Electric Vehicle C

[packer-backer91]

we just had our regional compaction and was disappointed with the score we got (197) we are having trouble with the Left and Right constancy but we are able to get perfect distance score's on both runs and were only off .5 cm to the Right. That was still good enough to get 1st though but mostly I see that people are having problems with the left and Right because the vehicles have to be smaller than they were last year but I what to know if what people are using for wheels now (we have tried a many combinations of materials and nothing seems to be solving the problem)

[rman]

I just got back from the NY states tournament. I got gold in EV and beat FM by one place (yay). The distance was 7.6 meters and I predicted a 45.0 second run time.

The first run was way off, but I was right on the line and got one or two millimeters to the right on the second run. If I got perfect distance and perfect time score, that would be a 199.8 or 199.9.

As far as I know, I got 45.0 seconds for both runs, but since it was the event sup counting down, I'm not really sure if they got the same time I would have gotten in practice or at regionals. Also, my vehicle has a slow start (to prevent slip), and it takes like 200 or 300 milliseconds for it to start moving after I hit the button. So, depending on whether the timers started at the rules' definition of Measured Time (at 4. d in the rules) beginning when the vehicle starts moving, or when I pushed the button, I may have gotten more or less than 45.0 seconds.

I don't think I'll ever get the full scores back, but I'll post a video, documentation and such soon.

I was wondering. Since the rules say the maximum time allowed is 45 seconds, what happens if your vehicle ran 45.01? Would that be a second tier? I just looked at the rules and they say that you can "predict a time of up to 45 seconds", so I guess that would be interpreted to mean that the maximum prediction is 45 seconds but that the vehicle can run longer or shorter then 45. I wonder is anyone has had a problem with an Event Coordinator feeling that the rule means no run time over 45 seconds is allowed?

[andrewwski]

Correct, it can run longer than 45 s, but you cannot give a predicted time that is longer. In your case you'd lose .01 point for being .01 s off.

[Mike4192]

Official results were posted today for NJ states, and it seems my electric vehicle ultimately placed at least in a medal position (6th), so the positions were changed. Although we probably wont get any medal now, at least our appeal did not fall on deaf ears.

[ahage16]

gh, is there anywhere I can read more about programming things the way you did, not necessarily for electric vehicle, just electronics in general? I've been looking at it seems that I can find bits of info here and there, but no where to really learn what I am doing. I could buy some vex parts and everything would probably work really well, but that seems like it would defeeat the purpose of all of this because I think it would be really easy

[sachleen]

gh, is there anywhere I can read more about programming things the way you did, not necessarily for electric vehicle, just electronics in general? I've been looking at it seems that I can find bits of info here and there, but no where to really learn what I am doing. I could buy some vex parts and everything would probably work really well, but that seems like it would defeeat the purpose of all of this because I think it would be really easy

I use vex and it's pretty easy to do (for me at least) but you still have to know how to write the code to do it, doesn't matter what you're using. Go to http://www.instructables.com/ for cool DIY stuff.

[Paradox21]

I am using a Lego NXT and my vehicle is built out of legos. My biggest problem is that the vehicle curves. I am using solid axles and all my wheels are the same size. I am not entirely sure what is causing it to curve. Has anyone else had this problem with legos? Can anyone tell me how to fix it?

[sachleen]

I am using a Lego NXT and my vehicle is built out of legos. My biggest problem is that the vehicle curves. I am using solid axles and all my wheels are the same size. I am not entirely sure what is causing it to curve. Has anyone else had this problem with legos? Can anyone tell me how to fix it?

aiming it straight at 10m, how many cm is it off left/right? If its only a few, you need to just launch in a manner where it curves back so it stops while its on the center line.

Anyway, my comp is tomorrow, not much time left, a lot of work to do...

[Paradox21]

I am using a Lego NXT and my vehicle is built out of legos. My biggest problem is that the vehicle curves. I am using solid axles and all my wheels are the same size. I am not entirely sure what is causing it to curve. Has anyone else had this problem with legos? Can anyone tell me how to fix it?

aiming it straight at 10m, how many cm is it off left/right? If its only a few, you need to just launch in a manner where it curves back so it stops while its on the center line.

Anyway, my comp is tomorrow, not much time left, a lot of work to do...

If I line it up ideally then over a 10 meter course it goes about 5cm to the right of the line and ends 5cm left of the line. It is really bad.

[obxer22LWSCIOLYrocks]

Is anyone using a robot that is not a lego robot?