Climbing the pyramid

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Re: Climbing the pyramid

Post  David Smith on Wed Jan 09, 2013 10:29 pm

I may get it.
We might need a double jointed arm.
A pivit at the claw.


Last edited by David Smith on Wed Jan 09, 2013 10:43 pm; edited 1 time in total

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Re: Climbing the pyramid

Post  Adnaan Peshimam on Wed Jan 09, 2013 10:30 pm

sorry, i was unclear

there is one arm on either end of the robot
the first can reach the lowest bar without too much hassle
the robot lifts up, hanging on the bar
the frame of the robot only protrudes a few inches into zone 2
the second arm now has to span the rest of the distance, which is 30"+
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Re: Climbing the pyramid

Post  Adnaan Peshimam on Wed Jan 09, 2013 10:32 pm

a double jointed arm seems to be the easiest solution at this point
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Re: Climbing the pyramid

Post  David Smith on Wed Jan 09, 2013 10:33 pm

Ken the arm probably is halfway up the height because it must be used twice.
When it flips the arm is needed to be used on the wheel side.
If the halfway point is below 30 inches the arm is reaching up therefore the pivot point is below the bar and the robot therefore is below the bar.


Last edited by David Smith on Wed Jan 09, 2013 10:48 pm; edited 2 times in total

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Re: Climbing the pyramid

Post  kenneth on Wed Jan 09, 2013 10:34 pm

What method of climbing are we talking about, Im rather confused still
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Re: Climbing the pyramid

Post  David Smith on Wed Jan 09, 2013 10:44 pm

Going up the outside, your idea, with torque arm.

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Re: Climbing the pyramid

Post  David Smith on Wed Jan 09, 2013 10:45 pm

Adnaan, we need visual!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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Re: Climbing the pyramid

Post  Adnaan Peshimam on Wed Jan 09, 2013 10:48 pm

files are are being processed as we speak bounce
its my fault actually,ive wouldve been done earlier, but got distracted with an idea for the design of the arm itself Neutral
if everything goes smoothly (ie internet not crapping out), ill have a link on the forum within a half hour tops
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Re: Climbing the pyramid

Post  David Smith on Wed Jan 09, 2013 10:52 pm

I am wrong it is only used once but the pivot must be above the 30"

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strategy analysis pt 2

Post  Adnaan Peshimam on Wed Jan 09, 2013 11:12 pm

[url=https://youtu.be/u3n0fqkAnPg ]https://youtu.be/u3n0fqkAnPg [/url]
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strategy analysis pt 2

Post  David Smith on Wed Jan 09, 2013 11:17 pm

The arm needs to be at least 30 inches off the ground.
Can you change this.

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Re: Climbing the pyramid

Post  kenneth on Wed Jan 09, 2013 11:20 pm

If the arm length is shortened, we would gain more height, if the robot was about 30" high and 32" long, we could climb with shorter arms, and put less stress on the arm parts.
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Robot with pivit arms at 15 " long

Post  chefjohn on Wed Jan 09, 2013 11:43 pm



I drew this diagram on auto sketch with a pivit arm that is in two section each at 15" , it then can span 30 inches total, what do you think?


Last edited by chefjohn on Wed Jan 09, 2013 11:46 pm; edited 1 time in total (Reason for editing : needs detail)

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Re: Climbing the pyramid

Post  kenneth on Wed Jan 09, 2013 11:47 pm

Slight re-interpretation of the rules:
The robot can be touching in any 2 "zones" but not 3 or more.
The robot has to touch each zone on its way up, in order.

this means if we get slightly off the ground *by using the bars in zone 1*, we could reach for level 3 since we are allowed 84" in height in our zone
nevermind, misinterpreted.
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might be too high

Post  chefjohn on Wed Jan 09, 2013 11:49 pm

kenneth wrote:If the arm length is shortened, we would gain more height, if the robot was about 30" high and 32" long, we could climb with shorter arms, and put less stress on the arm parts.

if the bars are 30" and the robot is 30 " it might be too high,

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John's arm

Post  David Smith on Wed Jan 09, 2013 11:56 pm

It looks good john but we really do not want a double jointed arm if we do not need to which I do not think we need.

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double joint idea

Post  chefjohn on Thu Jan 10, 2013 12:11 am

I was thinking like a real arm, if i raise my shoulder slightly then pivit wih my elbow more the force on my shoulder is less, if i straight arm it the force on my shoulder is more. Working them together spreads the force required to lift over 2 spots, less chance of a tear, ( in this case a break ). By using this we can center the robot in the middle and climb.
anyway just an idea, back to marking , saw something on line might post later

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Re: Climbing the pyramid

Post  kenneth on Thu Jan 10, 2013 12:17 am

the amount of work done to rotate at each point will still be the same as if you were to strait arm it. in the case of lifting the robot, the entire mass of the robot is still taken at the point where the arm meets the frame either way.
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Re: Climbing the pyramid

Post  Matt Matys on Thu Jan 10, 2013 1:05 am

I'd like to point out that approximately 2 minutes 13 seconds into Adnaan's video (2:13) that the arm that grabs on to the bar for level 1 will need to then be completely inside the frame of the robot if we try to flip end over end. I understand that the inability to reach level 2 is the main problem, however I feel it's also important to note that should we modify this climbing method, that should the 30 inch (or however long) arm exist inside the frame of the robot, then that will require much 'emptiness' to be present inside the robot.

Again, it's a trade-off for how much space we won't have to work with inside the robot and how much we want to climb that pyramid by modifying out current idea to climb.
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Re: Climbing the pyramid

Post  Adnaan Peshimam on Thu Jan 10, 2013 9:21 am

the reason i took so long to make the video is because i came across the same problem matt mentioned
i was trying to experiment with L-shaped arms but changed them back for the video so as to focus on one problem at a time
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Re: Climbing the pyramid

Post  kenneth on Thu Jan 10, 2013 9:43 pm

Since the rule says we can be in 2 zones at once and only need to touch each zone on the way up, we could stay on the floor, touch level 1, then grab on level 2 to lift, without touching zone 1 and 2 at the same time
then grab in level 3 and its over
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Re: Climbing the pyramid

Post  Adnaan Peshimam on Thu Jan 10, 2013 9:46 pm

remember the floor counts as zone 0, so we have to be off the ground before we can legally grab the bar in zone 2

pretty sure thats what you meant, but it was unclear and just wanted to make sure noone gets confused bounce
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Re: Climbing the pyramid

Post  kenneth on Thu Jan 10, 2013 9:49 pm

basically drive up to the pyramid, hit zone 1, then back up and grab in zone 2. Then we would have to climb without touching zone 0 and 1 at the same time
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dimensions and positioning

Post  Adnaan Peshimam on Thu Jan 10, 2013 10:19 pm

dimensions and positioning

right after finishing the video i realized that i think with the way i made the robot climb we were still in zone 2 at the end Neutral
and i get the sinking feeling that im right....
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Re: Climbing the pyramid

Post  kenneth on Sat Jan 12, 2013 12:44 am

Maybe a breakthrough
Use a wedge with a slot as shown which hooks onto the ramp then rotated. The wedge has to be deployed, then held in place by a brake of some sort, then we drive into a horizontal bar near a corner of the pyramid and also use the "torque bar" idea
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Re: Climbing the pyramid

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