pic: 25's drive module

[Billfred]

[cdm-description=photo]28717[/cdm-description]

[CraigHickman]

I keep ogling this drive system, and have been really wondering how the internals work on this thing. Is there any chance I could get my grubby little paws on the CAD for this thing? I have and use both Inventor and Solidworks. I'd love to see inside the design of a team that I've looked up to.

[Bharat Nain]

The Behind the Design book has a CAD drawing of our drive system. If you search this forum, you will find a lot of information on how it works. If you have anymore questions though, feel free to ask here or contact me.

[Freddy Schurr]

What wheels does your team use?

[Bharat Nain]

What wheels does your team use?
Skyway Bead lok. The ones in this picture are shown as you buy them. We usually sand ours down and custom cut them to match our game play strategy.

[CraigHickman]

Any idea how much that module (as pictured) weighed?

I'm now working with Inventor to try and recreate this, so I can get a better picture on what it would work like with gears, as I've always used chain.

[AdamHeard]

Any idea how much that module (as pictured) weighed?

I'm now working with Inventor to try and recreate this, so I can get a better picture on what it would work like with gears, as I've always used chain.

I can't recall exactly, but I felt it at champs and bharat told me a number I've long since forgotten. It wasn't that bad compared to how nice a system it is though.

[Travis Schuh]

Nice, I like the large gears. Where do you find such large gears and how much do they cost?

Thanks, Travis

[Bharat Nain]

Any idea how much that module (as pictured) weighed?

I'm now working with Inventor to try and recreate this, so I can get a better picture on what it would work like with gears, as I've always used chain.

I'd estimate about 25lbs.

Nice, I like the large gears. Where do you find such large gears and how much do they cost?

Thanks, Travis

You can get them at Boston Gear and McMaster.

[Travis Schuh]

Am I seeing bronze gears (the golden color ones)? Why would you choose these gears over steel gears.

Thanks, Travis

[Morgan Gillespie]

For some reason I cannot delete this post
Mine no longer matters as Bharats fills you all in, my post has been spoiled.
The module you see weighs around 27 - 28 pounds.
The gears used in our bot were purchased from both Browning and Boston Gear.
Browning (http://rollway-bearing.be/eptroot/public/prod/dynamic_frame.asp?strMain=http%3A//rollway-bearing.be/EPTroot/Public/prod/BrgOpenGr/BrgOpenGr.htm)
Boston Gear (http://www.bostongear.com/)

Gears mounted on the Skyway Bead-LOK Wheels (http://www.skywaywheels.com/products_002.htm) were purchased from Browning then reamed, drilled, and cut to our needs.
Idler gears between the wheels where purchased from Boston Gear and were simply mounted onto axles.

[Wayne C.]

Am I seeing bronze gears (the golden color ones)? Why would you choose these gears over steel gears.

Thanks, Travis

the brass gears are a little softer and hold their teeth better than steel when they go against each other

[Wayne C.]

[cdm-description=photo]28717[/cdm-description]

curious- who requested? anybody can come out to BE 6 on November 3 and play with the gearbox if you want

WC :cool:

[Kristian Calhoun]

curious- who requested? anybody can come out to BE 6 on November 3 and play with the gearbox if you want

WC :cool:
These pictures spawned from a request by an alumni of Team 118, The Robonauts, in this thread (http://www.chiefdelphi.com/forums/showthread.php?t=57796). :cool:

[Joe G.]

Could someone please elaborate on how the servo braking system works?

Thanks

[Bharat Nain]

Could someone please elaborate on how the servo braking system works?

Thanks

We drill holes into gears and custom make a pin to fit into it. The servo simply puts the pin in, locking the entire drive system since all gears are connected.

[Billfred]

curious- who requested? anybody can come out to BE 6 on November 3 and play with the gearbox if you want

WC :cool:

These pictures spawned from a request by an alumni of Team 118, The Robonauts, in this thread (http://www.chiefdelphi.com/forums/showthread.php?t=57796). :cool:
Just no bringing out the Cool Squad (http://www.chiefdelphi.com/media/photos/18485) because he asked. (Or because I posted--there's still an hit out on me from 2005! ;))

[Brandon Holley]

We drill holes into gears and custom make a pin to fit into it. The servo simply puts the pin in, locking the entire drive system since all gears are connected.

to elaborate on your own design bharat...

they use a spring to push the pin into the gear...this way, there is minimal side load on the gear when it is not exactly lined up and they are trying to engage their brakes. simple design, but very effective.