3d NC topo map problem

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3d NC topo map problem

Postby edkeating1 » Wed Feb 06, 2019 4:01 am

First, I'm very new to all this so apologies in advance. I've been working with the attached V-Carve file and have successfully (to some extent) carved the 3d topo map of NC with a couple small problems.

When I preview the file, in the 2D view it looks like the (hopefully attached, this is my first post here) 2d Screengrab.
NC2dScreenGrab.PNG


But when I select a toolpath and preview in 3d, the river basins and some random areas around them entering the sound become inverted somehow which you can see in the (hopefully attached) 3D screengrab.

The original files came from the kind gentleman herehttps://makezine.com/projects/convert-geological-information-into-custom-map-fit-for-3d-printing-and-milling/.

I just can't figure out where I went wrong. If anyone has any ideas I'd be super-grateful. I fixed the first one with hand-carving knives, but I'd like to learn what I messed up.

Thanks!
Attachments
NC3D screengrab.PNG
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Re: 3d NC topo map problem

Postby edkeating1 » Wed Feb 06, 2019 4:08 am

OK, the CRV file is too big. Drat.
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Re: 3d NC topo map problem

Postby mtylerfl » Wed Feb 06, 2019 4:20 am

edkeating1 wrote:OK, the CRV file is too big. Drat.


No problem! Create a free DropBox account, upload your file to a Public Folder, then copy/paste the download link here.

Then your file can be downloaded for review.
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Re: 3d NC topo map problem

Postby Mike-S » Wed Feb 06, 2019 6:52 pm

Don't know why you're getting the reversed river beds. I tried the .stl file and it seems fine. You may want to apply smoothing and reduce Z so the mountains aren't so exaggerated. Give us a link to your file.
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Re: 3d NC topo map problem

Postby edkeating1 » Sat Feb 09, 2019 5:28 am

Thank you both for taking a look. I'm sure the problem is me...

Created a dropbox account and I think anyone with this link can get the file.

https://www.dropbox.com/s/fcia41u7fx8yy ... e.crv?dl=0
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Re: 3d NC topo map problem

Postby Mike-S » Sat Feb 09, 2019 11:26 pm

A couple things to try. In the finish tool path add a "Boundary Offset" of at least the radius of your finish tool, or try .2" You may need more to clear out Pamlico sound.
If V-carve has the option, create a boundary vector from selected component (the whole model of NC). And use that for your profile vector. Use as small an end mill as possible to keep the shoreline details.
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Re: 3d NC topo map problem

Postby adze_cnc » Mon Feb 11, 2019 6:19 pm

Mike-S wrote:Don't know why you're getting the reversed river beds. I tried the .stl file and it seems fine.


Ah, but did you use a 14" x 7" job size as the original poster did?

edkeating1: for fun, change your roughing toolpath to use a 1/16" end-mill and preview it. That should tell you why you are getting "reversed river beds".
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