pic: Crevolution Teaser #2

[Squeakypig]

[cdm-description=photo]38496[/cdm-description]

[Botwoon]

Someone actually made a spherical robot? :eek:

[Mk.32]

Someone actually made a spherical robot? :eek:

I kinda doubt this... 3 550s in p60s as drive????
Or I guess all the CIMS are used for shooting/hanger but still....

[Andrew Schreiber]

[cdm-description=photo]38496[/cdm-description]

Lots of P60s and 550s for when those explode/cook?

[Kevin Sevcik]

I think that picture is near the top of my list for "World's least credible drivetrains". A three wheel killough already seems unlikely due to the complication, weird frame, and lack of pushing ability. Combine that with the idea of using easily toasted RS-550s in a stall-likely application, PLUS the incredibly popular* P60 gearboxes... Well. That would really be one of the all time worst drivetrains, really.

So what are the three P60s actually getting used for?

*Popular because you need to buy so many spare parts to keep them running through a season, of couse.

[Andrew Schreiber]

I think that picture is near the top of my list for "World's least credible drivetrains". A three wheel killough already seems unlikely due to the complication, weird frame, and lack of pushing ability. Combine that with the idea of using easily toasted RS-550s in a stall-likely application, PLUS the incredibly popular* P60 gearboxes... Well. That would really be one of the all time worst drivetrains, really.

So what are the three P60s actually getting used for?

*Popular because you need to buy so many spare parts to keep them running through a season, of couse.


http://www.youtube.com/watch?v=Ed7XDsZtkAM Err hmm... It's not THAT complex.

[JohnSchneider]

Does a shape with no corners need bumpers?

wait...how would you make them anyways?

[Kevin Sevcik]

Does a shape with no corners need bumpers?

wait...how would you make them anyways?There was an update (http://frc-manual.usfirst.org/Updates/0#term 42) covering a similar issue, namely the legality of frame perimeter segments <8" long. The reasoning was the the required 8" wraps around onto the adjacent segment, so short segments are legal as long as they're covered with a bumper.

I think applying that logic to a round frame would imply that you need the entire perimeter covered in bumper, as every point on the perimeter is a "corner".

Yes, it depends on how you define "corner". I'm assuming you define it as a change in direction of the perimeter. If you're insisting that it has to be a "sharp" step change in direction for it to count as a corner, then any robot could be bumperless by taking a belt sander and rounding the corners of their frame.

[JohnSchneider]

it was more of a joke. I guess the real question is how you bend the wood for that.

[EricH]

it was more of a joke. I guess the real question is how you bend the wood for that.

Wood tends to bend better if it's a bit damp. So, you steam up some plywood and bend away.

OK, maybe not quite so easy, but that's about how I'd do it.

[Dad1279]

it was more of a joke. I guess the real question is how you bend the wood for that.

http://packardforestproducts.com/products/plywood/hardwood-plywood/bending-plywood/#sthash.nLbw5ZoM.dpbs

[Jon Stratis]

I think applying that logic to a round frame would imply that you need the entire perimeter covered in bumper, as every point on the perimeter is a "corner".

Yes, it depends on how you define "corner". I'm assuming you define it as a change in direction of the perimeter. If you're insisting that it has to be a "sharp" step change in direction for it to count as a corner, then any robot could be bumperless by taking a belt sander and rounding the corners of their frame.

You are correct, according to the GDC response to Q203 on the Q&A:
In the example of a circular FRAME PERIMETER, the entire FRAME PERIMETER would require BUMPERS.

[capnslow]

That's an awesome drive, good luck :))

[karomata]

I wonder why you guys felt you needed to use a holonomic drive base, or how you would find it beneficial.

[Paul T.]

Maybe they are trying to get to the loader, as quick as they can (and make the base as light as they can) so they went with that (which i personally would stay away from) then they either shoot a ton into the goals and/or grab there colored Frisbees. then move to the pyramid and use there 6 CIMs to do a 30 point climb and the 20 pts for the frisbees into the goal the "50 point super move"

or its not there drive

or maybe there "punkin" us...

[Gregor]

There are only 2 wheels, and the gearboxes aren't even attached to the wheels. Can people not see this is a joke?

[Squeakypig]

http://www.dullneon.com/randomnotes/images-videos-and-other-content/2011/08/kiwi_bird_fruit.png

Switching out the motors, wheels are in the mail.

[Brandon Zalinsky]

I think you guys are selling this drivetrain short. RS550s are the CIMs of the future.

[Taylor]

It looks like it's the next logical iteration of this lovely design (http://www.chiefdelphi.com/forums/showpost.php?p=1005483&postcount=1). Hooray for innovation!

[Brandon Zalinsky]

It looks like it's the next logical iteration of this lovely design (http://www.chiefdelphi.com/forums/showpost.php?p=1005483&postcount=1). Hooray for innovation!

I think the debate big debate this year really shouldn't be linear or curved shooter, it should be kiwi drive or decagon wheels.

[Gregor]

I think the debate big debate this year really should be kiwi drive or decagon wheels.

Or both.