Sloped Curve

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Keith Larrett
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Sloped Curve

Post by Keith Larrett »

The attached image almost shows what I'm trying to create. Two tool paths, both molding toolpath. The first one cuts the material at an angle which is fine. The second one cuts a large cove, but it is supposed to follow the slope.

I tried model>create component from toolpath preview after previewing the first molding toolpath, but there is no option to project onto 3d model prior to running the second molding toolpath.

Am I going about this the wrong way? Any ideas would be appreciated.
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sloped curve.jpg
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4DThinker
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Re: Sloped Curve

Post by 4DThinker »

The moulding toolpath alone doesn't create 3D objects. After simulating the slope you CAN turn it into a 3D component which you can then map your cove to.

Another strategy would be to prop your board up so the slope side would end up being horizontal. Then cut the cove across it with no need to map it to a previous toolpath.

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dealguy11
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Re: Sloped Curve

Post by dealguy11 »

The moulding toolpath is a nice tool, but this is the kind of thing the older modeling tools were made for. I modeled this with 3 components:

1. A rectangular base created with the "create shape from vector outlines" tool, combine mode "add"
2. A slope created with the 2-rail sweep tool, combine mode "add"
3. A cove created with the 2-rail sweep tool (actually created an arched piece to keep it simple), combine mode "subtract"

Once created, use the 3d roughing and finishing toolpaths to carve.

Here are the vectors and shape:
Attachments
Tilted cove vectors.JPG
Tilted cove.JPG
Steve Godding
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ohiolyons
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Re: Sloped Curve

Post by ohiolyons »

Steve any chance of posting the file so we all can play?

Just pressed two rail sweep button as I expected I need two rails. Did you omit some details?
John Lyons
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ohiolyons
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Re: Sloped Curve

Post by ohiolyons »

OK I think I figured it out but not certain what your base model was used for
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incline cove.jpg
John Lyons
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ohiolyons
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Re: Sloped Curve

Post by ohiolyons »

here is my file

I just did a

2 rail on incline like Steve did

and

2 rail on the cove like Steve did
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inclined cove.crv3d
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John Lyons
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dealguy11
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Re: Sloped Curve

Post by dealguy11 »

You're right, don't need the base if you make the sweep vector the right shape. I was in a hurry so just did the parts in the way they came to mind.

The rails were in the picture I included - there were 2 sets around the part (vertical for the triangle, and horizontal for the cove) so it just looks like a rectangle.
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ohiolyons
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Re: Sloped Curve

Post by ohiolyons »

I didn't see them as 2 set of vectors. When you said create the base I drew a rectangle.

After I made the post I drew two set of vectors where the rectangle was and BAM!

I love these random questions of how would you do this!! Forces you to put your thinking cap on!
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dealguy11
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Re: Sloped Curve

Post by dealguy11 »

That's why I try to describe the process and don't usually include files with my responses. If you do the work to set up the part for yourself then you'll remember it a lot better than if someone just provides the end result.
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Keith Larrett
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Re: Sloped Curve

Post by Keith Larrett »

Thank you both for the help!
4DThinker wrote:Another strategy would be to prop your board up so the slope side would end up being horizontal. Then cut the cove across it with no need to map it to a previous toolpath.
Yes, think outside the box. In this case, I could cut the cove on a flat side and then take it to the bandsaw to cut the slope on the other side.

dealguy11 wrote:The moulding toolpath is a nice tool, but this is the kind of thing the older modeling tools were made for. I modeled this with 3 components:

1. A rectangular base created with the "create shape from vector outlines" tool, combine mode "add"
2. A slope created with the 2-rail sweep tool, combine mode "add"
3. A cove created with the 2-rail sweep tool (actually created an arched piece to keep it simple), combine mode "subtract"

Once created, use the 3d roughing and finishing toolpaths to carve.
I don't have much experience with the 2 rail sweep, but following your description, I was able to create the model. Thanks.
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Keith Larrett
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Re: Sloped Curve

Post by Keith Larrett »

I wanted to post a follow up as I appreciate the time and help offered to my question.

I figured out how to model and toolpath the piece as a 3d cut. (first preview picture). However, I ended up cutting it as a 2d cut using the molding toolpath (second preview picture). Once cut, I took the piece to the bandsaw and cut the base at the angle required.

The biggest reason I did it this way was machining time. Running the molding toolpath took less than 20 minutes including the time at the bandsaw. Running the 3d file would have taken an estimated 60 minutes.
Attachments
flagpole mount_3d1112.jpg
flagpole mount_2d1112.jpg
img_20171210_1440541112.jpg
https://www.syzygywoodworks.com

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