How are you Driving?

West Coast Drive is best coast drive.

[Electronica1]

We will be running our Legendairy Octocanum drive, now with 35 chain.

[pfreivald]

Originally Posted by Electronica1

We will be running our Legendairy Octocanum drive, now with 35 chain.

Why not belts?

We're using belts, VEXPro mecanum wheels, and 2" Colsons with tread cut into them.

[mrnoble]

East Coast. Tried and true.

[yash101]

Originally Posted by mrnoble

East Coast. Tried and true.

Darn it...I'm on the west coast

We are using Mecanum DT this year. It will be a similar drivetrain as last year, but with many tweaks, performance impovements and better code. We might switch wheels too, though we haven't really decided yet. The AM wheels held up better than we expected, and only required some graphite-lube, once in a while!

[Anupam Goli]

We're doing a nonstandard 6 wheel drive. Some adjustments had to be made to the standard 6WD setup in order for our CG and weight distribution to not have adverse effects on our ability to turn and maneuver.

[Bryce2471]

We are exited to by going with a swerve drive. I'm confident that it is the best drive train for the job. That is reinforced by the relatively large percentage of swerves in the poll so far.

[Austin2046]

It seems a clear majority are going with the standard 6/8 wheel tank, as is our team. What about other specs? Wheel size? type of wheels? two speed/single speed transmission? 6 cims? 4 cims? what will your floor speed be?

[Brian C]

Originally Posted by yash101

Darn it...I'm on the west coast

Technically you're a LONG way from any coast

[blaze8902]

What is the reasoning behind trying to make your drive-train as light as possible? Is it simply to save weight-space for manipulators?

[Jared Russell]

Originally Posted by blaze8902

What is the reasoning behind trying to make your drive-train as light as possible? Is it simply to save weight-space for manipulators?

Adding weight is a lot easier and less stressful than removing weight.

[Ryan Dognaux]

We're using an all gear 10WD using the 4" VexPro DT wheels powered by the Vex 3 CIM ball shifters - Link

[cadandcookies]

6WD with 4" VexPro DT wheels, belts, and a single speed gearbox. We tried to keep our drive train as simple and robust as possible while still giving students working on the drive train a good amount of experience designing custom parts.

Unfortunately, our plans to get drive bases up as quickly as possible have fallen a little bit out of whack due to VexPro delays and some problems with machining. Luckily we're still about twice as far as we were at this point last year.

[Electronica1]

Originally Posted by pfreivald

Why not belts?

We're using belts, VEXPro mecanum wheels, and 2" Colsons with tread cut into them.

The way our octocanum system works, 3 inch Colsons are held in their own modules to make the modules as small as possible (and in turn lighter). When we shift, the sprocket on the mecanum wheel and the sprocket on the colson wheels get a 1/8 of an inch closer together. We use chain because the teeth are larger on a sprocket than on a pulley. In the end we only add less than 5 lbs to a normal mecanum system which sounds like a decent trade off, especially when all you have to do to switch to normal mecanum (because plan B is a great thing to have) is just unbolt the modules.

Our very early prototype

[pfreivald]

Originally Posted by Electronica1

The way our octocanum system works, 3 inch Colsons are held in their own modules to make the modules as small as possible (and in turn lighter). When we shift, the sprocket on the mecanum wheel and the sprocket on the colson wheels get a 1/8 of an inch closer together. We use chain because the teeth are larger on a sprocket than on a pulley. In the end we only add less than 5 lbs to a normal mecanum system which sounds like a decent trade off, especially when all you have to do to switch to normal mecanum (because plan B is a great thing to have) is just unbolt the modules.

Our very early prototype

Cool! We use 2" Colsons to make the drivetrain as light as possible, but both wheels and the linkage are contained in a single pod. The first 5-ish seconds of this shows a prototype of our original system with 4" roughtop wheels. It's now a lot smaller, a lot more compact (doesn't come above the frame), uses smaller pistons to shift drive modes, and has even better traction on smooth surfaces without sacrificing carpet traction.

If we have the weight, we're likely going to add four mini-CIMs to the drivetrain--but we have to hold off on that until we're sure we can swing it.