Need to cut round top ridge all the way around the face of a

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kp77
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Need to cut round top ridge all the way around the face of a

Post by kp77 »

I need to make a round top ridge around an octagon on the face of the wood. See Attached. Basically like a round over but on the face and 3/8" high and 1 1/4 wide.
This ridge needs to travel around the face of an octagon picture frame. Can anyone tell me how to do this? I can't find a router bit even close to what I need. I have vcarve 8 but not much else.
Please Help and Thanks for reading this post.
Attachments
I need this pointed top rounded over like in pic2 demonstrates with red oval.
I need this pointed top rounded over like in pic2 demonstrates with red oval.
Pic2.jpg

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Mike-S
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Re: Need to cut round top ridge all the way around the face

Post by Mike-S »

If this is what you want, it's just a two-rail sweep.
Attachments
OctoFrame2.jpg

kp77
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Re: Need to cut round top ridge all the way around the face

Post by kp77 »

That is pretty close. This picture may show it better. I need what you have there but the ridge can't be right on the edge.
Is it possible to move it inward more. Not to mention I don't know how to do a 2 rail sweep.
Attachments
Pic3.jpg

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dhellew2
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Re: Need to cut round top ridge all the way around the face

Post by dhellew2 »

It would still be a two rail sweep. Dale
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Mike-S
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Re: Need to cut round top ridge all the way around the face

Post by Mike-S »

You need to go thru the tutorials. Otherwise you will be very frustrated. 2-rail sweep is a basic tool you'll use often.
Below model took under 5 min.
Attachments
OctoFrame3.jpg

kp77
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Re: Need to cut round top ridge all the way around the face

Post by kp77 »

Thank you for your help. I am doing just that.

glenninvb
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Re: Need to cut round top ridge all the way around the face

Post by glenninvb »

I don't believe the OP has Aspire...... only VCP8

kp77
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Re: Need to cut round top ridge all the way around the face

Post by kp77 »

That is correct. I do not have aspire.

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FixitMike
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Re: Need to cut round top ridge all the way around the face

Post by FixitMike »

You can do this with Paul Rowntree's fluteplus gadget. It will cut the ridge with multiple radial cuts.
http://paulrowntree.weebly.com/gadgets.html

Settings I used for the gadget:
Tool: .25 dia End Mill
Flute Mode:Use As-Is or Truncate Profile to match Rail length
Start Depth: 0
Flute Depth .15 (equals radius that I used for the bump)
Profile steps: 100

Note: using radial lines for the rails means that the cross section is not a perfect radius. You can draw lines perpendicular to the sides and run the gadget using them if you are a perfectionist.

The .crv file was too big to post with the toolpaths. So you will have to download the gadget (All 3 files, and read the instructions to see where they go.) and run it to see the toolpaths.
8 side trim.crv
(108.5 KiB) Downloaded 178 times
8 side trim.JPG
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FixitMike
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Re: Need to cut round top ridge all the way around the face

Post by FixitMike »

Here's a crv file with a toolpath for one quarter of the path.
8 side trim2.crv
(704.5 KiB) Downloaded 209 times
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kp77
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Re: Need to cut round top ridge all the way around the face

Post by kp77 »

THat is exactly what I need. Thank you all for your help.

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FixitMike
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Re: Need to cut round top ridge all the way around the face

Post by FixitMike »

Note that the start points on the rail and profiles will set the orientation of the contour.
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FixitMike
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Re: Need to cut round top ridge all the way around the face

Post by FixitMike »

One more note:
There needs to be enough room on the profile for the bit to reach all of it. That is, the flat parts of the profile have to be at least as wide as the diameter of the tool, and if you want the edge of the "bump" to be nearer the edge of the material than the bit diameter, the rails need to extend beyond the material. Also, best if the start points of the rails are at the outside edge (which is not true of my example).
Good judgement comes from experience.
Experience comes from bad judgement.

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