Pit/Robot Carts?

[ChocolateDragon]

Talk wheels to me, forum.
I wanted to use pneumatic ones, but our overseer leader guy has concerns about their size and weight. So, now I am stuck into using KOP plaction wheels, and am told that this will not be much of a problem, as we will be mostly on carpet and linoleum. What about turning though? Standard tankish way? Should they swivel?


Attaching them as well, any suggestions for that?
Hehe, there I go thinking out type. But seriously, any help or input or anything would be greatly appreciated!

[roboticsgoof95]

Im sure there are pictures on their website, but i love the one that technical difficulties have. YOU CAN RIDE IT!

[EricH]

Originally Posted by ChocolateDragon

Talk wheels to me, forum.
I wanted to use pneumatic ones, but our overseer leader guy has concerns about their size and weight. So, now I am stuck into using KOP plaction wheels, and am told that this will not be much of a problem, as we will be mostly on carpet and linoleum. What about turning though? Standard tankish way? Should they swivel?

I don't know if your leader has been to a normal competition. For a cart, you can expect concrete or gym floors (depending on venue), not carpet (as only the field area and practice field can be expected to have carpet). You can also expect to go over at least one cable run via its ramped cover.

Again for a cart (you could be asking about either cart or robot--your post is kind of unclear), I would make one end swivel and one end not. Maneuvering is a tad easier that way.

If you're asking about robot, that's a whole 'nother ball game.

[giantmidget31]

Originally Posted by O'Sancheski

I don't know exactly how it works. I could ask some of my friends over on 175 for the exact details on it.

Attached is a pic of the lift.

I'm confused, how does this provide access to the bottom of the robot?

[Nicole175]

Originally Posted by giantmidget31

I'm confused, how does this provide access to the bottom of the robot?

A scissor lift allows the robot to be lifted to a height where the bottom of the robot is easily accessible. The cart holds the robot up by its frame so wheels/chains can be changed easily.

[ChocolateDragon]

Originally Posted by EricH

I don't know if your leader has been to a normal competition. For a cart, you can expect concrete or gym floors (depending on venue), not carpet (as only the field area and practice field can be expected to have carpet). You can also expect to go over at least one cable run via its ramped cover.

Oh he has, it was just a general statement, sorry for the confusion. :L My concern comes from the jostling that may occur when going over those cables with said plaction wheels. (these things: http://i606.photobucket.com/albums/t...icture0077.jpg )

Originally Posted by EricH

Again for a cart (you could be asking about either cart or robot--your post is kind of unclear), I would make one end swivel and one end not. Maneuvering is a tad easier that way.

I'm asking about cart wheels, sorry if that wasn't clear. ^^; So....swivel, as in chair wheels sort of?

Originally Posted by EricH

If you're asking about robot, that's a whole 'nother ball game.

I am not :L

[giantmidget31]

Originally Posted by Nicole175

A scissor lift allows the robot to be lifted to a height where the bottom of the robot is easily accessible. The cart holds the robot up by its frame so wheels/chains can be changed easily.

It looks to me like there's a platform under the robot. Am i just not looking at the picture correctly?

[commonsense]

Our team has a cart with a main box base. On top of that is a 4 jack system. The jacks can slide left to right and forwards and backwards. This allows for any size frame in the normal frame requirements. The jacks have U-brackets on them that fit around our frame. They fit snug enough that when we lock down the jacks the cart can tip several degrees without any slip.

[V_Chip]

Originally Posted by giantmidget31

It looks to me like there's a platform under the robot. Am i just not looking at the picture correctly?

No, you are not incorrect. There is a platform under the robot.

[giantmidget31]

Originally Posted by V_Chip

No, you are not incorrect. There is a platform under the robot.

So then how would lifting it up provide access to the bottom of the robot if there is still a full platform under it??

[V_Chip]

Originally Posted by giantmidget31

So then how would lifting it up provide access to the bottom of the robot if there is still a full platform under it??

The robot is elevated off of the platform by pegs that secure it by the frame. This supplies a generous amount of space to reach all our drive components.

Using the lift also allows for easier access.

Please refer to O'Sancheski's post on the first page of this thread. It shows a picture of the lift elevated up.

[BrendanB]

Best robot cart ever hands down once you take off the side gates. While it doesn't have storage (a few mods will give you a second shelf) it is great for easily maneuvering around a venue and over uneven ground. When my old team went to a regional a few years back we rolled in with one similar to this and got such positive feedback from a few teams later that day a few were getting taken out of boxes fresh from Home Depot.

http://www.homedepot.com/Outdoors-Ga...atalogId=10053

[ChocolateDragon]

Hey, can anyone help me with an 80/20 problem? I'm not sure how to connect them to each other (or other metal, for that matter) perpendicularly.

Eg: Piece A = --------- and Piece B = |
(~~~~~~~~~~~~~~~~~~~~~~))|
((~~~~~~~~~~~~~~~~~~~~~)))|

If A is one of those 2.5 cm square tube pieces, and B is a piece of 80/20, how would that work?

[jon-s]

Originally Posted by Nicole175

A scissor lift allows the robot to be lifted to a height where the bottom of the robot is easily accessible. The cart holds the robot up by its frame so wheels/chains can be changed easily.

The scissor jack would need to be braced though, because it has very little rigidity. The motor pushing the scissor jack would need to be fairly strong (more than strong enough to lift 120+lb with very bad leverage).

[jon-s]

For a "cart", our team used to use a handcart, but the robot had to be turned sideways to fit (with bumpers). Now we use a something else: a sheet of wood,something like 1x2 ft, with a caster in each corner). The new cart is mucheasier to use and will work with most robots with a flat bottom. The four casters make the cart much more manueverable. The robot sits much lower on the new one too.