NO. First, 600rpm on a 2" drive is too much, it is equal to 300 on 4". Why do u need those speeds on a small field but ur bot couldn’t even accelerate to its highest speed. Second, a mecanum drive requires more torque than a normal tank drive. Third, a lot of people said that 2" mecanum wheels suck, I haven’t tested it yet, so I m not commenting anything about that.
Maybe try 200 on 4", 257 on 4", 428 on 2" (If 2" are fine)
600 rpm on 2" wheels would actually be pretty ok for a light bot, not much faster than 280 on 4" which is perfectly acceptable. But as far as I’ve heard the 2" mecanum wheels are not a viable choice for a drive. something about the wheel rims digging into the tiles.
This information seems inaccurate. 200rpm X drive is slightly faster than 280rpm.
I use this all the time:
What chassis base should we use for our wheels
Nobody can answer this question for you, you need to figure it out for yourself!
VEX has a great resource for beginning teams to learn the design process and how to make decisions. Take a look here, and especially look at the “engineering” section to see how experienced teams have worked through making their design decisions: https://kb.roboticseducation.org/hc/en-us/articles/8373753632407-Students-Start-Here
and:
https://kb.roboticseducation.org/hc/en-us/articles/4460497609751-VRC-Engineering-Design-Process
what is GR in the table
I believe it is the gear ratio of the drive
Gear ratio
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We are going 400RPM 6M 3.25” 6 Wheels: two front and two back are Omni, 2 in the middle are the new tractions. Anyone have any thoughts on that? Feel free to share if you notice that this could have a major flaw.
We may have an intake PTO off of the drive to make it 4M drive. Would that cause the motors to burn out at 400RPM 4M?
That sounds viable
Im using 6M 450rpm on 2.75 wheels with the same PTO configuration and it works nicely
Drive speed is good for 6m, new tractions are good (they are very grippy).
4m drive for long periods of time might be too far of a stretch, depending on how light your robot is.
In this game, since you’re driving pretty much all the time, it’s more of an advantage if you could just dedicate 6m to the drive all the time.
The constant torque and acceleration boost when driving with 6m is worth it, imo.
Alright for sure, thank you
I personally don’t want the middle wheel (because tokyo drift vibes), but thats seems good, but thats just driver preference.
400rpm so good 
I can vouch for 6m 400 rpm 3.25". The speed is so good and the gearing is super convenient, very easily done without any idler gears at all.
It’s subjective of course, but this was by far my favorite drive speed out of all the ones I tried.
Yep, in this game I don’t see how anything less than a 6 motor drive will be competitive.
It’s definitely viable to use a 4m drive, but I figure the most efficient use of motors is to include them on the drive base rather than on subsystems.
Just because it’s not as efficient (using 4m drive) doesn’t mean it’s not competitive. Matter of fact, 4m drive won MoA !
The best thing about VRC is that it’s a long season. What work early may not work later in the season. Competitive teams don’t aim to beat last week’s best robots, they aim to beat next month’s best!
Heyy, I see you sound experienced when it comes to this. My team and I started last year. We had no experience at all, and this year we are expected to build a working robot that shoots disks, spins rollers, and expands. ( last year I was the programmer so I didn’t know much abt building and still don’t ) So far we have nothing. We don’t know how to build our drive train, the intake. I know what components out rib needs to have j just don’t what would be a good starting point. I’ve watched several videos but I’m still confused. Not sure about the different types of drive trains, but I do know the middle of the robot while be spacious so the in take could be there. Tips and advice is much appreciated and needed!!! Thank you
