VIDEO of our bot moving
 

this is just a thrown together drivetrain to see how it handles on its own and everything. even on the slick tile it still was not too hard to accelerate.

http://tinypic.com/player.php?v=153886g&s=5

Re: VIDEO of our bot moving
 

How's the handling on that bad boy? Didn't look half bad, Keep up the good work. We are going to put the new wheels on last years bot and get some practice on the class room floor. :D

Re: VIDEO of our bot moving
 

it really wasnt that bad. im sure there will be a little difference on the actual playing surfaces. and with a trailer. but for bein like 30 pounds or whatever it was. it wasnt too bad. we just used a vex controller since our programmers are still playing with the new stuff. i tried getting the video on tile but it wont upload for some reason.. it accelerates pretty nice and doesnt slide around too much either. still maneuverable i will try to get another video to work. we tried pushing a trash can also.. not much luck there. we slid a lot then but that was probably the equivalent of another bot.

Re: VIDEO of our bot moving
 

second video. http://tinypic.com/player.php?v=4uxkwp&s=5

Re: VIDEO of our bot moving
 

It's not as hard to accelerate as I thought it would be.

I think with a heavier robot, you'd drift more (more momentum). Compare your video to our video: http://www.youtube.com/watch?v=u8aqjM1mmEs

Re: VIDEO of our bot moving
 

yea you do drift a bit more. but think about what that trailer will do. it will either help stop that or make it worse. or both depending on the situation. it can either slow or stop you from drifting or it can back it worse. hopefully we get a permanent frame set up and a manipulator built in the next week or two so we can do some trial and error.

Re: VIDEO of our bot moving
 

yeah yours drifts more... but it doesn't really look hard to handle to me... use drifting to your advantage...

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i think the team that devises a drive with a four wheel drive setup like a car will do very well. steering and driving like a car can help pull you out of those drifts

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Oh man, seeing these videos makes me really excited for this year! I can only hope there will be many pro-drivers that will be able to make their robots soar and make the slick movements.

Can't wait to be field reset at FLR and be so close to the action.

Re: VIDEO of our bot moving
 

something i noticed about your video is that your robot is the long and narrow set up. maybe if you try the wide and short it will help with the drifting. i think it will because you dont have as much weight slinging around

Re: VIDEO of our bot moving
 

We put some rover wheels on an old robot (not the greatest configuration to put 4 wheels on what was a 6 wheel drive), and put it on regolith. It was rather hard to accelerate, and I doubt it was because of how we had to put the wheels on (front and middle wheels). Because some weight had previously been taken off, we put two 50 pound weights on the robot (on the right and left sides, between the wheels). Turning was also difficult, and our joysticks will have to be scaled.

Re: VIDEO of our bot moving
 

can you post pics of when you did.

Re: VIDEO of our bot moving
 

I'll try to see if we can do it again, the robot's been put in the closet for now while we do design. We didn't take any video or pictures that I know of. I can say that it was actually difficult to get it to move since the wheels would slip pretty readily for us. By the way you can kind of kick it around transversely relatively easily.

Re: VIDEO of our bot moving
 

ok are you guys planning on going the narrow or wide orientation

Re: VIDEO of our bot moving
 

we were thinking more of wide

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thats what we're doing. we talked to the teacher for physics at our school and he said that it would be really hard to turn in the long and narrow orientation

Re: VIDEO of our bot moving
 

well the long and narrow makes you drift a ton will turning and that is a very good tool for turning

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Just so you know there is a big difference between that tile and the stuff they are actually using, we tested it.

Re: VIDEO of our bot moving
 

How different is it? could you send some sort of video or something?

Re: VIDEO of our bot moving
 

Have you done a test to see what CoF you have between the bot and the floor? A fish scale and some simple math can give you that number. I agree with some of the above posts, based on our robot tonight (150 and about 100 lbs, short and wide and skinny and long) you will skid quite a bit on the true surface. Good luck!

Re: VIDEO of our bot moving
 

All,

In addition, it is way different with the trailer. We had the same reaction when we just drove around our robot with no trailer. Then we built the trailer ... It is painful to turn that thing ... realy painful.

We also have the real floor and tile has at least double the CoF than the real floor. I will try to get video posted by tomorrow evening.

Paul

Re: VIDEO of our bot moving
 

Thanks a lot, that would be a HUGE help to everyone, to see a robot driving on the real floor with a trailer hitched.

