Quote:
Originally Posted by Greg Needel
One of the first things I do when designing a transmission is similar to you I take a look at the ratios I want to achieve and then make a spread sheet of the available gears and their pitch diameters. Using this info I can play with gear sizes to obtain the desired ratios.
When going to CAD the transmission I recommend not doing the teeth features to start and just making cylinders that have an outside dimension of the pitch diameter.
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Quote:
Originally Posted by JVN
I typically design using cylinders at PD (as Greg described). I end up changing my gearing approximately 100,000 times during each design process so these approximations make my life way easier.
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That's how I worked out the spacing and gearing of my dual CIM gearbox that I designed. Getting the drawings off of the suppliers website might be your best bet in terms of inventor, however [Solidworks fanboy] SolidWorks Toolbox feature has a great gear, sprocket, etc creator that works very well, so if you are looking to make your own drawings that is your best option [/fanboy]
be sure to check your math and measurements and use the tools available to you, such as the JVN calc. Happy CADing!
It definitely looked like a penalty, but in FRC if it looks like a penalty and smells like a penalty, well, unfortunately it might not be. - Basel A [more] 
17-06-2008, 23:39
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