Cool USe for AngleCalc

[DaveVanEss]

I found a really cool application for the Scrollmania angle calculator. I had a project were I needed to drill some 6 degree holes. I went to the angle calculator and entered a thickness of 1 and a width 0 and solved for the angle. If the angle was less than 6 degrees I increased the thickness by 1 and solved for the angle. If the angle was less than 6 degrees I increased the thickness by 1 and solved for the angle. I kept doing this until the angle got close enough to 6 degrees.

T W A
1 0 0.0 (increase width)
1 1 45.0 (increase length)
2 1 26.6 (increase length)
3 1 18.4 (increase length)
4 1 14.0 (increase length)
5 1 11.3 (increase length)
6 1 9.5 (increase length)
7 1 8.1 (increase length)
8 1 7.1 (increase length)
9 1 6.3 (increase length)
10 1 5.70 (increase width)
10 2 11.3 (increase length)
11 2 10.3 (increase length)
12 2 9.5 (increase length)
13 2 8.7 (increase length)
14 2 8.1 (increase length)
15 2 7.6 (increase length)
16 2 7.1 (increase length)
17 2 6.7 (increase length)
18 2 6.3 (increase length)
19 2 6.0 (DONE!)

So I took a piece of scrap wood and cut a triangle that was 8.5 inches (19/2) long and 1 inch (2/1) high and cut it out on the scroll saw. I now have a 6 degree reference guide.

This will work for whatever angle you wish.

[Sawdust King]

Dave,

Thanks for the tip. I'm wondering why so many efforts.

Plug 84 into Angle, 1 into Thickness and then click solve for Width.

With angles less than 45 use 90-target angle.

[handibunny]

OK, I don't get it. What is the purpose of doing this? Obviously it's not for the purported purpose of Angle Calc, which is to compute the angle that the table deflects from its level position, aka the cutting angle.

And if you have to cut the wood anyway, why not just cut it at the angle you need, then tweak it on a sander whose table is set to the same angle?

I guess I'm missing something. I just don't know what that something is.

[Hawaiilad]

Yep, I'm lost as well Carole...but then I have been bumping into walls of late

[Sawdust King]

I think the goal was to create a wedge to use to adjust the angle of drilling surface on a drill press without having to adjust the table. Not being a bowl cutter, I wasn't sure what AngleCalc was supposed to do.

Correct me if I'm off and need to buy Carole Rotham's book. The original purposes of AngleCalc is to determine the angle you need to set your saw so that each ring of thickness (height) with a width (wall thickness) will line up with minimal sanding.

[handibunny]

Sawdust King, you've got it right. It's really a simple tangent function, to compute the angle that will give you a straight sided bowl, which is a function of ring width and wood thickness. Dave's program automates it, although I find it prudent to add an extra angle to account for kerf width and cutting irregularities. Using a tangent chart (in the Appendix of the bowl book, disguised for the math phobic) is also easy, but low tech.

However, the fun doesn't start until you vary the angles to get the curves--that really makes folks sit up and notice.

[DaveVanEss]

I wanted to drill 6 degree holes on my drill press. I made a 6 degree wedge and placed my material on it! That way I don't have to bevel the table on my drill press.

Dave

[Sawdust King]

I wanted to drill 6 degree holes on my drill press. I made a 6 degree wedge and placed my material on it! That way I don't have to bevel the table on my drill press.

Dave

Yea, my assumption of his intent was correct. I've done one thing right, too bad it wasn't on a scrolling project.

[DaveVanEss]

A broken watch is right twice a day!

Dave