Re: pic: Whats going on HERE?
 

not so much torque, with the cims(going full on, out a toughbox) the wheels just spun and spun untill the forward momentum overtook the spinning and it went forward(about 4 seconds) we wanted to test soMething that we could just drive around and not have to worry about "easing it on" with the window motors theres' almost no slipping and nearly instant acceleration(yes we've done our math)

hmm, that exactly how we had our setup...ill make sure to test it again on monday to see whats wrong(seeing as so many peoples robots could turn) i wonder what could be causing our problems?

Re: pic: Whats going on HERE?
 

There's your problem right there. :cool:

Re: pic: Whats going on HERE?
 

i know, but in the heat of the game, i'd want to be able to have as much control as possible as quickly as possible


and about the math, I dont know, but its definately faster than 2.3 fps....(maybe we had a strong tailwind)


and if we find out this wont work, its not that hard to switch to tank drive.....

Re: pic: Whats going on HERE?
 

The thing is in the heat of the moment you'd just need to control your acceleration a bit. Make your acceleration progressive like go 25% then 50% then 100% throttle. Once you're moving a little bit you'll be less likely to spin wheels. And trust me, you'd rather spin wheels a bit and go 10fps than not and be limited to 4fps.

Re: pic: Whats going on HERE?
 

this could also be done in programming easily, if we decide to use a tank drive....we'd only have two cims(shouldent make any difference as the kickoff showed)


basically, we could do anything, its only the second week now....just prototyping i'd thought id share

Re: pic: Whats going on HERE?
 

Using a tank drive (skid steering) on a drivetrain built like a swerve seems to defeat the purpose, doesn't it?

:confused:

o wait nvm i think i interpreted that wrong.

And yup, sorry to sound like we're bashing your design, just giving criticism. After all, that is the point of posting prototypes on here.

Re: pic: Whats going on HERE?
 

Precisely, thats a good idea.... We're probably going to implement that as well. If you do a tank drive with a progressive acceleration then there's no need for a window powered swerve.

Re: pic: Whats going on HERE?
 

yeah, what ever desicions we make in the next week for our shooter/harvester design, will probobly cement our drivetrain to one or the other.....


we could,just make a swere work with the 2 cims and have only 2 modules in the front? wouldent be as easy to steer though

Re: pic: Whats going on HERE?
 

It might be a fun thing to try in the offseason, but if I were you I wouldn't risk spending that time and energy especially in the first 2 weeks of build. Some don't realize this, but loss of time doing something a bit odd can cost you a lot more than doing something crazy in like week 3 or 4.

If I understand correctly, you'd just want the front two to be turning? Why not just make something like ackerman ("car steering") then?

Re: pic: Whats going on HERE?
 

Stogi Speaks the truth here.

It's better to spend an extra day thinking before you start building and make the best decision possible than to commit to a risky design like this and loose a week when it doesn't work.

That being said it's not a bad concept it just might not work for this game. The window motors would put a severe handicap on your speed and may not be robust enough for a robot's drive train.

Re: pic: Whats going on HERE?
 

well that way there powered also, and we could just use two of what we have with some minor modification.....

and so far we've only spent two days on it, out of the week ....if you'all think its such a bad decision..its not that hard to just switch to something else...


as for time...its amazing what can be done in 4 hours when everybody is highly motavated and energized........

i remember last year, on the day before shipping, at 8:30 at night, we completely changed our drivebase from 4wd to 2wd with a castor and a unpowered wheel....


ps. this is what prototyping is for....