Cadalyst - May 2008 - (Page 28)

casestudy Hot Tip Harry is back in print! Enter your AutoCAD tips in Hot Tip Harry’s 2008 Hot Code Contest for a chance to win a trip to Autodesk University 2008! Brought to you by Submit your original AutoLISP and VBA routines and custom hatch patterns to Cadalyst’s “Hot Tip Harry” for a chance to win a trip to Autodesk University 2008 in Las Vegas! Plus, each month, Hot Tip Harry awards an ofﬁcial Cadalyst T-shirt to every published tip author and sends a $100 cash prize for that month’s “Top Tip.” Got code? Hot code? Email it to: and used Adobe Photoshop to clean up the photos before saving them as JPEG images to be traced later with AutoCAD 2007. Photographing the building presented challenges because of its location in the city’s historical center. Wedged between other buildings, the synagogue was difficult to photograph, and the team was able to thoroughly document only one of its exterior facades. After the large parts of the temple had been assessed with basic measuring tools, the columns and their very ornate capitals were surveyed by use of RE. CRP Technology, an established company based in Modena that offers machining, rapid prototyping, and RE services, stepped in to assist with that portion of the project. To obtain a mathematical description of the capitals, CRP used a portable, seven-axis Faro CMM Platinum Arm equipped with a Faro Laser Line Probe optical system (figure 3). The system, which was attached to a scaffolding structure placed at the side of the capital, had a spherical measuring range of 3 meters and a scanning speed of 19,200 points per second. This system was chosen because it allows contact measurements and optical scanning to be performed simultaneously inside the same reference system while avoiding damage to the object being measured. The Process Measuring the surfaces of the capital, which took approximately 1 hour, generated a 3D point cloud that reproduced the shape of the capital in a CAD environment with a measuring error of roughly .1 mm (figure 4, p. 30). To avoid having a file that was too dense, the resolution (the distance between the points captured harry@cadalyst.com For more information about Hot Tip Harry’s Hot Code Contest, visit www.cadalyst.com/harry2008 Visit Harry online at www.cadalyst.com/harry2008 Figure 3. The light weight of the measuring arm plus its extensive degrees of freedom enabled measurements of complex, hard-to-reach parts. 28 www.cadalyst.com cadalyst May 2008 http://www.cadalyst.com/harry2008 http://www.cadalyst.com/harry2008 http://www.cadalyst.com/harry2008 http://www.cadalyst.com/harry2008 http://www.cadalyst.com

Table of Contents Feed for the Digital Edition of Cadalyst - May 2008

Cadalyst - May 2008 Contents Editor's Window Cad Central A Solid Job in AutoCAD Today’s Power — Quad-Core Workstations Performance — Tomorrow’s Possibilities Reverse Engineering an Antique Italian Treasure Trends in Reverse Engineering NextEngine 3D Scanner — Reverse-Engineering Tool Setting CAD Standards Fight for Your Hardware Rights The Jack and Jill of Ergonomics Technology for Civil Infrastructure Cad Cartoon Issue Indexes Shortcuts and Solutions

Cadalyst - May 2008

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