On Tue, 2009-05-19 at 17:32 -0700, Kirk Wallace wrote: > Here is a spreadsheet that calculates the points along an involute: > http://www.wallacecompany.com/machine_shop/gears/involute-1b.ods > (Short URL) http://alturl.com/c4gj > > This only describes the shape of a tooth face relative to the gear's > base circle. I need to figure out how to handle tooth width, root > diameter, outside diameter and others.
I dropped in on the folk at Synergy the other evening and they demoed gear design for me. Answer a few questions like number of teeth and so forth and it draws it up and then writes the g-code depending on your cutter. They don't have a rack gear routine (yet) but we played with that a bit and it looked like the sides of the teeth are flat faced where the exact angle and distance between are a product of the nature of the gear running in them. The rack's tooth profile is certainly not a simple negative of the involute tooth of the gear that runs in it. It was an interesting thought and drafting experiment but I stayed well short of the real math to make 'em. Rayh ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
