Cutting Boards with Inlays

[wb9tpg]

I've spent a few hours to figure out how you calculated the 0.0281 but not managed to duplicate it or come close to it. So I guess I failing the test. Could you please explain it

Thanks, Gary

Here is what I come up with based on two different Amana bits. I'm a few thousands off your calculation.

[Aussie]

Hi Gary,
I use Broinwood method.
If you don’t mind spending a few dollars check out his video on the website, after a day of experimenting I am now getting the results that I wanted.
Regards
Ron

[adze_cnc]

Gary:

"When in doubt draw it out" might be the catchy way of describing how I did things. In Rhino 3D I drew a cricle. Then a vertical line. I rotated the line to the 6.2 degrees. I then moved the line using the tip as the starting point until it intersected with the circle at the tangent. I drew a horizontal line at the bottom of the circle. I extended the sloped line to the horizontal line. I mirrored the sloped line to the other side of the circle. I then measured between the end points of the two sloped lines where they cross the horizontal line.

Attached are two .crv files (one for each bit mentioned in your images) that contain the curves imported from Rhino. The theoretical flat for your .5mm bit is 0.4486mm.

Steven
 

bit 46280-K (inches)..crv

(40 KiB) Downloaded 24 times

bit 46473-K (mm)..crv

(40 KiB) Downloaded 21 times

 
 
 
 

I use Broinwood method.

For calculating the theoretical flat of a tapered rounded end bit?

[wb9tpg]

Attached are two .crv files (one for each bit mentioned in your images) that contain the curves imported from Rhino. The theoretical flat for your .5mm bit is 0.4486mm.

Steven

This was extremely helpful. Thank you very much for taking the time to prepare these files.

Gary