02-02-2008 10:56

bloodknight2077

Re: pic: Our New Robot Frame

Nice robot design, but what if a ball lands on your electronics board??
I assume that there is more to this robot that isn't shown.

02-02-2008 11:40

Mr MOE

Re: pic: Our New Robot Frame

Nice frame / Design.

I love the color!

04-02-2008 00:11

comwiz7

Re: pic: Our New Robot Frame

Well, the arm isn't on there yet (obviously), but it will protect the electronics. Plus, since we are about 15 pounds underweight, we'll probably add a lexan cover to the electronics.

04-02-2008 00:18

Matt H.

Re: pic: Our New Robot Frame

Wow I like the time your spent painting your robot--this year looks to be very competative in the area of nice looking robots.
How's your center of gravity?

04-02-2008 00:27

comwiz7

Re: pic: Our New Robot Frame

Well we didn't want to lose two days to powder coating, but they were doing it for free and now our robot is awesome looking so it was worth it. We spent countless hours designing this thing and trying to avoid making the same errors as last year. We drew up our robot in AutoCAD for the technical parts, and 3DS Max to show everybody ideas and center of gravity was our biggest problem. We moved things around until it worked. The only problem we have now is that if you accelerate too fast without the ball, it will pop a fatal wheely but I plan to code a limit to how fast it can accelerate. Still working out the method of doing that though.

The worst problem we had (and that is pictured) is that parts of the frame were warped while our newer welder was welding it. The front wheels are 1/4" off the ground. That's fixed now though.

04-02-2008 00:30

MrForbes

Re: pic: Our New Robot Frame

That's a very common problem with welding structures, the welded area shrinks as it cools and warps the whole thing. Try welding auto body sheet metal some time if you want a real challenge

04-02-2008 00:32

Matt H.

Re: pic: Our New Robot Frame

well if you put encoders on the wheels you can determine velocity by using a timer function and dividing the number of encoder ticks by the time. You can determine acceleration by dividing that number by time again. (this is getting very nasty in terms of math)
Perhaps the easiest way is to use the kit enclosed gyro or an accelerometer.

04-02-2008 00:49

Aren_Hill

Re: pic: Our New Robot Frame

i love the powder coat, i don't like the COG at the moment but i'm pretty sure your battery and transmission are going down under that which will remedy that problem.

Our electrical guys would like that amount of accessibility lol

04-02-2008 00:54

comwiz7

Re: pic: Our New Robot Frame

The battery does remedy the problem. Plus the way the frame is set up, swapping the battery takes just a few seconds, as opposed to last year.

04-02-2008 10:02

team1203 4life

Re: pic: Our New Robot Frame

Quote:

Originally Posted by bloodknight2077 Nice robot design, but what if a ball lands on your electronics board?? :