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Author Topic: Heat Correcting
Wolftrail
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So after tillering a wood bow whether its a laminate or self bow it takes about 1 1/2" of set. After heat correction and re-tiller what would the issues be..?
Posts: 727 | From: BC, Canada | Registered: Mar 2014  |  IP: Logged | Report this post to a Moderator
Pat B
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Too many answers. Be a little more specific if you can.
A bow takes set because it has been over strained and the belly cells(compression side) have been damaged. Also, on a lam bow it would depend on the glue used whether or not you can make heat adjustments safely.

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Wolftrail
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So you are saying after set heat correction does not work. ?
I have done minor heat correction using TB3 no problem.

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Pat B
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Sometimes heat treating will help remove set but in my experience it doesn't last. You are better off heat treating before the set occurs.
The Tite Bond glue will break down at 150 degrees. I got that info directly from TB tech support.

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Make the most of all that comes and the least of all that goes!
TGMM Family of the Bow

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Wolftrail
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quote:
Originally posted by Pat B:

The Tite Bond glue will break down at 150 degrees. I got that info directly from TB tech support.

I'am always careful when I do it and never failed me yet
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BMorv
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On my last bamboo backed bow I glued it using Unibond. I had some voids that appeared after glue-up (because the Unibond was bad) and I filled them with TBIII. I had to do some heat correction later in the tillering process, and the TBIII "cooked" and turned a burnt brown. The Unibond showed no change. I would say 150 degrees seems about right for TBIII. Unibond can handle more.

I agree with Pat on set. Set happens as a result of fractured wood fibers, and no amount of heat will repair those fractures. Although if you re-tiller it, you can remove some of the fractured fibers and strengthen the remaining good ones with heat.

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