Bow oven malfunction, need advice

[Living_waters]

Ok I pulled a good one, I was trying to up my temp just a little by adding a hotter light. Only light I had was a small flood I thought I would try it, done real good temp came up about 10 degrees. left for a couple hours came back and pulled bow out and right under light was a scorched spot on the limb. It melted the inner tube wrap scorched the tape and made a dark spot on the limb.
Glue was urac, backing was live oak with a live oak core and ERC belly. Was trying a design experiment but the scorched spot has me worried. How will it effect the limb?

[StoneAK]

I don't know if it will hurt the integrity of the wood or not. I do know that a flood light or a heat light will scorch wood if to close. Don't ask how I know it will scorch wood personal experience.lol  

[SEMO_HUNTER]

Hmmmmm.......man sorry to hear that. Can you sand that spot down, or does the design not permit that? Not sure what your working with there, maybe a pic would help?

I hope you can still make it work, I've had a few of those moments myself.  

[Living_waters]

I will post a pic later after I clean off the tape residue. Another hard learned nugget, frog tape is wonderful until you get it too hot. I will wipe the limb down and get the adhesive off after the bow has a few more hours to rehydrate. I was afraid to wipe it with acetone before it got a little moister back in it.

If it fails it is no real biggy, other than using up some of my live oak that I have been saving for the right project. A while back I came up with 2 one inch boards 9 ft long. One has absolutely perfect heartwood grain. So for this bow I had a quarter sawn core and a plain sawn backing that was one growth ring almost completely the full length. Thats what will upset me if I skrewed it up.

StoneAK  there is comfort in knowing that you are not alone I guess........wonder if mental patients feels that brother hood? LOL

[PEARL DRUMS]

Back or belly got scorched?

[eflanders]

You have just tempered the bow in one specific spot.  I would temper the rest of it and then move on.

[tradbower]

With urac 185 you dont need a oven, clamp it up and let it set at room temp over night and your ready to go.

[Living_waters]

It may have nothing to do with it but I havent had a delamination using urac since I started baking urac. May be a reason not to bake though.

OK here are the pics. First what I found when I opened the big pink monster (my 10 buck bow oven)
   

Here it is with the adhesive wiped off.
   

And then here is a look from the side, core is a little discolored.
   

I think i will start a separate thread to see how this thing turns out.

SOOOOOOOO what you think?

[PEARL DRUMS]

Belly or back is toatsed?

[Living_waters]

Sorry, it is the back. part of the dark in the picture is the glue line, I hadn't did any major sanding on it yet.

[PEARL DRUMS]

I dont think you did any major damage to it. I would have rather you said it was the belly, then you could have lightly toasted the rest of it and added some compression strength to it. Im not sure what a back will do when you toast it since it acts in tension?

[Living_waters]

Yeah that was my worries, but I gues we will find out. It made a slight dip in the ark of the limb just as if it was being heat straightened. You cant really see it until you bend the limb. It doesn't seem to be stiffening or weakening the limb just changing the first part of the tiller slightly much the way a character bow does that has a deflexed hump midlimb.
One thing that may save it is the glued in reflex (I am careful to not say perry reflex LOL) by theory adding early un natural compression to the backing you lessen the tension at full draw.

We will see this afternoon, I will get a string on it and see how it is going to bend on the tree.