Re: 935 as of last night
 

Coolest feature of this robot? The built-in lifting handles at the top corners of the side plates!

What are your gear reductions from the CIM to the wheel? The gear meshing with the CIM output looks huge? I'm guessing it's somewhere around an 80 tooth?

Looks very nice. As always, I'd love to see some video.

BEN

Re: 935 as of last night
 

Re: 935 as of last night
 

That. Is. Crazy. I definitely want to see how this fairs in next year's competition.

Re: 935 as of last night
 

Yes, it looks much better :D

Re: 935 as of last night
 

That is an amazing looking piece. Nice to see some quality craftsmanship. One question the front plates are attached to the side by 12 allen bolts. Are these just threaded into tapped holes on the side plates and if so how large are the holes and how solid is the frame since it is a narrow material being held by small bolts.
Did you make the wheels yourself or did you buy them?

Very nice work. i wish my team had a waterjet (if thats what you used)

Re: 935 as of last night
 

so i guess the rule regarding building the robot only during the 6 week period after kickoff was just a suggestion? interesting

looks nice tho

Re: 935 as of last night
 

The rule covers building the competition robot. This is prototyping, which can happen at any time.

Re: 935 as of last night
 

We used a CNC machine, not waterjet and we bought our wheels from andymark.

Re: 935 as of last night
 

Do you have any kind of suspension system for the modules (it doesn't look like it, but I may just be missing it). Many teams have had problems with vector-based drivetrains (such as mecanums) when one or more wheels loses contact with the ground. The typical solution is some sort of suspension. Check out what team 40 and 357 did with their bots in 2006, and what 488 is doing with their prototype for examples.

Re: 935 as of last night
 

As of right now we don't have any kind of suspension. We may play around with that idea, though.

Re: 935 as of last night
 

Awsome machining.

Congrats to 935 on that robot it looks amazing.

On the front and back plate, what thickness is it?

Re: 935 as of last night
 

just curious, since the rollers are not curved, does it vibrate a bit when driving on a smooth surface? seems the wheels would be a bit "lumpy"

Re: 935 as of last night
 

What is the traction like with the AndyMark's? From what I have heard the wheel can make alot of difference in how easy the drive is to defend against(ie push around)

Also it doesn't look like it is going to float to well and all those holes are going to be tough to water proof for the game this year.

Rally though, it looks great hopefully the game this year will be one where you can make good use of this drive system.

Re: 935 as of last night
 

The robot does vibrate quite a bit on a smooth surface and there is less vibration on carbet. As for traction we were able to push our mentor around while he was sitting a stool on polished concret.

Re: 935 as of last night
 

(smirks) Mecanum (smirks) OH well I suppose it's one of the better looking chassis with these wheels I have seen. Hopefully for you guys this years game requires mobility and doesn't have stairs :rolleyes:. The good news is you have now till ship if you do use that chassis to figure out the programming because if you want any descent driver controls and a good autonomous mode it will take till ship to get it right. Other then that I have a few questions how much does it weigh as shown, what made you want to prototype this kind of drive system and with all the machining access your team obviously has why not make your own Mecanum wheels other then for the sake of saving time because we all know you've been working on this for a while and probably had the time in the off season. I can't wait to see these systems at competition, good luck to 935.