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#31
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Re: pic: Mecanum Musings
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They're quite solid as they stand, but I don't like leaving a wheel uncovered for any reason. For that reason I'll probably enclose the wheels, most likely in 1/8th aluminum sheet on which the bumpers will be mounted. |
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#32
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Re: pic: Mecanum Musings
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#33
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Re: pic: Mecanum Musings
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![]() Then you revolve it around that bottom line. After that you put a hole through the center for the bolt, then put recession into the roller for bushings. Last edited by CraigHickman : 23-11-2008 at 22:39. |
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#34
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Re: pic: Mecanum Musings
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To be a little more specific, I was referring to how you designated the actual arc on your sketch. Was it simply a large radius? A spline? If so, what did you use to define that spline, etc... Any more info would be awesome! Thanks again |
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#35
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Re: pic: Mecanum Musings
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#36
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Re: pic: Mecanum Musings
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I actually have my wheel 3d printed already and am making a silicone mold of it, and then using that mold to cast my own hubs and rollers! |
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#37
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Re: pic: Mecanum Musings
I would strongly suggest that you make your rollers out of some non-lubricating plastic, then dip them in a rubberized coating to make them sticky. You can get the coating dirt cheap at any hardware store (it's what you dip tools in to rubberize them).
I say that because machining softer grade rubbers can be a real headache for the machinists. They tend to tear - even the harder durometers. So they end up having to freeze them then rush them to the lathe to get them done before they thaw. Like I said - real pain in the neck. Plastic would be easier to machine, and in the end probably it would probably be cheaper too. A step up from that would be to have a machine shop machine a female mold that you could pour your own rollers from. That'd be cool and not too hard - heat plastic in pan till liquid and pour in. A bit like pouring those old lead army men into casts. |
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#38
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Re: pic: Mecanum Musings
From what he said, I believe he is going to do some sort of casting.
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#39
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Re: pic: Mecanum Musings
In the past our team has had molds 3d printed by the local community college. We would probably do the same this year.
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