Chief Delphi - 2481 Drives Over the Bump with Mecanum Wheels

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kylelanman

22-01-2010 15:30

2481 Drives Over the Bump with Mecanum Wheels

At the beginning of the season there was discussion as to whether or not a mecanum drive could make it over the bump.....IT CAN!!!

http://www.youtube.com/watch?v=UzgTftW_Cow

Questions, comments and suggestions welcome.

MrForbes

22-01-2010 15:38

Re: 2481 Drives Over the Bump with Mecanum Wheels

Does not surprise me, as mecanum wheels work reasonably efficiently going forwards/backwards (especially if the rollers have a bit of tension).

Would probably work even better with carpet on the whole floor

gyaniv

22-01-2010 15:52

Re: 2481 Drives Over the Bump with Mecanum Wheels

Have you tried crossing the bump vertically?
I don't think it will work with mecanum wheel, but i would love to see if it does...
We are going on swerve drive, hope it will be much better then a mecanum wheel robot, cuz if it doesn't then so much will go down the drain...

the man

22-01-2010 15:56

Re: 2481 Drives Over the Bump with Mecanum Wheels

cool, we are using a tank drive belt, all i can say is that it turns on a dime and climbs the bumb.

Daniel_LaFleur

22-01-2010 16:06

Re: 2481 Drives Over the Bump with Mecanum Wheels

Quote:

Originally Posted by kylelanman (Post 904734)

2 questions:

1> Will the mechanums work if you don't hit the bump square?
2> Will that setup work with the bumpers (it looks close)?

kylelanman

26-01-2010 15:44

Re: 2481 Drives Over the Bump with Mecanum Wheels

Quote:

Originally Posted by Daniel_LaFleur (Post 904764)

2 questions:

1> Will the mechanums work if you don't hit the bump square?
2> Will that setup work with the bumpers (it looks close)?

We have not tried it. If it is not perfectly square then it swings around before the climbing motion starts.
According to our drawings and dimensions, Yes.

Quote:

Originally Posted by gyaniv (Post 904754)

When you say vertically are you referring to parking on the peak and then driving sideways across the bump? If that is what you mean then yes it works to do that.

the man

26-01-2010 16:06

Re: 2481 Drives Over the Bump with Mecanum Wheels

Quote:

Originally Posted by the man (Post 904756)

cool, we are using a tank drive belt, all i can say is that it turns on a dime and climbs the bumb.

I lied it only climbs the bump if the weight is on the front

Tony.Wu

28-01-2010 07:40

Re: 2481 Drives Over the Bump with Mecanum Wheels

what's up with the sloped top?

ParkerB

28-01-2010 13:32

Re: 2481 Drives Over the Bump with Mecanum Wheels

We were going to go with tank treads on our robot but the other vet (hito) and I said it was a bad idea, every time we have seen them used in precious competitions and every time they try to turn the robot looks like its having a seizure..... How does yours turn, "the man"?
The macanum wheels we've been looking into as well... but decided against with this years challenge, I guess we could have gone with them anyway.. Oh well, these things happen!

fordchrist675

28-01-2010 14:20

Re: 2481 Drives Over the Bump with Mecanum Wheels

What are you robot dimensions, more specifically what is teh amount of space between each wheel?

kylelanman

29-01-2010 16:36

Re: 2481 Drives Over the Bump with Mecanum Wheels

Quote:

Originally Posted by Tony.Wu (Post 908384)

what's up with the sloped top?

Quote:

Originally Posted by fordchrist675 (Post 908618)

What are you robot dimensions, more specifically
what is teh amount of space between each wheel?

I haven't got a clue.... The frame is near max size. The actual spacing of the wheels was determined by a student in Inventor. I'm a previous student and am technically a programming mentor. I had a phone with internet so I posted the video. If you want the exact dimensions I can find out and let you know.

fordchrist675

29-01-2010 16:49

Re: 2481 Drives Over the Bump with Mecanum Wheels

Quote:

Originally Posted by kylelanman (Post 909449)

We just threw our controls/electronics on a sheet of wood and zip tied it to the frame. We will have the controls mounted more permanently inside the robot by the time it is done. It is it an angle currently because the top of our kicker is present in the front of the robot but not the back of the robot.

I haven't got a clue.... The frame is near max size. The actual spacing of the wheels was determined by a student in Inventor. I'm a previous student and am technically a programming mentor. I had a phone with internet so I posted the video. If you want the exact dimensions I can find out and let you know.

I would very much appreciate that, because I'm curious to see how well our teams robot will do that, and I'd like to just compare robots

dag0620

30-01-2010 18:06

Re: 2481 Drives Over the Bump with Mecanum Wheels

Cool. Team 1071 is also using Mechanim wheels. While we have had allot of issues with the initial programming, once we got the bugs out we had no issues. I love working with them, and the feel of driving is incredible. Be weary though, without proper wait balancing and with poor driving, you will see some flipping of your robot, DAMAGING UR ELECTRONICS!

kylelanman

02-02-2010 00:53

Re: 2481 Drives Over the Bump with Mecanum Wheels

Quote:

Originally Posted by fordchrist675 (Post 909459)

I would very much appreciate that, because I'm curious to see how well our teams robot will do that, and I'd like to just compare robots

I'm told the the centers of the wheels are 26.5 inches apart from each other.

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