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-   -   Best Drivetrain (http://www.chiefdelphi.com/forums/showthread.php?t=67367)

cooker52 06-06-2008 10:27
Re: Best Drivetrain
 
Looking at it, I'd love to. Taking it apart and using it in FIRST, that might be difficult. Using the concept on a robot, very probable. Thinking about it, you could have the whole setup like a normal wheel, and then make the platform yaw left and right to turn the bot. This could get you down to two casters on the back of the robot for stability, and then you would have a pretty cool robot to show off.

Traction may be an issue, though...

AmoryG 06-06-2008 14:33
Re: Best Drivetrain
 
Quote:
Originally Posted by T3_1565 (Post 751664)
you might have a little more manuverability with balls but I can see less pushing power as a sarcafice. I still think it would be mega cool to do. You would have to think of the balls material very careful and find the best balance of grip and slip lol.
Well, like I said before I'm trying to create a fairly simple design and as far as I can tell there would be no sacrafice of power. And the ball surface would be similar to bicycle tires.

sgreco 06-06-2008 15:43
Re: Best Drivetrain
 
Quote:
Originally Posted by AmoryG (Post 751554)
Now I've done searches, but I've never seen any team attempting a "ball drive" drive train. It might be under a different name, but it's simply a drive train that uses spheres for wheels. I've tried to think of a few ways of doing this, but because I have no examples to follow I can't say any of my ideas would work.

With spheres you could rotate the ball in different directions without having to rotate the thing that holds the ball inplace. The ball wouldnt have to be a complete sphere.

Has anyone tried to do this successfully?
I don't know if anyone has done this successfully, but I have never seen it done successfully. Most teams that are looking for motion like that would do a swerve drive or use mecanum wheels.

Madison 06-06-2008 15:48
Re: Best Drivetrain
 
Quote:
Originally Posted by AmoryG (Post 751554)
Now I've done searches, but I've never seen any team attempting a "ball drive" drive train. It might be under a different name, but it's simply a drive train that uses spheres for wheels. I've tried to think of a few ways of doing this, but because I have no examples to follow I can't say any of my ideas would work.

With spheres you could rotate the ball in different directions without having to rotate the thing that holds the ball inplace. The ball wouldnt have to be a complete sphere.

Has anyone tried to do this successfully?
This isn't quite what you're describing, but take a look at this thread - http://www.chiefdelphi.com/forums/sh...ght=hemisphere - for an interesting drive idea that's similar.

AmoryG 06-06-2008 16:09
Re: Best Drivetrain
 
Well, my the fact that swerve drive and mecanum wheels have already been used in quite a few robots before hand makes it clear that one of the reasons so few have tried to create a ball drive robot is that it just hasn't been proven effective. As I said before it's impossible to know until a good example of it has been made. By a good example I mean a ball drive robot that ONLY uses balls and doesn't use any wheels to help it move.

M.krass, that's an interesting idea. I'll take a better look at it later.


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