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-   -   Picking up from both sides (http://www.chiefdelphi.com/forums/showthread.php?t=100602)

Andrew Lawrence 18-01-2012 21:40

Picking up from both sides
 
A subject came up at our meeting today about making it so we have the ability to pick up balls from both sides. It would require no extra pulleys, etc., however would leave the entire middle part of our robot open, relying on other currently unknown ways to strengthen the frame.

I' can go either way, but I want to see CD's opinion on this subject. What are your thoughts on how to do it, and why?

EDIT: Would it be legal in the bumper rules if both sides of a wide-based robot were open for pick-up?

Thanks!

team1759 18-01-2012 21:52

Re: Picking up from both sides
 
we were wondering the same thing.

live long and prosper

reply to us when u find out so we can destroy you. lololololol :) :) :) :)

Peyton Yeung 18-01-2012 21:53

Re: Picking up from both sides
 
We thought of this but we decided against it because we though it would require some sort of hopper. We didn't think that was a necessity this year with the three ball rule.

David Guzman 18-01-2012 21:53

Re: Picking up from both sides
 
I personally don't think it is worth the trouble. It would most likely raise you center of gravity too. Since there is a limit of three balls I don't see a HUGE advantage.

BrendanB 18-01-2012 21:54

Re: Picking up from both sides
 
Sounds great for an increased pickup area but would require a lot of extra work and when your drive can pull a quick 180!

EricH 18-01-2012 22:10

Re: Picking up from both sides
 
If you have a 2006 Behind the Design, someone did do that. I don't remember who, though.

Tom I 18-01-2012 22:31

Re: Picking up from both sides
 
Quote:

Originally Posted by EricH (Post 1108741)
If you have a 2006 Behind the Design, someone did do that. I don't remember who, though.

It was FIRST Team 123 (page 82 if anyone has the book). They specialized in picking up from both ends and dumping, but they didn't have a thrower. They had a big open hopper to store the balls in.

In this game, I think you're not going to want to. Even if we could pick up an unlimited number of balls, it'd still be better to only have one gatherer. Not only is it easier to build and maintain, it'd be easier for most to control. MOST (there are exceptions to everything) drivers have it easier maintaining ONE frame of reference, as in "I pick up from the front." The time it takes to switch orientation from driving forwards to back probably isn't that much faster than pulling a U-ey in an agile robot, so I'd say focus your efforts elsewhere.
That being said, if your team's hearts are set on it, go for it! Let us know how it turns out!

Andrew Lawrence 18-01-2012 22:36

Re: Picking up from both sides
 
Thanks everyone for your replies! I'll show my team the results of this.

KrazyCarl92 18-01-2012 22:52

Re: Picking up from both sides
 
Quote:

Originally Posted by SuperNerd256 (Post 1108713)
relying on other currently unknown ways to strengthen the frame.

Hockey Sticks!:::safety::

Squeakypig 18-01-2012 23:02

Re: Picking up from both sides
 
Our team has come up with some designs for this exact method and also some strategies to implement it. If you are creating a bot that is not super agile this is a great method, no need to turn, keep the turret lined up on the net, don't always have to rely on the targeting program to aim 100% correctly. With this design you will have to shoot balls more frequently since you can only hold 3 at a time and it is a great way to clear all of the REBOUNDS from your opponents goal. Think about it, line up your robot so it collects parallel to the fender on your opponents side and launch all of the balls over to your side for a "dunker" robot to put them in real quickly.

Every design idea has a good strategy you can implement with it. It just has to be the strategy your team wants to do.

Claimer: This was an idea that was brainstormed and prototyped. This design will not necessarily end up on the final designs for team 2851 Crevolution.

Andrew Lawrence 18-01-2012 23:19

Re: Picking up from both sides
 
I added to the question (didn't want to make a whole new thread). What are your thoughts on that?

Thanks all! I really appreciate it!

VKP 18-01-2012 23:26

Re: Picking up from both sides
 
Our team has been thinking about (and CADing) picking up from both sides, because we want to be able to rush backwards at the beginning of autonomous and grab balls from the coopertition ramp( after firing our initial two preloads). Of course, it all depends on what kind of shooter we build and were we put it on the robot, but we are open to the possibility that we might need to pick up from both sides.

ToddF 18-01-2012 23:48

Re: Picking up from both sides
 
Quote:

Originally Posted by VKP (Post 1108811)
Our team has been thinking about (and CADing) picking up from both sides, because we want to be able to rush backwards at the beginning of autonomous and grab balls from the coopertition ramp.

If you had a robot that loaded from the front, you could position it in the key with the front of the frame (with ball pickup) facing the ramp. Shoot your balls with the shooter pointing behind you, drive forward to the ramp, and get the ramp balls.

Aren Siekmeier 19-01-2012 00:03

Re: Picking up from both sides
 
The bumper rules say nothing about the number of openings, so it is very possibly to do this legally.

As for the strategic value, we considered it, but determined that the added complexity in having a second intake and somehow joining them was not worth the saved time of turning the robot 180º. However, this does mean that we are going to be careful and deliberate about which side we put our one intake on (behind or in front of - or even to the side of - our scoring mechanism).

Ben27Lacrosse 19-01-2012 00:48

Re: Picking up from both sides
 
3 Attachment(s)
My team is planning on being able to pick up from all four sides.:D
I attached what we have in CAD so far!


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