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yes that would be HUGE please get it posted ASAP

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By real floor do u mean the regalif (or whatever its called)

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By real floor I mean the actual Glasteel brand 0.090" FRP with pebbled finish found at Home Depot.

Re: VIDEO of our bot moving
 

how much was each sheet of that stuff

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Here is a video of our '08 bot (with the '09 wheels attached) running on several sheets of regalith. I'm not sure where we got so much of it, but I can ask a mentor tomorrow. We had a "sort-of trailer" on, and it influences the driving quite a bit.

http://www.youtube.com/watch?v=JS_I0cRmGIE

Re: VIDEO of our bot moving
 

im excited to see some robots drifting like Tokyo drift and shooting like in the matrix, lol

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I just paid $33.00 per sheet at Home Depot. I did convince them to give me a 10% discount. :yikes:

Re: VIDEO of our bot moving
 

We got two sheets of the real flooring today-It is most definitely slicker than tile or smooth concrete You won't believe it until you test it. We got the pebbled stuff like they showed in the kickoff. You can put all your weight on a wheel, and it still skids easily.

Re: VIDEO of our bot moving
 

For those of you that have driven on this surface, what are the specs on the drivetrains? How many CIMs, what gear ratios, etc.

Thanks!

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We shopped around and were able to purchase it for only $24 a sheet at Menard's. Other local prices were as follows for Rockford, IL:

Home Depot: $27
Lowes: $25

Re: VIDEO of our bot moving
 

Unfortunately, to get a real feel for how the controlled acceleration and uncontrolled momementum will affect the robot and trailer, you're gonna need more than 1 sheet.

I'm getting the feeling that testing on anything other than that material will give you a false idea of what you will really be facing.

And in order to develop your game playing strategy it would be better to know just how manueverable you can expect to be, as well as the speed you will be able to move around at.

2 minutes may seem like alot, but it will go by quickly, when you are slipping and sliding & going no where fast.

The wildstang video is an interesting testiment to what to expect.
I wondering if that robot has the steerable powered wheels or not??

Re: VIDEO of our bot moving
 

So a good suggestion would be to team up with other teams in your area, pitch in with the costs and time for building a practice field, then set some days/times to drive around. Maybe invite other local teams that didn't pitch in.

That's GP.

Re: VIDEO of our bot moving
 

about the whole wide or narow thing, doesn't it say in the rules somewhere that the trailer has to be attached to the 28" long side of the robot? something I thought I heard our rules head or one of our mentors mention.

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AFAIK the only rule with the hitch is that it is a certain height from the ground and parallel with it (2 13/16" height??) and the tongue of the trailer can never touch the bot, only the trailers bumpers can touch your bot at any time.

Re: VIDEO of our bot moving
 

This is a very useful video, thanks Stang!

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:yikes: Wow dude this is sweet! Everyone finally can see how these wheels work! =D

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Thanks for the videos! Question though:

How was the Wildstang bot set up? Did the front and back wheels rotate all together or as pairs? I'm wondering how effective a swerve drive would be compared to a standard 4wd setup; could you compare the two by turning the "swerve" off and running it as tank drive? You could also easily compare the 4wd handling of a "short and wide" frame to a "long and narrow" one.

I expect the swerve drive to be able to turn and control the trailer much better, but 4wd is so easy to implement and I'm not sure swerve would be worth the extra work/weight/complexity for our team. Also, the time spent developing a swerve drive might be better spent on driving practice (for us).

Re: VIDEO of our bot moving
 

Here's a video Team 910 / the Foley Freeze shot tonight of our robot driving around on the FRP material with the new "slick" KOP wheels. We used the awesome new Team221.com Universal Chassis and for extra weight, we threw on four batteries. We're also using the new 2009 control system which is working out quite well for us so far.

Here's the link: http://www.youtube.com/watch?v=EeOg23c91As

Re: VIDEO of our bot moving
 

All of the videos so far are great! It's not quite as slick as I thought it would be, but robots are still going to be sliding all over the place during competition. It'd be nice if we could get shots of robots driving around with real game trailers to see how much driveability is affected.

Drivers are gonna need a bit of practice this year. :)

Re: VIDEO of our bot moving
 

anyone test from both the wide and narrow configurations yet?

Re: VIDEO of our bot moving
 

Thanks for the videos. It is not as bad as I expected. You are right about driver practice.