3D Model of a Dime, Update

3D Model of a Dime, Update

Although Zeiss' CT scan data is exceptional, the 3D model is still a work in progress.

Zeiss provided multiple excellent scans of two plastic replicas of a Dime. The average resolution of the scans is .032mm (.0013"). While all the details are clearly visible (even John Sinnock's initials below Roosevelt's bust), the surface is a little noisy as if the Dime was made of fine sandpaper.

Using Rapidform XOR software, I've created a pretty smooth version of the dime, but have lost some details. You can still see the "JS", but not clearly. I've submitted a request for assistance to Rapidform. Hopefully, they'll be able to show me how to do a better job of smoothing the data to create a nicer 3D model of a Dime...

3D Model of a Coin

3D Model of a Coin

Using Zeiss' X-Ray Computed Tomography (CT) scanning service to create high resolution CAD model of a Dime (10 cent piece).

Normally, a Dime would not be a good subject for CT scanning; coins are relatively small with intricate detail and are made of dense metals. To get around the density issue, I used very low shrinkage silicone rubber to create molds of both sides of a Dime. I then cast urethane plastic replicas and sent the replicas to Zeiss for scanning. Careful vacuum degassing of the silicone and urethane was critical to capturing the intricate details.

Zeiss' Metrotom 800 CT scanner is able to capture very small details, as small as .01mm in some cases. It is also accurate to +/-.0045mm. The high resolution and accuracy coupled with the carefully crafted replicas should produce exceptional CAD models...