FRC488 - team xbot presents X8: The Ocho

[synth3tk]

What's the overall length of your robot? We apparently made our base too long to implement an arm correctly.

Otherwise, awesome job! Good luck at your competition.

[ladkahaidesi]

WHAT TIME IS IT?!?!?!?!?

[MasterChief 573]

Originally Posted by flamefixed

first off, i do hope great minds think alike! haha. heres why -

we are sporting a lift, leaning backwards to keep the mass of the ball central over the bot, cascade style belting, driven up AND down with two cims by an entirely fabricated gearbox and a combination of delrin and 8020 rollers and t slots. (though are entire "guillotine" we call it, is made from 8020 stock.

many similarities. puts my teams mind at ease about our design more


looks incredible. best of luck to you!

GIVE IT UP FOR DELRIN!!! Thats the material we used to build our cams that manipulate our fork while being lifted.

[Madison]

Originally Posted by blakcheez

What's the overall length of your robot? We apparently made our base too long to implement an arm correctly.

Otherwise, awesome job! Good luck at your competition.

The robot is about 78" long with the forks and inclinator in their lowest position.

Originally Posted by MasterChief 573

GIVE IT UP FOR DELRIN!!! Thats the material we used to build our cams that manipulate our fork while being lifted.

A significant percentage of our robot is plastic, with much of that being delrin.

• Our omniwheels are largely delrin, as are all three encoder mounts.
• Bearing blocks in the drivetrain are a mixture of delrin and polyethylene.
• Pulleys on the inclinator are each a combination of delrin, ABS and polycarbonate, while the winch drum is made from polycarbonate, delrin and polyethylene.
• Ball manipulator gussets are all polycarbonate, while it has polycarbonate ball stops and polyethylene skids.
• Electronics are mounted to ABS
• Dewalt XRP pinion is mounted to CIM shaft with delrin
• Spacers everywhere are delrin
• Linear slides on inclinator are polyethylene, rollers are nylon.
• Pneumatics are mounted polycarbonate, tubing take up reel is polycarbonate, ABS and delrin.
• IR board is delrin and acrylic.

...that's off the top of my head. There're probably many other things I'm forgetting. We love plastic.

[octothorpe]

Very nice robot – a truly elegant job on the paneling, and a design that's clearly very capable at the game. Sounds like a phenomenal sensor package too, I wish we had that kind of intelligence on our robot. My only qualm is at your mention of redundant cabling... because our elevator lacks it. Not that we had room for the extra weight anyway . Good luck and 766 will hope to see you at Championships!

[EricVicenti]

Originally Posted by M. Krass

The robot is about 78" long with the forks and inclinator in their lowest position.

Will that fit inside the 80" cylinder?

[Blue_Mist]

Originally Posted by ladkahaidesi

WHAT TIME IS IT?!?!?!?!?

488!!! Many fond memories at Silicon Valley last year, and hopefully we'll see you again in Atlanta!

Beautiful robot. I like the tipping back, which I haven't seen yet this year. I only have one item to point out. How are you on other robots knocking into Ocho, either tipwise or possibly knocking the ball out?

[Vikesrock]

Points from the last two posts appear to be clearly addressed in the robot stats that were posted

Originally Posted by M. Krass

# Remains upright until tipped to approximately 60* off horizontal in all directions -- with ball and elevator extended to maximum height.
# Physically incapable of violating <R16>

[Squirrel Lord]

You know what? I come home after school and start to scout for Portland. Now its a few hours later and I check Chief Delphi again to see if I can glean any more information for my report. And look, 488 gave me the best present of all: good information. Very good information actually!
Thanks a bunch!

[Madison]

Originally Posted by octothorpe

Very nice robot – a truly elegant job on the paneling, and a design that's clearly very capable at the game. Sounds like a phenomenal sensor package too, I wish we had that kind of intelligence on our robot. My only qualm is at your mention of redundant cabling... because our elevator lacks it. Not that we had room for the extra weight anyway . Good luck and 766 will hope to see you at Championships!

Thanks! We've never had so many sensors on a robot before; in fact, I am not sure if we've ever had sensors on a robot in the last three years. We knew early in the season that we could build mechanical systems to do everything we needed, but also that success this season was going to be largely based on good control systems. We've tried to do everything possible to give our programming team the feedback and access they've need to generate our software, and while I'm sure they might've liked a bit more time, they've done an amazing job.

Originally Posted by EricVicenti

Will that fit inside the 80" cylinder?

Yep!

Originally Posted by Blue_Mist

488!!! Many fond memories at Silicon Valley last year, and hopefully we'll see you again in Atlanta!

Beautiful robot. I like the tipping back, which I haven't seen yet this year. I only have one item to point out. How are you on other robots knocking into Ocho, either tipwise or possibly knocking the ball out?

Y'all were fantastic alliance partners and I wish we could make it down there again to make another run at a win.

The robot is pretty stout. The forks are, by design, expendable in some capacity -- and very easy to replace. We have two spares fabricated already with plans for three more.

It's pretty challenging to tip the robot. Our biggest fear is being clotheslined by the overpass while being illegally pushed from behind. While there's a penalty for that behavior, we have no expectation that faster robots will be well controlled.

The ball is pretty well corralled, also. We have some ability to vary the extent to which the forks tip the ball back against the robot, so if it turns out that we're dropping the ball frequently, we'll hold it tighter against our frame.

Originally Posted by Squirrel Lord

You know what? I come home after school and start to scout for Portland. Now its a few hours later and I check Chief Delphi again to see if I can glean any more information for my report. And look, 488 gave me the best present of all: good information. Very good information actually!
Thanks a bunch!

No problem! I can't wait to see your robot this season -- do y'all have any pictures?

We know how important it can be to have good information and, while there are some things about robot and strategy that we considered to be loosely "proprietary," we hope that by sharing as much information as possible, we'll encourage others to do the same. Ignorance doesn't typically benefit anyone.