Scan a model from a real-world object?

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flatline403
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Joined: Thu Jun 07, 2012 9:09 pm

Scan a model from a real-world object?

Post by flatline403 » Thu Jun 07, 2012 9:15 pm

I just ordered a ShapeOko kit in the last big order from Inventables. I'm new to CNCs, I've always just used a manual, hand-crank Mills.

Is there a way to "scan-in" a real-world object and create a model from that scan, so that the model can then be fed back into a ShapeOko to copy the original object?

It seems like a ShapeOko equipped with a number of sensors would be able to perform this task.

What is this sort of thing called, and has a method been established for hobbyists to do what I'm talking about?

edwardrford
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Location: Dixon, IL
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Re: Scan a model from a real-world object?

Post by edwardrford » Thu Jun 07, 2012 9:22 pm

It's called a digitizing probe. Here's a video: http://www.youtube.com/watch?v=XJBpjddTfrA

This is where you set an object into the work envelope, then your machine moves in pre-definied increments going across in the X axis, then back in the Y slightly, then back across in the X. At each increment the Z-axis lowers until it runs into the object. While it's working, the program keeps track of the X/Y coordinated and the z-axis depth, essentially building a 3D model of points.

I've never used one, but have watched / read in extreme jealousy as others have built their own and used them. Would be a cool project to adapt to shapeoko. Here's one I've looked at before:http://www.brusselsprout.org/cnc/1p-probe/

-Edward
Shapeoko 1 #0 - a couple of upgrades.
Shapeoko 2 #0 - a couple of upgrades.
Shapeoko 3 #2 - Stock

flatline403
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Joined: Thu Jun 07, 2012 9:09 pm

Re: Scan a model from a real-world object?

Post by flatline403 » Thu Jun 07, 2012 9:56 pm

Thanks Edward.

How much work do you think would be involved in adapting one of those for ShapeOko?

The SW side I'm sure is where the difficulty lies...

PLHS54
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Joined: Sun Apr 22, 2012 7:36 pm

Re: Scan a model from a real-world object?

Post by PLHS54 » Thu Jun 07, 2012 10:30 pm

You can also take a look at http://www.david-laserscanner.com/ It's free too! *with some restraints, but will get you started

Max Metz
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Joined: Sun May 20, 2012 11:55 am

Reconstructme

Post by Max Metz » Fri Jun 08, 2012 1:16 am

Another approach seems to be using Microsoft Kinect (x-box) or Asus Xtion sensors under Microsoft Windows with the German software Reconstructme, looks impressive. http://reconstructme.net/

Recontructme appears to be free for non commercial use.

The software enables 3d scanning captures in real time, from a face to a car, scanning around an object or room produces a model in scalable 3d metric space. The model is then exportable to common 3d formats such as 3ds, obj or stl. Best regards. :D

DanMc
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Re: Scan a model from a real-world object?

Post by DanMc » Fri Jun 08, 2012 10:36 am

Autodesk's new and free 123D also has a capture feature using a standard digital camera.

I've been using the David laser scanner. To get really good scans you need to put together a rotator for the laser and maybe a turntable, but now that you have a Shapeoko that shouldn't be a big deal :) I'm putting one together right now, if anyone is interested in the files I could post them.

flatline403
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Joined: Thu Jun 07, 2012 9:09 pm

Re: Scan a model from a real-world object?

Post by flatline403 » Fri Jun 08, 2012 7:22 pm

Hey PLHS54,
Where do you see that the David Laserscanner is free? Everything I see on their site says it costs something like 600 Euros.

Right now I'm thinking the Kinect with Reconstructme is the most attractive option, but I suspect the David is more precise.

PLHS54
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Joined: Sun Apr 22, 2012 7:36 pm

Re: Scan a model from a real-world object?

Post by PLHS54 » Sun Jun 10, 2012 7:27 pm

Here is the link, it should work. http://www.david-laserscanner.com/?section=Downloads It's the one at the top version 3.4.0.3008 Hope this helps

jrsteensen
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Joined: Mon Jun 11, 2012 9:29 pm

Re: Scan a model from a real-world object?

Post by jrsteensen » Thu Jun 14, 2012 8:27 pm

David laser scanner software is free. You can use just about any quality web cam and just go down to the hardware store and buy the cheapest laser line/level they sell. Set up a couple pieces of plywood and Bobby is your uncle! I've used it quite a bit for complex CAD models.

dougal
Posts: 31
Joined: Mon Apr 14, 2014 10:15 pm

Re: Scan a model from a real-world object?

Post by dougal » Tue Apr 15, 2014 4:03 pm

Hello all from Bristol, UK

At work we are using http://skanect.occipital.com/ for quick and dirty base mesh generation, i'm going to borrow an xbox kinect to clone some motorbike parts somewhen soon.


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