Re-creating a molding profile

[WillAdams (William Adams (Carbide 3D))]

The topic of (re)creating molding profiles came up at:

CC Pro - What do you want to make in 3D?

[image] This is just a generic thought that would address many issues with creating parts and reliefs in CCP. In this example, could you make us a picture frame using this profile? I can’t seem to change radii to a contour like the middle section of this trim; a tight radius built up on one side that blends to a much wider-radiused valley. I’ve only achieved this by creating an extruded part on freecad, then exporting an stl image, with varying degrees of success.

with an image:

and since the tool with a bearing may not be used on our machines, the profile may be re-created with a bit of patience and some No Offset Contour toolpaths w/ appropriate tooling (and of course, if one has an appropriate radius tool, it could be used as noted above.

First, import the pixel image:

and then re-draw the profile:

Using Node editing to adjust the curves as desired:

(for more on Node Editing see: 2D Drawing | Design into 3D )

If need be, adding a point (say at a point of inflection)

Smooth and adjust until one arrives at:

Then use Node editing and Trim Vectors to reduce the geometry to only what is needed:

(or draw in new geometry using existing nodes)

OK

OK

which may be Joined:

Then use this geometry, and drawn up profiles of tooling to re-create the profile using the techniques from:

Spoon Possible without CC Pro?

I’d like to make a wooden spoon and was wondering if that’s possible to do with the standard CC? Can it be done with a bowl bit? I don’t have one but can pick one up. Thanks!

Making a base for a model

Given a prototype base: [image] How to make it in Carbide Create? First, we have a pixel image with some dimensions: [F-86 base scan with measurements] We import that into Carbide Create: [image] using “Set Background”: [image] and adjust for size: [image] [image] It’s then a matter of drawing and toolpaths and so forth (we will try to do it w/o Create Pro, but will also show that). For reference, there is an overhead view as well: [DSC00036]

If anyone needs assistance with that, post a screen grab showing where the difficulty arises and we will walk through it.

Here is the current state as a v7 file:

Molding_profile_v7.c2d (640 KB)

[WillAdams (William Adams (Carbide 3D))]

For using an actual tool see:

https://community.carbide3d.com/t/using-unsupported-tooling-in-carbide-create-roundover-cove-radius-bits/43723/10

[Tod1d (Tod (with 1 'd'))]

Since the request was posted in a “3D Modeling” topic. Let’s see you model it

Yes, I’m working on it too. Might be possible, but rather tedious.

[WillAdams (William Adams (Carbide 3D))]

Easily done.

Re-arrange things assuming an 0.25" Stock Thickness:

Draw up the tooling which will be used in profile:

Then position each relative to where it would need to be to cut the profile, duplicating as necessary:

Repeating until one arrives at:

Then one draws in a line of the desired length:

Positions it relative to one of the tool outlines:

Determines the Max Depth:

and assigns a suitable toolpath:

Repeating for each until one arrives at:

Attached as a v7 file.

Molding_profile_v7.c2d (696 KB)

[Tod1d (Tod (with 1 'd'))]

Great illustration of the “Spoon without Pro” method.

But I was challenging you to build a 3D model in CC Pro. (In your spare time, of course )

[WillAdams (William Adams (Carbide 3D))]

It would be much more straight-forward to just extrude the profile after drawing it up as was done for:

Making a guitar bridge for Carbide Create Pro

as requested on support… Given a file in Carbide Create which describes a guitar bridge: [image] there are a couple of different ways which this part could be made: draw up contour geometry and assign toolpaths to appropriate depths (note that this does not require Carbide Create Pro): Spoon Possible without CC Pro? model the design in a traditional CAD tool, export it as an STL and then import that STL into Carbide Create Pro and then cut that 3D model using Carbide Create Pro: Instru…

[UzerNaim (Scott)]

Thanks Will. I have already achieved profiles through freecad and imported the STL.

@CC Pro - What do you want to make in 3D?

I’ve only achieved this by creating an extruded part on freecad, then exporting an stl image,

This thread said to share what we’d like to make WITH CCP, so my specific question was how to create a 3d profile that varies in radii

@CC Pro - What do you want to make in 3D?

tight radius built up on one side that blends to a much wider-radiused valley

Perhaps a better example would be a 30caliber cutaway;

Make an oblong long radiused section with a cylindrical midsection, then two tight radiused reductions at the boat tail.
Sure, we could spend hours assigning toolpaths at 100 different heights for different layers, but that’s what we pay your program for. To build the basic model with flat, angle and round surfaces then do a reciprocating toolpath like a printer. Not ideal, but it suits most of my needs.

[WillAdams (William Adams (Carbide 3D))]

Again, the most expedient thing there would be to draw the profile, then import it into a 3D CAD program and rotate it.

Whether or no Carbide Create Pro can become a full-fledged 3D CAD program is a separate discussion — I’m just here to show folks how to make stuff.

[Tod1d (Tod (with 1 'd'))]

OK, for academic’ sake I came close…

Took a bit of creativity in the adding & subtracting of model components.
And it’s not an exact match, but the best-fit of primitive shapes (arcs & lines) -vs- “B” curves.

moulding.c2d (464 KB)

[Graham (Graham Murray)]

Will/Tod, I have a couple of real miserable wet and cold days ahead and I am going to get my head around these and hopefully get a profile that works for me.

[UzerNaim (Scott)]

So it can be done!? That’s the kind of use of the CCP 3D components I was suggesting, Tod1d! There’s a method to overlapping the angle&round components to arrive at a varied radius. I’ll have to play around more, but in my early attempts there was little hope. Thank you for proving the basic 3d modeling on this software is capable of doing more than we expect.

[antimattr (Matt Jordan)]

@WillAdams

Draw up the tooling which will be used in profile:

Can you please explain this step? Where does this tooling come from?

[WillAdams (William Adams (Carbide 3D))]

Tooling:

Left → right:

1/4" square endmill, 1/4" ball-nosed endmill, 90 degree V endmill, 60 degree V endmill, 30 degree V endmill

Or:

#201, #202, #301, #302, #45771-K 30 degree engraver (from: Amana AMS-115-K: 2-PC CNC Signmaking - Carbide 3D )

[antimattr (Matt Jordan)]

@WillAdams

Left → right:

1/4" square endmill, 1/4" ball-nosed endmill, 90 degree V endmill, 60 degree V endmill, 30 degree V endmill

Oh. I think I figured it out. When I first saw it I thought you were using some feature of CC that I didn’t know was there but now I am looking closely at your example file …

You created those vectors in the screenshot just to point out which tool goes where, but they weren’t “functional.” Then when it comes to actually making the cut you use vectors that are just straight lines with contour cuts at various depths with the different tools to re-create the profile of the molding? Interesting. I wouldn’t have thought about that …