Author Topic: The Laser Project.  (Read 782174 times)

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Offline Chaoticone

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Re: The Laser Project.
« Reply #680 on: October 06, 2012, 08:00:40 AM »
Tweakie, have you done any test or comparisons with the different woods and their surface finish, density and moisture content?  I'm just thinking if those 3 variables were monitored maybe a formula could be created to give consistant results. 

You do some of the neatest stuff Tweakie!

Brett
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Offline Tweakie.CNC

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Re: The Laser Project.
« Reply #681 on: October 06, 2012, 08:10:41 AM »
Hi Brett,

I had not even thought about measuring moisture content (I do have the equipment to measure that) but surface finish certainly does play a big part in determining the result.

Any thoughts or suggestions on the easiest way I can determine density ??

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

Offline Chaoticone

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Re: The Laser Project.
« Reply #682 on: October 06, 2012, 09:07:48 AM »
I have used this before.

http://www.engineeringtoolbox.com/wood-density-d_40.html

I don't know how accurate that will be really because of growing variables but it should get you with in a reasonable range.  You could also just measure and weigh and account for moisture content or its probably overkill but you could do a displacement vs weight test.  Maybe vaccum seal the wood in a known size bag and sink it in a pan of water and measure the amount of water that gets displaced.  I wouldn't think you would need that at all unless you were trying to measure odd shaped pieces.

Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!

Offline Tweakie.CNC

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Re: The Laser Project.
« Reply #683 on: October 09, 2012, 07:00:10 AM »
Thanks for the info Brett, it is most helpful.

Overall the Obechi seems to give me the best results with, contrast ratio, so far but I still have a few more different woods here to try.

Tweakie.



Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

Offline Dan13

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Re: The Laser Project.
« Reply #684 on: October 09, 2012, 07:17:45 AM »
Hi Tweakie,

Why are there vertical lines on the last one?

Dan

Offline Tweakie.CNC

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Re: The Laser Project.
« Reply #685 on: October 09, 2012, 07:32:58 AM »
It's the grain of the wood Dan.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

Offline Dan13

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Re: The Laser Project.
« Reply #686 on: October 09, 2012, 07:40:59 AM »
Ah... They are so evenly spaced and bright (I would have expected the grain be darker than rest) that it didn't occur to me it was the grain ;)

Dan

Offline Chaoticone

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Re: The Laser Project.
« Reply #687 on: October 09, 2012, 08:02:10 AM »
Tweakie, what are the physical dimensions of the piece in the last picture you posted?

Brett
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My guard dog is not what you need to worry about!

Offline Tweakie.CNC

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Re: The Laser Project.
« Reply #688 on: October 09, 2012, 08:24:38 AM »
Hi Brett,

It's 150mm x 95mm.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

Offline patter

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Re: The Laser Project.
« Reply #689 on: October 13, 2012, 03:50:57 AM »
WOW  Tweakie.... the contrast is perfect....excellent