Gentle persons: Kirk and others may find the following references to be useful:
1) "The Involute Curve, Drafting a Gear in CAD and Applications," by Nick Carter. http://www.cartertools.com/involute.html 2) "Direct Gear Design for Spur and Helical Involute Gears," by Alexander L. Kapelevich and Roderick E. Kleiss. http://www.akgears.com/pdf/direct.pdf Regarding calculating tables of values of Kirk's representation of an involute of a circle, or any other parametric equations, don't forget that OpenOffice Calc is a fully functional spreadsheet application that has all the necessary mathematical machinery including trig functions like sine, cosine, and arctangent. OpenOffice is available for and runs in Linux, Winders, etc. Like Microsoft Excel, it can generate various forms of plots, although I personally don't like either for generating publication-ready graphs. It should be easy to code up Calc and/or Excel programs to automate the calculations discussed in the above papers. As for displaying mathematical functions easily, one can take advantage of the OpenOffice Math interface, but since I'm an old-fart (it's official, even the Social Security Administration says so), I use LaTeX, which has been around since the days when all we had were mainframe computers (and had to walk barefoot through the snow to hand over our punched card decks to the operator at the counter). Now that MathML is fairly mature, there is a lot of interest in MathML-based tools. See, for example, the following MIT pages on displaying mathematics: http://web.mit.edu/acs/faq/webmath/contents.html and http://web.mit.edu/ist/topics/webpublishing/mathml/ Finally, regarding the Machinery's Handbook, just find the cheapest price for any recent edition. I bought my 26th Edition (2002) copy on eBay in 2005 for about $35. With the exception of a torn fly leaf, it was in pristine condition. Sometimes eBay is cheapest, sometimes abebooks.com, sometimes amazon.com. Like everything else, you have to be patient. Regards, Kent ------------------------------------------------------------------------------ The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
