Re: pic: 25 Base Bot Climbs 1089
 

heh...we took a page out of your books and tried the 6 wheel drive again...i dont think we used any of the plans, we just tried our own 6 wheel after seeing and running with you guys for the past few years....after winning NJ last year, we realized that those caster had to go! with that said, i know 25 has been a big help to other teams and their drivetrains, but 103 is also available for questions...check us out in galileo!

Re: pic: 25 Base Bot Climbs 1089
 

6wd isn't a problem for team 1345. I just would like to know how to turn on dime without lowering your middle wheel. Thank you for your offer and I will definitely like to look into the chassis you guys designed this year. =)

Re: pic: 25 Base Bot Climbs 1089
 

What about a slightly (just slightly) larger center wheel? That would slightly lower the center (less than a lower hole), but could be compensated for. Then again, you would run into issues with the wheels running different speeds. (Easily solvable, but not pretty if not solved.)

Re: pic: 25 Base Bot Climbs 1089
 

You are right, but I was told that team 25 never lower their middle wheel when they design a 6wd. I would like to know how...

Re: pic: 25 Base Bot Climbs 1089
 

A lot of thought go into our machines. The simple answer to why we can do that is 'Brute Force'. But I am sure you do not want to hear that. We pay close attention to detail - the materials we use for gears and the alignment/construction of the drive train. We do all this simply to ensure peak performance or in engineering terms - efficiency. Another thing we do is make the drive train as modular as possible. Therefore, if we do make a mistake, we have a chance to correct ourselves during the season without any major re-designs.

Re: pic: 25 Base Bot Climbs 1089
 

I know this has been asked and answered before, but what is the benefit to this?

If I remember right, it causes you to bounce while turning (atleast it did last year)... Isn't that hard to control?

I know you have good reasons for it, enlighten us.

Re: pic: 25 Base Bot Climbs 1089
 

Haha, the famous (or infamous) "brute force."

Psssst, people......guess what....it works. ;)

Re: pic: 25 Base Bot Climbs 1089
 

Depending on the game, or event, we configure our robots to suit our needs. This year, our outer wheels were cut slightly smaller than our inner wheels so we could turn easy. Last year, it was not that easy to push us around which allowed us to shoot the balls in the goal when needed.

Re: pic: 25 Base Bot Climbs 1089
 

So, since it takes x amount more force to turn, It's that much harder for other teams to turn you?

That makes a great deal of sense actually. Taking a problem that has plagued inexperienced teams and using it (with precise calculations I'm guessing) to your advantage.

Re: pic: 25 Base Bot Climbs 1089
 

Absolutely. Having great precision allows maximum efficiency output from the time the current is applied through the circuit box to the time the wheels hit the floor. But as Bharat said, modularity is also key.

If you get a chance, stop by our pits in Galileo and see, but our entire motor setup is rather flexible. With multiple input shafts on each side, we can shift the motor plates to any of multiple locations depending on where we want the weight and placement to be. This year with our mast in the front it was beneficial to have more weight towards the back and so our mounting is reflective of that. Each of the plates has a spot for the servo brakes and only one brake needs to be inserted per side to effectively lock down the entire drive train.

Because our transmissions are modular as well, and rather small in size, it allows for easy changes in gearing depending on what the game calls for--they simply "pop in and out".

Finally, from the time we first started using gear driven drive trains we've learned from our mistakes and improved on future bases. Each year its modified as we see fit, but the underlying principles for each remain the same--simplicity, simplicity, simplicity.