How many seconds to climb the rope?

[norabaccam]

My team has been working on our rope climbing mechanism, and we are curious of how many seconds of the 30-second time limit you guys think your robot will take to climb the rope

[liz.nelson.208]

This many:

[bearbot]

Right now we comfortable with 15 seconds but we're working on a faster method as right now.Our goal is between 5-10 seconds for CHS districts championship

[frodobaggins05]

Originally Posted by bearbot

Right now we comfortable with 15 seconds but we're working on a faster method as right now.Our goal is between 5-10 seconds for CHS districts championship

How did you get it to climb?

[D_Price]

We are sitting right at about 9 seconds climbing but are looking to push it a little farther once everything is built into the robot.

[Ari423]

Are we talking about just time spent physically moving up the rope or including time to align? It will probably take use a good 20+ seconds to line up and climb, but the actual climb should only take ~4 seconds (according to the JVN calc).

[Richard Wallace]

• The touch pad is 58 inches from the floor.
  
• A robot attaching to the rope 23 inches from the floor must raise itself 35 inches to reach the touch pad.
  
• The energy required to raise a 150 lb robot 35 inches is about 600 Joule.
  
• One CIM motor can operate at >300 Watt output power for a few seconds.
  
• => Two CIM motors can deliver 600 Joule in about one second.

If mechanical efficiency is high enough, a climbing mechanism powered by two CIM motors can complete the lift in about one second, after the attaching to the rope. Some mechanisms might be made even faster, by attaching to the rope at a greater initial height.

Time required to reach the rope and attach will be the limiting factor on how many seconds a drive coach will need to allow at the end of a match.

[norabaccam]

Originally Posted by Ari423

Are we talking about just time spent physically moving up the rope or including time to align? It will probably take use a good 20+ seconds to line up and climb, but the actual climb should only take ~4 seconds (according to the JVN calc).

Talking about the actual climb. My team was planning to climb the rope definitely under 10 seconds, and I agree that lining up may take a while.

[cad321]

We're currently climbing in ~6 seconds. Hopefully a little less by the end of the build.

[MrForbes]

we plan on about 5 seconds for a climb. We'll see what happens...still figuring out what the robot will weigh. I think today's test with a light robot simulator was less than 5 seconds.

[OMGRobots1]

We tested on a ~40 pound robot, and it was well under 5 seconds, probably around 3. We intend to keep it under 5 seconds on the real robot.

[D_Price]

I feel like that will be the golden ticket for Regionals at least.

Originally Posted by OMGRobots1

We tested on a ~40 pound robot, and it was well under 5 seconds, probably around 3. We intend to keep it under 5 seconds on the real robot.

[Basel A]

Originally Posted by Richard Wallace

• The touch pad is 58 inches from the floor.
  
• A robot attaching to the rope 23 inches from the floor must raise itself 35 inches to reach the touch pad.
  
• The energy required to raise a 150 lb robot 35 inches is about 600 Joule.
  
• One CIM motor can operate at >300 Watt output power for a few seconds.
  
• => Two CIM motors can deliver 600 Joule in about one second.

If mechanical efficiency is high enough, a climbing mechanism powered by two CIM motors can complete the lift in about one second, after the attaching to the rope. Some mechanisms might be made even faster, by attaching to the rope at a greater initial height.

Time required to reach the rope and attach will be the limiting factor on how many seconds a drive coach will need to allow at the end of a match.

Yep. Why climb slow when you can climb fast?

[pmattin5459]

I think that the goal is less than 5 seconds for a relatively light 'bot. Alignment might take more time, depending on how well the mechanism grabs on to the rope, but there are so many different ways to attach onto a rope that it'll be relatively easy to find an optimal solution.

[GeeTwo]

I saw a post where a team is using a single BAG and expects a 4 second climb. With proper gearing and level winding, the numbers make sense.

When you plan your start time, don't forget to account for the one-second hold - you need to be depressing the touchpad by T=1.