VIDEO: team 1528 drive train experiment

[ttldomination]

This "concept" is actually one that is has taken on a lot of use in VEX Robotics. In fact, this year we had two teams run this concept, and teams 148/217 also used this in their nona drive.

Nice implementation. Probably one of the more efficient multi-directional systems. But once again, you're not going to be putting up much of a struggle when it comes to defense.

[PAR_WIG1350]

what exactly is nona-drive? I've heard a lot about it

[Andrew Remmers]

Originally Posted by PAR_WIG1350

what exactly is nona-drive? I've heard a lot about it

Nona-drive is a 9 wheeled robot 5 omni wheels 4 "treaded" wheels. There is an omni wheel in the center of the robot that runs perpendicular with the rest of the wheels, then at each of the corners there is a "pivoting system" that lifts the treaded wheels off the ground so the omni wheel in the center of the robot will then be able to drive the robot on its axis.

Thats my basic shake down about the concept.

Andrew

[CENTURION]

Originally Posted by Joyride_67_1902

Nona-drive is a 9 wheeled robot 5 omni wheels 4 "treaded" wheels. There is an omni wheel in the center of the robot that runs perpendicular with the rest of the wheels, then at each of the corners there is a "pivoting system" that lifts the treaded wheels off the ground so the omni wheel in the center of the robot will then be able to drive the robot on its axis.

Thats my basic shake down about the concept.

Andrew

Any idea where we could find some pics or something? I'm intrigued!
Tried some google searches, couldn't find anything though...

[Josh Fox]

Originally Posted by CENTURION

Any idea where we could find some pics or something? I'm intrigued!
Tried some google searches, couldn't find anything though...

This was the drive system that 148 and 217 developed and implemented this year.

You should check out this thread.

[RyanCahoon]

Originally Posted by CENTURION

Any idea where we could find some pics or something? I'm intrigued!
Tried some google searches, couldn't find anything though...

JVN also included some CAD renders of their (148's) robot in the build diary he made this year.

--Ryan

[Siri]

Originally Posted by MrFixIt2719

http://www.youtube.com/watch?v=q2VX6vitq5s

in the off season we experiment with different drive train and other ways to improve our robot for the off-season events so let me know what you think

Very well implemented, though I'd consider game-by-game whether you really need supershifters. Something lighter, depending on your ratio. We've put shifters on robots with omnis, but not often (or at least not wisely) and only after considering our exact strategy. You won't be pushing.

I'd also think hard about exactly how you--or rather, your drivers--want to control it. Consider it, design it, code, test it, and then test it again. And again... I've seen teams (ours included), regardless of programmer skill, have serious problems in this area with such agile drivetrains. Leave time for driver practice!

[Chris is me]

Originally Posted by Siri

I'd also think hard about exactly how you--or rather, your drivers--want to control it. Consider it, design it, code, test it, and then test it again. And again... I've seen teams (ours included), regardless of programmer skill, have serious problems in this area with such agile drivetrains. Leave time for driver practice!

While your point is still completely valid, I'd just like to add that one of the benefits of a slide drive is how easy it is to control with the most rudimentary of code. If I didn't know better, I'd make one myself! o.0

[MrFixIt2719]

Originally Posted by Siri

I'd also think hard about exactly how you--or rather, your drivers--want to control it. Consider it, design it, code, test it, and then test it again. And again... I've seen teams (ours included), regardless of programmer skill, have serious problems in this area with such agile drivetrains. Leave time for driver practice!

it was easy to control anyone who know how to play first person shooter games like halo or call of duty could drive it. the drive run off the same controls on an xbox 360 controller left joystick is forward, back, right, and left and the right joystick is spin left or right

[Chris is me]

Originally Posted by ttldomination

Nice implementation. Probably one of the more efficient multi-directional systems. But once again, you're not going to be putting up much of a struggle when it comes to defense.

Same can be said about mecanum drives, yet people seem to love putting those on their robots...

[kstl99]

Originally Posted by Chris is me

Same can be said about mecanum drives, yet people seem to love putting those on their robots...

The key advantage for us with the mecanum wheels was the speed and manuverability. I did not notice us being pushed around much but it could be that our drivers avoided the pushing matches. I did see that we were consistantly able to get to balls quicker than most and move them into the offensive zone or score.

[MrFixIt2719]

exactly why i put this drive train together i wanted a high manueverable robot and put the super shifters on there for some control in low gear with steering but still have the option to get where i need to in a hurry

[BJC]

Just out of curiosity, how do you have the controls set up? I've personally always disliked those funky Halo and Pacman type setups. Assuming a handheld controller I was sort of thinking along the lines of a standard tank drive for the 4 outer parellel wheels (for primary driving) and then using the L and R triggers to drive the 2 perpendicular wheels either Right or Left (for strafing). This way the robot is very easy to drive but still fully mobile in every direction using a combo of joysticks and L/R.

Anyways, really cool project, I personally prefer slide drives over mecanum wheels and this one looks very nice.

Edit: Answered above

[MrFixIt2719]

Originally Posted by BJC

Just out of curiosity, how do you have the controls set up? I've personally always disliked those funky Halo and Pacman type setups. Assuming a handheld controller I was sort of thinking along the lines of a standard tank drive for the 4 outer parellel wheels (for primary driving) and then using the L and R triggers to drive the 2 perpendicular wheels either Right or Left (for strafing). This way the robot is very easy to drive but still fully mobile in every direction using a combo of joysticks and L/R.

Anyways, really cool project, I personally prefer slide drives over mecanum wheels and this one looks very nice.

Edit: Answered above

we run our controls from a xbox 360 controller and run it like halo, i do like how you explain yours with using the triggers for the straffe options whiich would prolly be a little easier especially in controlling because i have notice with the way we drive it with the halo drive that sometimes when just trying to drive straight if the joystick is a slight to the left i straffe left a bit the triggers could cut that down but i run the halo drive cuz i have played halo and call of duty so much i am use to running it that way but like the idea of using the triggers now time to implement some way to get of pushing power


thanks for looking at it