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Unread 05-11-2008, 02:58
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Teaching Teachers to Teach Tech
AKA: Jason Brett
no team (British Columbia FRC teams)
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Re: pic: 2009 Mecanum Hub - Team 1595

I think it may be possible for you to create a functionally, if not aesthetically, identical hub without using a 5 axis mill. In fact, it may be possible to do without using anything more than a good lathe, turret head mill, and indexing head.

I don't say this to discourage you from trying to get time on a 5 axis machine... go for it! It may be that given current economic conditions that some machine time is an easier donation for a shop to make than financial support. Rather I suggest this because one of the things I really like about FRC is that it encourages designers to think like builders... in other words, it doesn't matter how good it looks in CAD if you can't build it (quickly and efficiently) in real life!

Just as you've found it to be an interesting and useful exercise to design this hub, working in various machining constraints ("How can we make this without a 5 axis machine?") can make it an even more beneficial exercise. Talk to some machinists about what they can do with non-CNC equipment and you may be amazed.

Ooooorrrr.... why not go all the way down the rapid prototyping track and use a 3D printer and lost wax casting to go almost directly from CAD to metal?

Oh, right... no metal allowed this year.

Jason
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