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-   -   pic: 25's drive module (http://www.chiefdelphi.com/forums/showthread.php?t=57799)

Billfred 04-06-2007 21:32

pic: 25's drive module
 

CraigHickman 04-06-2007 21:34

Re: pic: 25's drive module
 
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 04-06-2007 22:04

Re: pic: 25's drive module
 
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 04-06-2007 22:35

Re: pic: 25's drive module
 
What wheels does your team use?

Bharat Nain 04-06-2007 22:44

Re: pic: 25's drive module
 
Quote:

Originally Posted by Freddy Schurr (Post 630501)
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 04-06-2007 23:48

Re: pic: 25's drive module
 
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 05-06-2007 00:12

Re: pic: 25's drive module
 
Quote:

Originally Posted by 114ManualLabor (Post 630506)
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 05-06-2007 00:13

Re: pic: 25's drive module
 
Nice, I like the large gears. Where do you find such large gears and how much do they cost?

Thanks, Travis

Bharat Nain 05-06-2007 00:41

Re: pic: 25's drive module
 
Quote:

Originally Posted by 114ManualLabor (Post 630506)
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.

Quote:

Originally Posted by Travis Schuh (Post 630509)
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 05-06-2007 00:49

Re: pic: 25's drive module
 
Am I seeing bronze gears (the golden color ones)? Why would you choose these gears over steel gears.

Thanks, Travis

Morgan Gillespie 05-06-2007 00:50

Re: pic: 25's drive module
 
For some reason I cannot delete this post
Mine no longer matters as Bharats fills you all in, my post has been spoiled.
Spoiler for Beat me to it:
The module you see weighs around 27 - 28 pounds.
The gears used in our bot were purchased from both Browning and Boston Gear.
Browning
Boston Gear

Gears mounted on the Skyway Bead-LOK Wheels 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. 05-06-2007 16:35

Re: pic: 25's drive module
 
Quote:

Originally Posted by Travis Schuh (Post 630512)
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. 05-06-2007 16:37

Re: pic: 25's drive module
 
Quote:

Originally Posted by Billfred (Post 630490)

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 05-06-2007 16:41

Re: pic: 25's drive module
 
Quote:

Originally Posted by Wayne C. (Post 630574)
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. :cool:

Joe G. 05-06-2007 16:54

Re: pic: 25's drive module
 
Could someone please elaborate on how the servo braking system works?

Thanks

Bharat Nain 05-06-2007 18:44

Re: pic: 25's drive module
 
Quote:

Originally Posted by rocketperson44 (Post 630578)
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 06-06-2007 09:47

Re: pic: 25's drive module
 
Quote:

Originally Posted by Wayne C. (Post 630574)
curious- who requested? anybody can come out to BE 6 on November 3 and play with the gearbox if you want

WC :cool:

Quote:

Originally Posted by Kristian Calhoun (Post 630576)
These pictures spawned from a request by an alumni of Team 118, The Robonauts, in this thread. :cool:

Just no bringing out the Cool Squad because he asked. (Or because I posted--there's still an hit out on me from 2005! ;))

Brandon Holley 06-06-2007 10:35

Re: pic: 25's drive module
 
Quote:

Originally Posted by Bharat Nain (Post 630590)
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.


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