Hi everyone!

In this instructable, I'll be showing you (in some detail) how to a make a 3D printed copy of a real object, starting with capturing it with 123D Catch, refining it using Meshmixer, and then printing using a Makerbot (or any other 3D printer).

You'll need:

Step 1: Prepare for Capture

The first step is to take a number of photographs (between 20 and 40) of your object, so that 123D Catch can assemble a 3D model. In this example, I've used my son's favorite teddy bear.

Here are some important tips:
  • Photographs should capture all sides of the target object, both all the way around, and top and bottom. A good approch is to take 20 objects all the way around, and then move up (pointing the camera down at the object) and take another 20
  • Choosing a smaller platform for the object helps capture more details from below. Notice how the bear is sitting on tiny circular stage.
  • The object should not be moved at all during capture, and lighting should remain consistent. In effect, once the object is in place, you should move around it
  • The target object should take up most of the frame: either get close to the object or zoom in
  • While it is not absolutely necessary to maintain the same distance from the object all the way around, it does help the algorithm if distances are consistent
  • Consistent diffuse lighting all around the object works best. 
  • Accurate focus is important - you will want to remove any out of focus shots
There are extensive tutorials available here: http://www.123dapp.com/catch/learn

So go ahead, take your pictures. If you're using the camera rig I referenced earlier, adjust the horizontal distance on the rig, and the camera zoom, so that the object fills the frame. Since the distance to the object will be consistent, you might want to focus manually.

When you're done taking pictures, save them all to a folder with a descriptive name.
<p>can you give an estimate of size are we talking Mb's , !00's of Mb's or Gb's it's something that I have to take in on a limited download limit</p>
<p>the actual size of the sample scan compared to the size of files scanned will vary how?<br>it will be shrunk or enlarged many times the actual size?</p>
Can this make a mirror image. .example. .you could print a part in a right or left hand model
<p>The tutorials for Catch have moved: http://www.123dapp.com/howto/catch</p>
Is there a NON-Interactive (command line) program that can take an OBJ file as input, identify all holes and fill them? I have a 3D scanner that correctly scans an object, but always leaves a hole at its base. I'm trying to avoid the manual step of firing up an interactive program just to fill the hole. If this can be automated, I can go directly from scanner to printer.
Buen Comentario, Gracias ! <br> <br>( He hecho un modelo 3D Print,y ha salido muy bien, <br> pero desde 3ds max,no aun desde 123d catch). <br> Me interesa pues es un programa gratis. <br> <br>Cual es el problema con las cargas al 123d Catch ? que parece no tan simple, <br>con su servidor ?. <br>Saludos, Gracias <br>
i have obj files i am interested in printing but they are often not manifold or they are not closed solids etc. can mesh mixer fix this automatically without destroying the overall shape.

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