19-01-2011 06:34

Guilherme R.

Re: pic: What about this???

3/8" would be awesome, it should stand a big hit, shouldn't it ?

19-01-2011 07:16

bruno1308

Re: pic: What about this???

This is really good! That's an amazing drawing. The size of the plates maybe 3/8", you are right Guilherme. Good luck, see you at the competition!

19-01-2011 07:20

Igor1201

Re: pic: What about this???

I don't think so, I think the better is 1/2" of size, this may be perfect. But this a amazing job! good luck to u all

19-01-2011 07:24

sgreco

Re: pic: What about this???

My team did 1/4" last year and it was overkill. 3/8" is even more than you need. If you get some cross supports between the side plates and support it from the inside then you could go with 1/8 inch. Make sure to cut out some of the weight in structurally insignificant points in the metal, otherwise this could be very heavy and take away from other subsystems of the robot.

19-01-2011 09:00

Brandon Holley

Re: pic: What about this???

I'm glad to see you are all proud of your own team's work....


1/4" plate will be plenty. I would start worrying about weight in its current configuration. Keep up the good work.

-Brando

19-01-2011 09:02

Thermal

Re: pic: What about this???

1/4" should be the absolute max thickness of your sideplates, and thats way overkill. With proper breaking theres no reason you can't go a 10 or 11 gauge aluminum.

19-01-2011 12:05

MrForbes

Re: pic: What about this???

What material are you making it from? If it is aluminum, then 1/8" would be good. If it is plywood, then 1/2" or 3/4" would be good.

Think about how heavy the robot will be, include ALL the parts.

19-01-2011 12:20

Chris is me

Re: pic: What about this???

I would step down to 1/8" (except for the L brackets) and then use plenty of standoffs to make a more rigid robot. Make the drive axles double as standoffs, put some in between the wheels... just add some and you'll have a lot less problems. Don't forget cross bracing between the two sides.

I would see if you could make your chassis shorter. Why all that height? That's just more material and more weight.

Are you able to cold roll flanges into sheet metal (do you have a brake)? If so, they will dramatically improve your resistance to bending.

19-01-2011 14:23

Nazir Laureano

Re: pic: What about this???

Our is made of alluminium, but I don't know the size of this. Please, Help us!!!
Is better we stop of this plan and start other one??? And what about the weight of this

19-01-2011 14:27

Nazir Laureano

Re: pic: What about this???

Our is made of alluminium, but I don't know the size of this. Please, Help us!!!
Is better we stop of this plan and start other one??? And what about the weight of this???
And about the height, we are using all this height because it is more easy to the project of minibot and the arm for the game pieces.

19-01-2011 15:43

Brandon Holley

Re: pic: What about this???

By the looks of it, it appears you are using 1/4" aluminum plate (I may be wrong).

With the height of the drive base, the amount of plates, and lack of pocketing to save weight, this will be a very heavy drive base. You can fix this by making the drive base shorter, switching to a thinner wall aluminum plate and adding standoffs, or pocketing the drive plates so they weigh less.

I would talk with your team about weight budgets, and try to give yourselves a weight estimate for each subsystem and see if your current configuration will fit into the drivebase's weight allotment.

Also as a sidenote, this is in CAD so you should be able to get a weight estimate right in the CAD software to let you know approximately how heavy it will be.

Good luck, feel free to ask any other questions you may have, I'm sure many others can help as well.

-Brando