## Cutting Boards with Inlays

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wb9tpg
Vectric Wizard
Posts: 423
Joined: Tue Sep 04, 2018 2:49 pm
Model of CNC Machine: Shapeoko 3 XL

### Re: Cutting Boards with Inlays

wb9tpg wrote:
Sat Feb 04, 2023 5:52 pm
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.

Gary Mitchell
Kentucky, USA

Aussie
Vectric Wizard
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Model of CNC Machine: Robotics Model 8

### Re: Cutting Boards with Inlays

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
Ron
Crafers Crafts

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Joined: Sat Jul 27, 2013 10:08 pm
Model of CNC Machine: AXYZ 4008

### Re: Cutting Boards with Inlays

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
bit 46473-K (mm)..crv

Aussie wrote:
Sat Feb 04, 2023 10:23 pm
I use Broinwood method.
For calculating the theoretical flat of a tapered rounded end bit?

wb9tpg
Vectric Wizard
Posts: 423
Joined: Tue Sep 04, 2018 2:49 pm
Model of CNC Machine: Shapeoko 3 XL