Chief Delphi - Climbing Mechanism Ideas

Chief Delphi (http://www.chiefdelphi.com/forums/index.php)

- General Forum (http://www.chiefdelphi.com/forums/forumdisplay.php?f=16)

- - Climbing Mechanism Ideas (http://www.chiefdelphi.com/forums/showthread.php?t=110547)

Re: Climbing Mechanism Ideas

Quote:

Originally Posted by dellagd (Post 1215137)

Our team has had a long running joke of building a "Rave"-bot for competition.

You've made my day.

And of course:

IMAGE REDACTED[/IMG]

Of course, and before going to Ramp Riot, where we brought an off-season project robot, our auton was set to spin in circles and play Gangnam Style from the driverstation while flashing LEDs :)

Unfortunately we had to change it to actually do something, though :(

Re: Climbing Mechanism Ideas

Quote:

Originally Posted by enigmatic (Post 1214888)

We have an idea for a climber that will go up to the third level and then dump four colored discs in. We would score fifty points everytime, but there is resistance from members of the team because 1)we do not have a pyramid to test it on yet, making it difficult to do and 2) they believe we can score more points shooting. The reason for the disconnect is differing beliefs on how accurate shooters are going to be. Those who want a shooter believe at least 75%, but those who want a climber think it will be much lower than this.

Solid idea, don't forget to consider using one mechanism for multiple tasks. For example, you would make your alliance value much higher if you used your frisbee dumper to score 3 frisbees in the low goal during auto and continuing to score there or play defense during the game.

That would help offset the some of the negatives that come with this robot idea...
Originally Posted by RRLedford
The flipping or "rolling" up the corner edge with alternating short grip arms is how we are prototyping to go up the pyramid. Our style of gripper will not need to squeeze hard or damage the power coated tubes. The angle formed by the intersecting horizontal tubes is how/where we will grip, avoiding the slope tube entirely.

Quote:

We will not drive; only shoot 2or 3 in autonomous. We may hoist others up, if we can keep hoist near enough to level rungs to have partner(s) bump them on the way up. They may have to extend some to snag our hook, since we can only lower it so much, but even if we only pull them up to the 20 pt. level, that is a nice bonus for a no driving bot to make.
-Dick Ledford

good luck to both teams, I would certainly consider either of your robots for my alliance!

Re: Climbing Mechanism Ideas

A lot of you guys are mentioning the 54" cylinder, which is great. However, don't forget about the max frame perimeter of 112"! A 30" square bot would be at 120"!

Re: Climbing Mechanism Ideas

Quote:

Originally Posted by cmrnpizzo14 (Post 1215226)

We would potentially be able to shoot two in during auton, but that is about it. We would make sure to climb the pyramid early so as to make sure that we have time to gt up, otherwise we lose all of our points. So depending on how quickly we will be able to make it up, we might not play much defense.

Re: Climbing Mechanism Ideas

Quote:

Originally Posted by RRLedford (Post 1214051)

We will be able to grasp next higher level BEFORE releasing from one below. We will not tip or swivel around laterally, because our grasp mechanism will bridge across the two intersecting horizontal tubes, yet avoid contacting the slope tube.
....
The robot will be kind of vertically notched so it can straddle the corner edge tube at match start, allowing center of mass to be starting nearer to the initial gripping points.

-Dick Ledford

Now add to that a wheel which extends underneath the robot to prop it against the bar while reaching for the next level and we are considering the same design. We've even prototyped a mechanism which successfully climbed the pyramid unweighted. Trying to fit it into the cylinder is proving to be very difficult. If used, the enormity of the mechanism will force us to sacrifice a lot of our disc-shooter-goal scoring ability, which some of our team is strongly against.

When you start to CAD these designs one thing becomes apparent: either you focus on the climb, or you focus on the discs. Doing both well: nearly impossible.

Personally, I really like the 50 pt climb and dump strategy.

The advantage in my mind is that it allows you to score all of your points really fast and lets your team focus on perfecting a repeatable task.

If you're robot is only designed to climb and dump, you can spend the rest of the match playing defense. Essentially, you are forcing the other alliance to score 50+ pts under heavy D.... or.... beat you up the pyramid (which is unlikely if you have optimized your robot for this strategy).

If you focus on scoring discs. You need to be better at scoring discs than anyone else to win. There will be lots of bots scoring discs and you will need to outscore them. Very few will attempt the 50 pt strategy.

Re: Climbing Mechanism Ideas

If used, the enormity of the mechanism will force us to sacrifice a lot of our disc-shooter-goal scoring ability, which some of our team is strongly against.

When you start to CAD these designs one thing becomes apparent: either you focus on the climb, or you focus on the discs. Doing both well: nearly impossible.

Personally, I really like the 50 pt climb and dump strategy.

The advantage in my mind is that it allows you to score all of your points really fast and lets your team focus on perfecting a repeatable task.

If you're robot is only designed to climb and dump, you can spend the rest of the match playing defense. Essentially, you are forcing the other alliance to score 50+ pts under heavy D.... or.... beat you up the pyramid (which is unlikely if you have optimized your robot for this strategy).

If you focus on scoring discs. You need to be better at scoring discs than anyone else to win. There will be lots of bots scoring discs and you will need to outscore them. Very few will attempt the 50 pt strategy.[/quote]

My thoughts exactly. We have others on our team who do not like the idea though.

Re: Climbing Mechanism Ideas

Quote:

Originally Posted by =Martin=Taylor= (Post 1215853)

What makes you say that?

Re: Climbing Mechanism Ideas

I know this thread has been dormant for a while, but Sparky is trying to lighten our bot with switching our super shifter climbing mechanism to a tough box 3 stage. Does anybody have experience with this transmission? We are at a fork in the road try this and find the bugs or lighten the super shifter. Video of us climbing at the shop: http://www.youtube.com/watch?v=G8iIy...ature=youtu.be