

Maybe something got a bit out of adjustment that i didn't notice or a piece of built up dust/oil somewhere? The machine does get body shop type dust on it from time to time. I always air blow and oil before i use it. Would really like to know what was causing this.

Needed a new coaster for my table anyway.😁

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The General Discussion - Intros section is for "Off Topic" posts...they don't have to be "Bowtie Related"

i.e jokes, family pictures, humor etc

As is states:

Feel free to talk about anything including suggestions, introductions etc for this forum. (Intros - optional)

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Had software guru Krash sign in and fix the automatic picture attachment feature.  Now when you post a picture it will be automatically resized and include a thumbnail image to click on. (see test area)

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Test attachment resize

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After the chop I have a couple of seams like this one.  My question is would lead be sufficient to close up and stabilize joints like this or is more welding required?   I can put more weld via TIG or MIG.