Author Topic: Heat-treating wood  (Read 5004 times)

0 Members and 1 Guest are viewing this topic.

Offline Marc St Louis

  • Administrator
  • Member
  • Posts: 3598
    • Marc's Bows and Arrows
Heat-treating wood
« on: January 11, 2011, 06:36:46 pm »
I'm surprised that with all the information out there and the TBB4 to boot there are still some people that have a hard time heat-treating.  I therefore decided to do a couple short videos on how I do it.  I didn't start out doing it this way but this is where it has evolved.  I did throw in a few words here and there but the noise of the gun did a good job of drowning me out.  Perhaps some people will profit from these.  Just to clarify, my heat guns output is 1500 watts with 2 settings.  The first setting is rated at 512 degrees and the high setting is supposed to have an output of 1112 degrees, I use the high setting exclusively.  Here's the vids

http://smg.photobucket.com/albums/v355/Marc-St-Louis/Videos/?action=view&current=100_2075.mp4

http://smg.photobucket.com/albums/v355/Marc-St-Louis/Videos/?action=view&current=100_2076.mp4

PS.  Just as a warning.  I coughed half way through the second one that scared the crap out of me when I played the video, I wasn't about to re-do it
Keep it flexible

Marc@Ironwoodbowyer.com

Offline NTD

  • Member
  • Posts: 1776
Re: Heat-treating wood
« Reply #1 on: January 11, 2011, 06:58:22 pm »
Thanks for taking the time to do that Marc, I'm sure it'll help quite a few people.
Nathen Danforth (Tucson, AZ)

Offline John K

  • Member
  • Posts: 1912
Re: Heat-treating wood
« Reply #2 on: January 11, 2011, 07:15:29 pm »
Sorry Marc, i couldn't understand a word  :(
The only way to fail is to never start !

Offline Marc St Louis

  • Administrator
  • Member
  • Posts: 3598
    • Marc's Bows and Arrows
Re: Heat-treating wood
« Reply #3 on: January 11, 2011, 07:30:04 pm »
I'm not surprised John, I couldn't either  :)

The video is more to show the length of time it takes to temper the wood.  Some people rush it by keeping the heat gun too close which does nothing more than brown the wood.
Keep it flexible

Marc@Ironwoodbowyer.com

Offline wvarcher

  • Member
  • Posts: 174
Re: Heat-treating wood
« Reply #4 on: January 11, 2011, 07:32:49 pm »
Great idea, Marc.  As good as one-on-one instruction.

Offline John K

  • Member
  • Posts: 1912
Re: Heat-treating wood
« Reply #5 on: January 11, 2011, 07:34:07 pm »
I turned the sound off and watched  :D I did like the Heat gun holder, going to copy that  ;D
The only way to fail is to never start !

Offline Elktracker

  • Member
  • Posts: 1920
  • Josh
Re: Heat-treating wood
« Reply #6 on: January 11, 2011, 10:10:44 pm »
Thanks for shareing I didnt hear what where you putting on before you moved the gun? Wax? oil? Thanks Josh
my friends think my shops a mess, my wife thinks I have too much bow wood, my neighbors think im redneck white trash and they may all be right on the money!!

Josh Vance  Netarts OR. (Tillamook)

Offline Holten101

  • Member
  • Posts: 115
Re: Heat-treating wood
« Reply #7 on: January 12, 2011, 01:53:02 am »
Thanks for the instructions Marc.

One thing is reading about heat treating in TBB, another is doing it your self....I for one heat treat all my bows (mostly Wych Elm and Yew), and Im one of the culprits who do it too fast and too close. It is not that I cant read, it more of a combination of a lack of patience and an intuitive reluctance to "burn wood".

I have long been baffled that your bows show such a high degree of kept reflex, and no doubt the slow heating is the trick. But, even when done "wrong" (ie. too fast and superficial) there are still benefits....bows still gain draw weight, and induced bend (ref/def), and as such serve as an introduction to heat treating.

In my mind heat treating is a tool with its own learning curve, that takes some getting used to. The hand held heat gun and superficial treatment is the first step that will give a feel for the method...which in time will lead to the deep heat treating (lacking a better word here) shown in your video and hopefull, in time, bows that resemble what you acchive in you work.

Thanks again for showing it first hand....your video shows perfectly what it takes to properly heat treat a bow:-)

Cheers


Offline Dean Marlow

  • Member
  • Posts: 313
Re: Heat-treating wood
« Reply #8 on: January 12, 2011, 06:10:23 am »
Thank you for the video. I didn't read any where telling how far away from the wood the heat gun is. You would have to have your wood nice and dry to heat that much. Dean

Offline fusizoli

  • Member
  • Posts: 232
Re: Heat-treating wood
« Reply #9 on: January 12, 2011, 07:14:22 am »
Thanks a lot Marc! Some people still haven't got the books (like me) ::), just read forums-build alongs for informations.This films give a very good first hand info, better than any pic!


Just some ideas to the better voice. If have equvalaser, fade the high levels and let just the low voices. It would be much better!


« Last Edit: January 13, 2011, 04:36:23 am by fusizoli »

Offline Pat B

  • Administrator
  • Member
  • Posts: 17697
Re: Heat-treating wood
« Reply #10 on: January 12, 2011, 08:09:21 am »
Marc, I'm stickying this up to the top for accessability.  Thanks for sharing your secrets. Pics are worth 1000 words! 
Make the most of all that comes and the least of all that goes!    Pat Brennan  Brevard, NC

Offline Marc St Louis

  • Administrator
  • Member
  • Posts: 3598
    • Marc's Bows and Arrows
Re: Heat-treating wood
« Reply #11 on: January 12, 2011, 08:09:48 am »
Thanks guys.  I had not viewed the video before uploading it so didn't realize the heat gun drowned out everything else.

What I apply to the wood just before I move the heat gun is Spruce resin.  The wood needs to be very dry before heat-treating otherwise you will get very large drying splits, this especially so when you are making a warbow with thick wood .  I keep my heat gun about 3 ~ 4 inches away depending on the temperature of my shop, 3" in the Winter and 4" in the Summer.    

Thanks Pat
Keep it flexible

Marc@Ironwoodbowyer.com

Offline ErictheViking

  • Member
  • Posts: 1165
Re: Heat-treating wood
« Reply #12 on: January 12, 2011, 01:20:30 pm »
thanks Marc, I now have ALOT more confidence to try heat treating, and now I understand more about the shims you mentioned in tbb4. 
"He that but looketh on a plate of ham and eggs to lust after it hath already committed breakfast with it in his heart"  C.S. Lewis

Online nativenoobowyer86

  • Member
  • Posts: 201
Re: Heat-treating wood
« Reply #13 on: January 12, 2011, 02:02:59 pm »
Great post Marc, much appreciated!
"If it feels like ur life is about to fall apart, back it with some rawhide an hope it holds together"

Offline hook

  • Member
  • Posts: 84
Re: Heat-treating wood
« Reply #14 on: January 13, 2011, 06:31:12 am »
what were u swabbing on the wood? thanks