03-01-2015 21:42

who716

Re: pic: 2015 WCD Clearance Considerations

just to verify what is this exactly depicting a robot driving over the humps.

03-01-2015 21:44

Chris is me

Re: pic: 2015 WCD Clearance Considerations

Seems like 6" wheels and 2" tube are pretty much gonna handle anything the bump can throw at it, which is nice.

03-01-2015 21:44

RockerRobot

Re: pic: 2015 WCD Clearance Considerations

I think the point is to Not drive over the scoring platforms. Thats why maneuverability is key this year.

03-01-2015 21:47

Boe

Re: pic: 2015 WCD Clearance Considerations

If I want to go get something from the landfill zone from a feeder station why drive around the scoring platforms in some crazy "S" instead of driving strait over them.

03-01-2015 21:47

Jacob Bendicksen

Re: pic: 2015 WCD Clearance Considerations

It's nice to be able to dance around the platforms, sure, but the area in between them is going to get pretty congested with totes and other robots. Being able to drive over the platforms should make things more efficient for you.

Also, they put ramps on them, so they clearly thought that teams would want to drive over them.

03-01-2015 21:48

rutzman

Re: pic: 2015 WCD Clearance Considerations

Why do you think that?

03-01-2015 22:14

JesseK

Re: pic: 2015 WCD Clearance Considerations

Apologies, I mis-clicked prior to finishing the description. This is a skid-steer robot represented from the front, as if the robot were driving down the white raised platform. The line going between the 1.5x6" wheels represent the bottom of the cross rails of a WCD (not including bellypan/etc).

03-01-2015 22:17

who716

Re: pic: 2015 WCD Clearance Considerations

depend on your situation obviously if you have totes stacked on the platform driving over it is out of the question unless you want to void the points for that. but if there are no totes yet by all means save the time and drive over the platform, if you want you could even keep an open path on one to ensure safe travels but remember its plastic wich could make things difficult

03-01-2015 22:45

Lil' Lavery

Re: pic: 2015 WCD Clearance Considerations

e: nvm. please delete

03-01-2015 22:48

JesseK

Re: pic: 2015 WCD Clearance Considerations

Double-check that you're comfortable with this 0.25" clearance:

03-01-2015 23:46

BJT

Re: pic: 2015 WCD Clearance Considerations

.25 is plenty, but mine will have a wheel or 2 between those two, so no problem. pretty sure 4" wheels would work fine too

04-01-2015 08:13

JesseK

Re: pic: 2015 WCD Clearance Considerations

in the first picture, those are 6" wheels which do not bottom out. 4" wheels definitely bottom out.

04-01-2015 18:25

quantcyg

Re: pic: 2015 WCD Clearance Considerations

Depending on the length of your base, you actually can get away with 4" wheels traveling over the platforms. However, with a WCD, you'll need 6" wheels in case you catch the corner of the scoring platform with the front of the drivebase or if you want to drive along the length of the platform.

In short, going with 6" wheels is probably the better option.

04-01-2015 18:25

TylerS

Re: pic: 2015 WCD Clearance Considerations

Can someone just verify that 1in is enough clearance to not have to worry about the bump?

04-01-2015 18:27

Gregor

Re: pic: 2015 WCD Clearance Considerations

I don't think catching on the edge of the incline is a deal breaker. While not the most elegant solution, HDPE is very slick plastic and your back wheels would still be touching the ground.

There's also no defined frame perimeter this year, so you can do interesting things with that.

05-01-2015 08:09

Jay Burnett

Re: pic: 2015 WCD Clearance Considerations

But if you go with an 8 wheel 4" drive, you could easily make sure that you don't bottom out between wheels. That's assuming you don't go for a super long wheelbase.

05-01-2015 08:28

Lil' Lavery

Re: pic: 2015 WCD Clearance Considerations

To clarify, it's the trackwidth that's the challenge, not the wheelbase. As mentioned, adding additional wheels easily solves the challenges with the wheelbase when you're travelling perpendicular to the scoring platform. However, if you're travelling down the length of the platform (or at more extreme angles towards the platform), the width between your wheels may cause your robot to bottom out if you don't have enough ground clearance.

05-01-2015 09:00

Jay Burnett

Re: pic: 2015 WCD Clearance Considerations

oh right. Got it