Calculate Compound Miter Joints

BigSky · Post by **BigSky** » Sun May 17, 2009 1:56 pm

dusty wrote:Can this be downloaded?

It certainly seems to work. It will almost necessitate that you have something like a wixey to aid in set up.

Years ago, I attempted an eight sided bird feeder. It was a disaster because I couldn't figure the angles. Now maybe I have a chance.

Thank you very much.

What is wrong with the chart in the book...Power Tool Woodworking For Everyone?

mickyd · Post by **mickyd** » Sun May 17, 2009 4:00 pm

markfive510 wrote:What is wrong with the chart in the book...Power Tool Woodworking For Everyone?

Don't know. Why? Did you find an error?

cowboyplus · Post by **cowboyplus** » Sun May 17, 2009 6:52 pm

markfive510 wrote:What is wrong with the chart in the book...Power Tool Woodworking For Everyone?

Give me a free book.

mickyd · Post by **mickyd** » Sun May 17, 2009 11:04 pm

markfive510 wrote:What is wrong with the chart in the book...Power Tool Woodworking For Everyone?

How about giving the whole forum a free book?

JPG · Post by **JPG** » Sun May 17, 2009 11:32 pm

mickyd wrote:How about giving the whole forum a free book?

Are ALL possible angle combinations in the chart that are possible with this 'program'?

cowboyplus · Post by **cowboyplus** » Mon May 18, 2009 1:09 pm

JPG40504 wrote:Are ALL possible angle combinations in the chart that are possible with this 'program'?

Probably not. This version is centered around a project requiring equal angles from 3 to 99 sides. It also calculates the length from tip to tip of each side in relation to the radius of the project.

The next version will incorporate a field for an individual angle calculation to the hundredth of a degree. That will surpass any published chart.

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dusty · Post by **dusty** » Mon May 18, 2009 2:16 pm

cowboyplus wrote:Probably not. This version is centered around a project requiring equal angles from 3 to 99 sides. It also calculates the length from tip to tip of each side in relation to the radius of the project.

The next version will incorporate a field for an individual angle calculation to the hundredth of a degree. That will surpass any published chart.

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Angles expressed to the hundredth of a degree? How am I going to measure that?

cowboyplus · Post by **cowboyplus** » Mon May 18, 2009 2:34 pm

dusty wrote:Angles expressed to the hundredth of a degree? How am I going to measure that?

Using your table tilt micro adjustment tool you made, measure the degree rotation of your adjusting nut to tilt 1/10º on your wixley and divide that by 10 and rotate that degree turn for each 1/100º you need.

The only chalenge left is having someone lese prove you got it wrong.

Perfection.

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dusty · Post by **dusty** » Mon May 18, 2009 3:13 pm

cowboyplus wrote:Using your table tilt micro adjustment tool you made, measure the degree rotation of your adjusting nut to tilt 1/10&#186].[/color]

This is doable!

I just came back from a trial test to determine what .001 degree adjustment would be.

Five full revolutions of the thumbscrew changes the tilt 1.4 degrees as indicated on the wixey. Therefore, .001 degree equals .00028 revolutions of the thumb screw.

Establishing a ratio to calculate the unknown:

1.4/5 = x/.001

therefore

5x= 1.4x times .001

therefore

x = (1.4x times .001)/5 equals .00028 revolutions per 1/100 degree.

I just gotta get a large, finely calibrated dial to measure rotation of the thumb screw. I might need new glasses, too.

Oops. That is 1/1000 of a degree.

Corrected answer is .0028 revolutions per 1/100 degree. That'll make that calibrated dial a lot easier to make and to read.

BTW - it is easy to find someone who will tell you "you got it wrong"!

cowboyplus · Post by **cowboyplus** » Mon May 18, 2009 3:21 pm

dusty wrote:...
BTW - it is easy to find someone who will tell you "you got it wrong"!

However, I said “prove.”

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