Have you looked at geargen11 it is an old DOS program should still be available someplace.
At 09:34 AM 5/20/2009, you wrote: >On Wed, 2009-05-20 at 04:44 -0500, Ray Henry wrote: >... snip > > 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 > >The rack tooth form is the basis for involute gears, everything else >comes from this. The rack form is described in Machinery's handbook and >here: >http://www.sdp-si.com/d785/html1/D785T007_2.html > >The straight sides are at the pressure angle (20 or 14.5 degrees >usually). This trapezoidal shape, as a hob, fly cutter, or standard #8 >gear cutter, can be used with an A axis to cut all of the gear diameter >sizes with the corresponding pitch. The other key feature, is the base >circle which is derived from the pressure angle lines placed with their >intersection on the pitch circle. >http://www.sdp-si.com/d785/html1/D785T018_1.html > >The diagram shows one pressure angle line, the other is just a mirror of >it. The point(s) of contact are on this line and since the line and >contact point can be thought of as an unwinding string, the sum of the >contact points forms an involute of the base circle. > >I have Synergy, but I am trying to come up with an open-source gear >utility. I have a way to go. >-- >Kirk Wallace >http://www.wallacecompany.com/machine_shop/ >http://www.wallacecompany.com/E45/index.html >California, USA > > >------------------------------------------------------------------------------ >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 ______________ Andre' B. ------------------------------------------------------------------------------ Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers & brand creativity professionals. Meet the minds behind Google Creative Lab, Visual Complexity, Processing, & iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian Group, R/GA, & Big Spaceship. http://www.creativitycat.com _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
