24-02-2008 19:29

Dominicano0519

Re: pic: Big Bad Bob

does it do any tricks

you know flip/roll over

24-02-2008 20:15

Ty Tremblay

Re: pic: Big Bad Bob

We designed it so it has no designated front. So the arm can be on any side of the robot and our programming designates that as the front.

24-02-2008 20:29

Scott Carpman

Re: pic: Big Bad Bob

Can it right itself after being knocked over?

24-02-2008 20:41

lukevanoort

Re: pic: Big Bad Bob

I thought that arm looked kind of familiar. Anyway, nice bot guys, hows the CoG on it?

24-02-2008 20:43

Ty Tremblay

Re: pic: Big Bad Bob

Yes.

24-02-2008 20:44

Ty Tremblay

Re: pic: Big Bad Bob

Well, lets put it this way. We were going to put an active counterbalance on it. But deemed in unnecessary as the robot won't tip anyways.

25-02-2008 09:05

Peter Matteson

Re: pic: Big Bad Bob

[quote]Pneumatic Gripper (70" wide when fully open)[quote]

How does that stay within the 80 inch rule? I'm just assuming if you arm is away from your base, when you pickup the ball the diagonal across you robot's outer edges is really going to come close. I would guess any violation would come as the arm swings through to close, not while in a static open or close position.

I'm only asking because of our own design issues. Our arm doesn't open near that wide and that was the constraint to us on how wide we could let it go. (Outer edge of claw to rear of opposite side bumper diagonal was the longest dim we had)

25-02-2008 09:33

dbell

Re: pic: Big Bad Bob

If i were you i wouldn't count on it. After seeing your robot at the BAE systems unveiling, I personally think your robot will tip over sometimes. But the self righting arm will help a lot. Still, nice robot! Good luck at the BAE Granite State Regional.

25-02-2008 11:31

Ty Tremblay

Re: pic: Big Bad Bob

[quote=Peter Matteson;706842][quote]Pneumatic Gripper (70" wide when fully open)

The arm also has a wrist join on it. When we have the ball (which is the only time the robot can break the 80 inch rule) we tuck the wrist in before lifting the arm.

25-02-2008 14:17

afi419

Re: pic: Big Bad Bob

How stable is it when carrying a ball.

25-02-2008 15:57

Ty Tremblay

Re: pic: Big Bad Bob

Very

25-02-2008 16:53

afi419

Re: pic: Big Bad Bob

Have you tried to knock your own robot over yet?

25-02-2008 17:04

ALIBI

Re: pic: Big Bad Bob

Do you have a picture with bumpers? I will believe your words when you say it is stable, but looking at the picture with at a minimum 70% of the weight above the wheels, I just think it looks really unstable. If/when you tip over will you exceed <R16>? Great looking arm. Do you have a video?

25-02-2008 22:38

Ty Tremblay

Re: pic: Big Bad Bob

No. We don't test our robots. (insert sarcasm here)

29-02-2008 19:28

reflion

Re: pic: Big Bad Bob

How sturdy is the arm? Can it take an impact from a trackball?