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-   -   Drying wood in a microwave (https://www.routerforums.com/tools-woodworking/138635-drying-wood-microwave.html)

kp91 05-17-2019 09:37 PM

We're going to need a bigger microwave....

Herb Stoops 05-17-2019 10:15 PM

Quote:

Originally Posted by JOAT (Post 2019283)
I have never wanted, needed, or tried, to dry wood in a microwave. But when I first heard about that, I did a lot of reading on it. Forgot 99% of what I found out, but do recall that some of the wood was put in a paper bag with sawdust in it, then covered with sawdust, and dried in the microwave, don't recall any details. Seems to me that was used for green wood. What I do know is, if I wanted to dry wood with a microwave, I'd do a lot of reading of material posted by people who had actually done it. You'll also read about the mistakes many made learning how to do it.

However, it is most likely the wood is totally, ruined if it feels damp after 5 years, and utterly worthless to use. Your best bet is to forward it to me, for appropriate sacrifice to the Woodworking Gods - I am a High Priest, and will take care of all details. There is a time window on proper sacrifices, so send it quickly.
Kiddies, do not try this at home.

I have read that microwaving the green wood,think of turning wood, kills the kills the boring critters that will tend to keep on eating while the wood is air drying.
HErb

Stick486 05-18-2019 07:57 AM

Quote:

Originally Posted by Herb Stoops (Post 2019297)
I have read that microwaving the green wood,think of turning wood, kills the kills the boring critters that will tend to keep on eating while the wood is air drying.
HErb

They sound like popcorn on their way out...

CharleyL 05-19-2019 11:40 AM

Up until last year I've had a microwave in my shop, both for drying small pieces of wood, and for re-heating my coffee. @stick 's method is pretty close to the way that I do it.
My microwave's control panel quit working, so I got rid of it, but with plans to get another. It just hasn't happened yet. I really do miss my coffee re-heater.

Charley

MEBCWD 05-19-2019 11:49 PM

Quote:

Originally Posted by Cherryville Chuck (Post 2019285)
Iíve seen a wood technologist check samples for moisture content by microwaving for 20 seconds at a time I think and then weighing it. When it stops loosing weight itís dry.

I have used the microwave to dry turnings. Don't overheat the wood, it should be warm but not hot, use short periods in the microwave and pull it out and weigh it, record the results. Let it cool then heat it again, weigh it and record the results. when it comes out the same weight or close stop the process and let it acclimate to the surroundings.

You might get some movement in the wood when it loses moisture so if possible clamp it to a flat surface and let it cool each time. On bowls, I usually put the rim down and clamp across the bottom until cool, it helps maintain the shape. This does work but I don't know that it is any better than turning green and storing in a paper bag of shavings until dry, then finish turn the bowl.

mgmine 05-20-2019 07:20 AM

Quote:

Originally Posted by gmercer_48083 (Post 2019265)
Art, Chances are the wood is dry enough after 5 years. Acclimate for a week or two, then use it. Or make sure with a moisture meter. A moisture meter will give you a reading on that side of the lumber (not the entire thickness). Once the lumber is shaved to thickness...it will release tension if it has a lot of moisture. I say see what happens.

I think Gary is right. I looked at the wood I prepared and it seems as dry as a piece could get and now cuts just fine. It might have been that it was out in the rain for a few days and wasn't really green. I noticed yesterday that there were more 5/4 and 6/4 boards in the burn pile. I just don't have room for any more wood but I really hate to see it burned up


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