I'm sure that was a typo when you said 45 degrees on the table saw. That would make a square box :-). If your stave is 3.375" wide after cutting there should have been no problem. I don't mean to be insulting but if you started with a piece of wood that was 3-3/8" wide and then cut the angles, the piece might have ended up closer to 3-1/8" wide if you factor in the saw blade kerf. Even then the piece would have been around 7-1/4" once turned. All I can say is check the width of your staves again and report back.
-Tim
----- Original Message -----
From: James Edgell
To: legacy-ornamental-mills@googlegroups.com
Sent: Monday, April 23, 2012 8:16 PM
Subject: Re: could someone explain the formula
see i am doing 45 degree cuts on a table saw, like the router bit they have
at magnate, i just think it is easier and allows for more speed, so i was using
their formula , and came up with 3 and 3/8
On Mon, Apr 23, 2012 at 9:55 PM, Tim Krause <artmarb...@comcast.net> wrote:
I just looked at the specifics of what you are trying and your numbers
should have worked as shown by this drawing.
At 3.375" you would have had extra room to make a 8" column (assuming 8
sided polygon).
I'm not a math guy and the formula to find the length was complicated to me
which is why I made my spreadsheet program. To find the length of the segment
you take the desired outside diameter and multiply it by the tangent of the
miter angle which is calculated by dividing 360 by 2 times the number of sides.
So, 8" * tan(22.5) simplifies to 8 * .414 and that equals 3.313" which is
pretty close to my cad model. I'm not sure where you went wrong.
There is a birdsmouth calculation in magnate's catalog that even works for
polygons. For 8 sided polygons divide the diameter by 2.414. That equals
3.314 which is close to my model as well. That number to divide things by is
going to change depending on the number of sides. I've got that information
buried somewhere so I'll leave that up to other that might know.
It sure would be good to know what went wrong.
-Tim
----- Original Message -----
From: James Edgell
To: Legacy-Ornamental-Mills@googlegroups.com
Sent: Monday, April 23, 2012 1:21 PM
Subject: could someone explain the formula
on 8 and 12 sided hollow columns, this is the first time i am gonna
attempt doing one of these for an idea i have and my numbers dident come out
right, lol, when figuring for the diameter of the column. i wanted an 8 inch
round and cut an 8 sided boards at 3 and 3/8 inches but came up way short when
using 2 inch thick wood. appreciate any help you might be able to
offer,,,,thanks,,,,,JD
--
You received this message because you are subscribed to the Google Groups
"Legacy Ornamental Mills" group.
To post to this group, send email to
legacy-ornamental-mills@googlegroups.com.
To unsubscribe from this group, send email to
legacy-ornamental-mills+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/legacy-ornamental-mills?hl=en.
--
You received this message because you are subscribed to the Google Groups
"Legacy Ornamental Mills" group.
To post to this group, send email to
legacy-ornamental-mills@googlegroups.com.
To unsubscribe from this group, send email to
legacy-ornamental-mills+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/legacy-ornamental-mills?hl=en.
--
You received this message because you are subscribed to the Google Groups
"Legacy Ornamental Mills" group.
To post to this group, send email to legacy-ornamental-mills@googlegroups.com.
To unsubscribe from this group, send email to
legacy-ornamental-mills+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/legacy-ornamental-mills?hl=en.
--
You received this message because you are subscribed to the Google Groups
"Legacy Ornamental Mills" group.
To post to this group, send email to legacy-ornamental-mills@googlegroups.com.
To unsubscribe from this group, send email to
legacy-ornamental-mills+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/legacy-ornamental-mills?hl=en.
<<8inch_column.jpg>>
