The Illustrated Engine Turning Reference™

CAD CAM Engine Turning
Early CAD CAM Designs

The Crown and Cupid pens

These pens were based on pieces made by Montegrappa in the early part of the twentieth century, with rolled threads which are visible on the outside of the pen, so it was perhaps appropriate that they were used for our early CAD CAM work.

The Crown Pen

Crown Pen Octagonal Pen Cap, engine turned in panels.
 
This was another new departure, embedding 3D low relief in a more traditionally engine turned design, only possible with our system.
 
Unit cost about £18 UKP per pen, assuming an edition of 1,000 pieces in two batches of 500.

Box Lid Insert
A silver insert designed to be fitted to the top of the presentation box for the above pen. Unit cost about £15 per disk, for a run of 500 plus.

The Cupid Pen

Cupid Pen Cap
The first time a human figure, Cupid, was generated in the CAD system and reproduced in Low relief.
 
" It had been about two decades since I had drawn human figures on paper with pencil or charcoal. Suddenly I had to get it exactly right to professional standards in a new medium that nobody had ever used before. My personal comment is that the later drawings on the Milennium pens were much better, but this exercise taught me a great deal about how such complex images could be drawn in CAD. "
 
Price today, 2007, would be about £20 UKP per pen for a production run of 1,000 pieces. CAD drawing value included would have been about £4,000 UKP.

The indications of price are very approximate and don't include tooling.