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Unread 02-02-2012, 06:36 PM
de_ de_ is offline
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Who is using 10" or 8" Pneumatic Wheels

AM sells some (correction: sells 8" ones). You can buy them at hardware stores. They are used on dollies etc.

Just wondering how easy the robot is to turn ? Using them on a long robot or wide robot or smaller than legal footprint robot ? What about the bump ? Any testing with a full weight 145 lbs robot (including battery and bumpers or equivalent weights) ?

Last edited by de_ : 02-02-2012 at 09:28 PM.
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Unread 02-02-2012, 06:38 PM
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Re: Who is using 10" Pneumatic Wheels

You cannot buy 10inch wheels off AM as far as I know...

We got a set from SkyWayWheels, for pretty cheap with a FIRST discount.
Currently we are machining out hubs for them to be able to mount sprockets on, I will post back when we get a driving base with them set up.
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Unread 02-02-2012, 06:59 PM
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Re: Who is using 10" Pneumatic Wheels

Team 1247 is using 10 inch pneumatic wheels, though they are designed for wheel barrows. Half of them are even gold rimmed! In all seriousness, the robot is having a bit difficulty turning, and the voltage actually has to be ramped while turning because the breakers pop from the stall current :/
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Unread 02-02-2012, 07:02 PM
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Re: Who is using 10" Pneumatic Wheels

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Originally Posted by jp1247 View Post
Team 1247 is using 10 inch pneumatic wheels, though they are designed for wheel barrows. Half of them are even gold rimmed! In all seriousness, the robot is having a bit difficulty turning, and the voltage actually has to be ramped while turning because the breakers pop from the stall current :/
What kind of set up do you have? 4 Wheel? 6 Wheel? and how much drop if any?
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Unread 02-02-2012, 11:32 PM
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Re: Who is using 10" Pneumatic Wheels

Team 1339 is using wheels we got at harbor freight. They are heavy but may have some offsetting advantages. They sure do look cool. We have had little drive time so far as we had to machine hubs and blew out the crio. I'll keep you updated.

Last edited by mrnoble : 02-02-2012 at 11:42 PM.
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Unread 02-03-2012, 12:10 AM
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Re: Who is using 10" Pneumatic Wheels

We're using 7.5 inch wheels (they said 8 inch...) because the 10 inch wheels were too heavy. We put omni wheels on the back, and it obviously turns great. However, when we tried it with the standard rubber wheels, the chassis would just bow up and it wouldn't move at all when trying to turn.
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Unread 02-03-2012, 10:57 AM
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Re: Who is using 10" Pneumatic Wheels

We are using a 9" wheel from a supplier of scooter wheels and parts. They are about $40 each, come with the aluminum wheel, inner tube, tire, and a #25 pitch sprocket, and 10mm bearings installed. I'm a bit concerned with the turning. We are using a 6wd setup with a center drop.
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Unread 02-03-2012, 07:54 PM
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Re: Who is using 10" Pneumatic Wheels

If you have a 6 wheel chassis with 2 sets of omniwheels and 1 set of the pneumatic kind, turning isn't a problem at all.. our baby is drifting like vin diesel in an action movie. I'm not sure how an all pneumatic wheeled drive train would work out, however.
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Unread 02-03-2012, 08:36 PM
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Re: Who is using 10" Pneumatic Wheels

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Originally Posted by Mk.32 View Post
What kind of set up do you have? 4 Wheel? 6 Wheel? and how much drop if any?
We are using 4 wheels, and I'm not quite sure what you mean by "drop".
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Unread 02-03-2012, 08:39 PM
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Re: Who is using 10" Pneumatic Wheels

We are using eight 6" Pneumatic wheels.
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Unread 02-03-2012, 09:48 PM
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Re: Who is using 10" Pneumatic Wheels

Quote:
Originally Posted by mayde View Post
If you have a 6 wheel chassis with 2 sets of omniwheels and 1 set of the pneumatic kind, turning isn't a problem at all.. our baby is drifting like vin diesel in an action movie. I'm not sure how an all pneumatic wheeled drive train would work out, however.
For clarification, we're using the Andymark 8" Pneumatic wheels in the center of a six wheel drive, with 8" Dualie Omni Wheels on both the front and back (also from Andymark).

And, yeah, she spins like a top. So far we've only tested the 'bot on linoleum, and she tends to drift quite a bit, but that won't be as big of an issue on carpet. With some practice the drive team should be able to handle it fine.
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Unread 02-04-2012, 11:28 AM
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Re: Who is using 10" Pneumatic Wheels

We are trying a slightly different configuration this year; six wheels (10" with a 1/4" drop in the center), driving only the rear and middle. We have had success with using painter's tape to cover tread on the front wheels to avoid sticking in years past, and will probably do something like that again. We are doing a lot of testing today, so we'll see what happens.
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Unread 02-04-2012, 12:19 PM
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Re: Who is using 10" Pneumatic Wheels

We had 6 harbor freight wheels mounted and running and had no problem with turning with a 1/4" drop. We had planned on articulating the center wheels to allow for a stable shooting platform, but when we built the whole thing it turned out to be a little heavy.

We are now running two of our pneumatic wheels in the center and 2011 kop wheels front and rear. Looks like it should be about the same performance, but it doesn't look as mean. Plus it weighs 40 lbs less, which is good if we want to attach anything that can do minor tasks like perhaps picking up an 8" foam ball and shooting it.
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Unread 02-05-2012, 10:24 PM
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Re: Who is using 10" Pneumatic Wheels

we're using 10" pneumatics from harbor freight. They are our two front drive wheels and we have 2 casters on the back of the robot.

it turns pretty well, but that's all due to the casters.

If it was 4 pneumatics I can't say I know what would happen.

However, we had a team member sit on the robot and we noticed it drives much better under weight (the tires get more contact in the floor when pressed down).

I'd also suggest wearing them out a bit so the tread is flatter and, again, gets more contact with the floor.
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Unread 02-05-2012, 10:29 PM
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Re: Who is using 10" Pneumatic Wheels

We're using 8" pneumatic wheels, one in the center of each side of our frame. We'll be mounting casters on the front and back eventually, but just driving with the two wheels and nothing else, it handles great! We're flying right over the bump and climbing the bridge with no difficulty.
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