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Unread 07-08-2013, 14:40
Brandon_L Brandon_L is offline
Back @ it again with the white vans
AKA: Brandon Liatys
FRC #2180 (Zero Gravity)
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Re: Drive Train Choices

Quote:
Originally Posted by bardd View Post
I'm assuming not owning a mill. I don't know how common they are in the USA, but I know many people there I talked with don't have such equipment, and in Israel only 3-4 teams have them (that I know of, but knowing the teams in Israel I highly doubt a team I didn't ask has one). If you have a mill, than yes, the job's easier.

What I meant by it being more complex is not being hard to design as much as 4/6WD being very easy. I mean, if you have the drive base parts, you can build a drive base without even having to think about it, and I'm not talking only building the KOP by instructions: we've been using KOP parts for our custom drives every year since we started, excluding 2010 and 2013. None of these drives were ever CADed, or even pre-thought of ("let's put plaction wheels, I heard they're better" was usually the most discussion about it before actually building). Only one of these drives ever failed, and even that was because we got the wheels super-late and didn't have time to place them properly.
With dropped 8WD, you obviously can't do that. Not saying it's a good practice to do that, and I really don't like the concept of doing that (the reason we didn't do that this year), but the fact it can be done shows how much easier it is to get a 4/6WD than 8.
We did not use a mill, nor do we own one. Just carefully measured and drill pressed. Not really an exact science and could be done better but we never had an issue with it.

As for more complex, its not at all. If anything maybe even easier because you can just plop the gearbox/motors dead center in your bot. you just double sprocket the two inner wheels as you would a center wheel on a 6wd.

Quote:
without even having to think about it
wheres the fun in that? The only thought that went into ours was wheel spacing, because we wanted to make sure we could clear the bump with no issues (beaching ourselves on it, breaking chains, ect) which we just did some simple geometric drawings in CAD for, not even a full 3d model. If it werent for that, you can pretty much just evenly space them.
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FRC 2495 - Hamilton West Robotics [2007-2014] - whats a..."hive mind"?
FRC 3929 - Atomic Dragons [2012-2013]
FRC 2180 - Zero Gravity [2017-]

Just trying to collect all the possible team colors

Last edited by Brandon_L : 07-08-2013 at 14:46.