how would you duplicate this peice of moulding?

[knight_toolworks]

This a interesting piece. My client knows he will have to do some carving on this to get it right. like on the left side you can't get a v bit into there as the angle is too steep. His main concern is to get the sharp cuts. I was thinking of just doing a 3d profile to make the molding and then use a small v bit to cut the grooves and have the rest done by the client. I could do it mroe in a 3d cut with all the humps and just to the grooves afterwards.





http://i154.photobucket.com/albums/s266/knighttoolworks/posting/0B246087-CB8C-4732-8B20-78B6963BB66F-793-000001348C2A189C_zps766eacda.jpg


http://i154.photobucket.com/albums/s266/knighttoolworks/posting/4CC79972-4FE7-42A1-BF35-73BF024A0ED1-793-000001348F724DC6_zps76aff2d4.jpg

[kubotaman]

Steve, I may be way off base but do you have Aspire?? If so looks like you can make it a two rail sweep and then create the first pattern. From there I think you could then duplicate them as necessary as far as overlap. obviously you will need a small bit for the pattern but I would think you could find it.

[myxpykalix]

I would think it would be relatively easy. The carving looks like staggered "V"s that overlap each other. You could draw that particular V shape, cut and paste a few copies over each other. Then use this bit to cut it:
http://www.magnate.net/index.cfm?event=showProductGroup&theID=57
a point cutting roundover bit

I would first trace the profile of the moulding in your picture. Extrude that along your length
create a toolpath to 3d carve that
Then take your V pattern and carve that into your shape:D

[bryan]

Depending on how close your client wants it?

the same scan it and get to cutting some 3D files with a small 1/16 ball nose to keep the sharp corners.

if it just close, then I'd mill the base wood with some shapper/router bits to get it as close as possible then, dream up a 3 D Tool path that follows base routing, and only route the groove. This would shorten the 3d file cutting time depending on how many running feet you need to make.

[knight_toolworks]

it has to be as exact as possible it is a restoration job.
I thought of the roundover bit bit they are too large and not the right angle. I will have to use a 1/4" v bit to keep from hitting the sides. If I can draw it I can get the curves done in 3d. but the sharp details will need a vbit but the bit can't get everywhere and the it will need some hand work. but the client planned on doing some carving.

[bleeth]

How many feet do you need to make?
Looks like a tapered ballnose could cut it. Wrapping the relief over the extruded molding profile is the way to design it.

[rb99]

Could you carve the center with the V carve pattern and add the top and bottom pieces after?

How many feet do you need?

[larry_k]

I made about 400 pcs like this 6 years ago. I did all In artcam. No hand carving. 2rail sweap. then bump up the vector. the pic I show are what the customer gave me to copy, larry

[larry_k]

I cut all In 3d or rastered

[bcondon]

Honestly, I would so it on a shaper with custom cut blades.

I would expect this to take a lot of machine time with the shopbot
which is pretty expensive... I try to use other machinery that work better (moulding machine etc...)

Bob

[knight_toolworks]

have a buddy working it out. will post soon.