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StoneBuiltKnives

Cobra class 4 reverse issues

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4 hours ago, Doc Reaper said:

So I watched the operation of the needle closely, and the thread was not even, like it was cut by scissors, but even enough to be happening at one spot - the eye of the needle (where the thread goes thru). 
Not all at once but the thread was bunching on the feed side of the needle and the fibers of the thread kept popping one at a time! So I got a needle with a larger hole and my problem vanished!

The throw and tension of the check spring also affects the quality of the loop. A longer throw and tighter action can overcome the tendency of poorly bonded thread to unravel. Furthermore, if the unraveling is due to excessive twistiness in the spool, wrapping in the opposite direction around the top post may offest the twist problem and keep the loop at the needle intact.

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