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-   -   How Do you Climb the Rope? (http://www.chiefdelphi.com/forums/showthread.php?t=153237)

jblay 08-01-2017 16:30

How Do you Climb the Rope?
 
What ideas have people had so far? This is a crazy task and I think we are going to see a lot of different designs.

I also think a lot of teams are going to overlook the act of acquiring the rope before climbing it. What are the different designs that people expect to see?

SenorZ 08-01-2017 16:37

Re: How Do you Climb the Rope?
 
I see the main challenge as grabbing and enveloping the rope, so it doesn't "pop out" during the climb.

bobbysq 08-01-2017 16:48

Re: How Do you Climb the Rope?
 
I think with a proper loop, a metal hook attached to a winch could grab on to it. You'd need to be careful to avoid digging into the carpet though.

Lady-of-Fandoms 08-01-2017 18:26

Re: How Do you Climb the Rope?
 
My team has a vague idea. Tie one knot on the rope, just below the maximum height of the robot. Have a mechanism on the back with a claw the width of the rope, and moves up and down between the bottom and top of the bot. Move the claw to the top of the bot, grab the rope above the knot, and pull the robot up.

shrek 12-01-2017 09:58

Re: How Do you Climb the Rope?
 
Look up some lego rope climbing robots. My team has gotten some inspiration from some of the smaller lego robots.
/

GeeTwo 12-01-2017 10:17

Re: How Do you Climb the Rope?
 
We're working four different prototype tracks for climbing. We figured out pretty quickly that securing the rope would be the fiddly bit.
  • "Keyhole" (knot)
  • "Hook Drum" (loop)
  • "Wringer" (plain end)
  • "LevelWind" (plain end)

All but "wringer" involve pulling the rope with a winch/drum/spool. Wringer is more like a continuous intake mechanism.

rocketgamer102 12-01-2017 11:25

Re: How Do you Climb the Rope?
 
My team is considering using a Velcro rope and a Velcro cylinder to pick up the Velcro. It was tested and proven it can lift a robot

Mentor_Rick 12-01-2017 11:26

Re: How Do you Climb the Rope?
 
Quote:

Originally Posted by jblay (Post 1627312)
What ideas have people had so far? This is a crazy task and I think we are going to see a lot of different designs.

I also think a lot of teams are going to overlook the act of acquiring the rope before climbing it. What are the different designs that people expect to see?

As a climber I would love to see a robot replicate an ascender style of getting up the rope.
https://www.rei.com/c/ascenders-and-...cenders&page=1

All you need is 2 of those and friction to ascend a line, no knots or loops needed.

Or even a set of prusik knots to get up the rope.

That being said I think we are going to see a lot of rotary systems as they lean on strengths teams have already developed in the past.

MrForbes 12-01-2017 11:38

Re: How Do you Climb the Rope?
 
We are working on our first prototype design...we'll see what fun things it does, that we didn't anticipate. I'd like us to be able to use the field rope, one less thing to do before/after a match.

It's a neat challenge! And we're working on it right away, first time ever that we've been concentrating on the end game at the beginning of build season.

frodobaggins05 12-01-2017 19:37

Re: How Do you Climb the Rope?
 
My team is considering a pulley with a clamp on it so it will clamp onto the rope and then spin the pulley thus pulling the robot up with it.

snorthey 12-01-2017 20:36

Re: How Do you Climb the Rope?
 
any one thinking cat claw line pulley...or is that causing too much damage to said rope...even if teams rope..

has any one gotten a yes or no on velcro tape on rope.. I hacesee some bots in 3 days use lots of things that are not rope..

EricH 12-01-2017 20:55

Re: How Do you Climb the Rope?
 
Quote:

Originally Posted by snorthey (Post 1630258)
any one thinking cat claw line pulley...or is that causing too much damage to said rope...even if teams rope..

has any one gotten a yes or no on velcro tape on rope.. I hacesee some bots in 3 days use lots of things that are not rope..

There are at least 4 Q&A questions about that topic. Given the volume, and the lack of answers to date, I would expect it to be addressed by update tomorrow.

Ichlieberoboter 12-01-2017 20:57

Re: How Do you Climb the Rope?
 
Quote:

Originally Posted by bobbysq (Post 1627326)
I think with a proper loop, a metal hook attached to a winch could grab on to it. You'd need to be careful to avoid digging into the carpet though.

Yup, that's our team's plan exactly.

ICE_Bear 17-01-2017 20:35

Re: How Do you Climb the Rope?
 
Quote:

Originally Posted by rocketgamer102 (Post 1629946)
My team is considering using a Velcro rope and a Velcro cylinder to pick up the Velcro. It was tested and proven it can lift a robot

What motors work to lift the weight of a robot? Of course some have to, but we are at a loss as to what we could use.

MoistRobot 17-01-2017 20:46

Re: How Do you Climb the Rope?
 
Quote:

Originally Posted by ICE_Bear (Post 1632680)
What motors work to lift the weight of a robot? Of course some have to, but we are at a loss as to what we could use.

You need JVN's Mechanical Design Calculator, a wonderful tool. Linear Mechanism tab should have what you need.


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