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 Post subject: burning wood
PostPosted: Thu Oct 17, 2019 11:17 pm 
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Joined: Wed Oct 09, 2019 10:09 pm
Posts: 8
anybody experience burning of wood during the bending process my wood(walnut) has plenty of moisture my craft paper was soaked my temp controller was set to 300 degrees i noticed the wood started burning at only 210 degrees on the thermometer i went ahead with the bend the temp spiked over the set temp so i shut off the the blanket and let it completely cool down and noticed the wood was burned i have never experienced this before????????????
any suggestions ?????


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 Post subject: Re: burning wood
PostPosted: Thu Oct 17, 2019 11:29 pm 
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Joined: Sun Mar 09, 2014 8:13 pm
Posts: 2034
I don't know which kind of temp control that you have, so I'm going to ask a lame brained question. You're sure that you're temp control was set for farenheit, and not accidentally switched to centigrade (if you have this option)?


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 Post subject: Re: burning wood
PostPosted: Fri Oct 18, 2019 9:06 am 
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Joined: Fri Mar 03, 2006 7:09 pm
Posts: 5972
Location: Hegins, Pa
yup you had it on Centigrade
wood won't scorch until you get into the high 300s in F

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John Hall
Blues Creek Guitars Inc
Authorized CF Martin Repair Center
president of Association of Stringed Instrument Artisans
http://www.bluescreekguitars.com


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 Post subject: Re: burning wood
PostPosted: Fri Oct 18, 2019 10:04 am 
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Joined: Wed Oct 09, 2019 10:09 pm
Posts: 8
I have the lmi temp controller it has worked fine until now I originally set it up to read F. So I don't know how it could've got switched to C.
I'll check it though
Thanks , john


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 Post subject: Re: burning wood
PostPosted: Fri Oct 18, 2019 12:30 pm 
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Joined: Mon Jul 09, 2012 9:49 pm
Posts: 261
I've scorched guitar sides I was bending in a Fox-style bender when I didn't have the temperature probe on the same side of the wood as the heat blanket (or on the outside of the heat blanket). Comtroller was set to 300 degrees (f), too.

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peter havriluk


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 Post subject: Re: burning wood
PostPosted: Fri Oct 18, 2019 9:51 pm 
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Joined: Wed Oct 09, 2019 10:09 pm
Posts: 8
The 120 volt lmi temp controller only reads in F. I think the temp lead for temp controller is bad and reading the wrong temp. I'm replacing the lead we will see how it compares


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 Post subject: Re: burning wood
PostPosted: Sat Oct 19, 2019 1:22 pm 
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Joined: Sun Mar 09, 2014 8:13 pm
Posts: 2034
I agree with Peter. Either your probe is bad, or it may not have been in contact with the wood and your controller continued to heat up.


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 Post subject: Re: burning wood
PostPosted: Sat Oct 19, 2019 7:04 pm 
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Joined: Wed Oct 09, 2019 10:09 pm
Posts: 8
No the temp probe was in between the wood and the blanket its possible I had the probe plugged in the controller backwards and it was not reading the correct temp.


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 Post subject: Re: burning wood
PostPosted: Sat Oct 19, 2019 9:40 pm 
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Joined: Mon Mar 19, 2012 4:19 pm
Posts: 53
Location: Forest Ranch, CA
I've had the probe between the wood and the blanket and ended up with two charred areas on either side of the probe. I assumed that the small spaces where air could be increased the temp causing that. I put the probe outside the blanket now...no problems.


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 Post subject: Re: burning wood
PostPosted: Sun Oct 20, 2019 11:27 pm 
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Joined: Wed Oct 09, 2019 10:09 pm
Posts: 8
thanks, for all the info.


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