CAD Challenge/Comparer [1] - Pinion Pattern Edition from IGES Model - Cog Pattern

[bejant]

I wonder what CAD program was used to create the original bevel gear. Opening the .iges file from the OP with my text editor (gedit) reveals this little tidbit:

Code: Select all

,,31HOpen CASCADE IGES processor 6.3,13HFilename.iges,                  G0000001
16HOpen CASCADE 6.3,31HOpen CASCADE IGES processor

[lukasubo]

Code: Select all

Open CASCADE 6.3

Oh word censored no, please. It's broken enough on 6.8 / 7.0 ...

[quick61]

The biggest problem with the original file is it was exported as type 144, and not as a B-REP solid, thus all the SelfIntersects in the model which OCCT/OCE has more than a little trouble with.

Cox seems to of come up with the easiest and most direct way with dealing with a type 144 IGES file like this, and other than the fusion process taking a few moments on my machine, (I have auto check geometry enabled), the construction of a valid solid with the desired features is rather quick. Nice job cox, +1.

So is anyone going to do the video for the comparison?

Mark

[quick61]

Here is the original part exported as an IGES B-REP solid, type 186/514. This object should prove much easier to work with than the original type 144 in the OP.

https://www.dropbox.com/s/q8n6cbscqdr6y ... .iges?dl=0

Mark

[bejant]

Mark, actually I could unzip the .7z file. I just didn't see the unzipped .iges file at first because it was dated June 10 and I had the files in that folder listed newest to oldest, so it was way down in the list. I was expecting it to be at the top.

So is anyone going to do the video for the comparison?

I have one here: https://youtu.be/lGI8tjve0bE

[bejant]

Seems that block select or selecting from the tree dies not work in Shapebuilder, had to click every face.

Yeah, shapebuilder needs attention.

Yes, it would be handy to be able to select them from the hierarchy tree and/or box select in the 3D view...

[quick61]

Seems that block select or selecting from the tree dies not work in Shapebuilder, had to click every face.

Yeah, shapebuilder needs attention.

Yes, it would be handy to be able to select them from the hierarchy tree and/or box select in the 3D view...

It would also be handy to have greedy select for vertices, edges, and faces when ShapeBuilder was active, like Sketcher in edit mode. Having to hold the [Ctrl] key is not the most convenient when having to select more than a few.

Mark

[cox]

I have one here: https://youtu.be/lGI8tjve0bE

Nice video

Nice job cox, +1.

Thanks, quick61

For the selections in ShapeBuilder I think it could be useful eg. when using shell from faces, whatever objects you select the function would operate on all faces being part of or makes up the selected objects.

Having this, I guess it would be nice to have mesh to shell (or faces if the mesh is not in one peace)

[DeepSOIC]

I think this challenge will finally get me to writing a parametric upgrade for Lattice. Lattice already has a nice set of tools for parametrically working with sets of shapes (e.g. faces). For this challenge, I wanted to use FuseCompound to assemble shells, but for unknown reasons, OCC kept refusing to fuse most combinations of faces from this imported shape (usually it works just fine...)

[bejant]

I have one here: https://youtu.be/lGI8tjve0bE

Nice video

Thanks! (You can see I just retraced your steps)

I think this challenge will finally get me to writing a parametric upgrade for Lattice.

It's always interesting to see what you'll come up with next...