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  #61   Spotlight this post!  
Unread 23-01-2010, 01:12
Steve_Alaniz Steve_Alaniz is offline
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Re: Robot Lifting

This is such an elegant solution you should be applauded for thinking outside the box! The one problem I see is the 84in right cylindrical rule. if you make a 28" robot, and you'll have to assume your alliance partner is driving on it's 38" dimension that will determine the size of the platform on the vertical frame assembly. that accounts for 66". Since the rules state that the entire robot in it's finale configuration must fit within an 84" cylinder, I'm not sure you can manage a ramp long enough to allow for a 45 degree ramp angle to accommodate your alliance partner. You may have to do some fancy timed folding. I haven't looked at the numbers close enough so I don't know if that will indeed be an issue.

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Originally Posted by Sunshine View Post
Here is an idea that our team came up with that we believe would work and is outside the norm of lifting a robot that others may not think of. I was extremely proud of all of the ideas that the students generated this year for lifting. Besides this idea, they also came up with a great idea for lifting using the vertical bars. For the record, we are not using either idea. We are using the KISS method (Keep It Simple Students) and believe that we will have a lifting robot that can do the job quickly, efficiently and is simple.

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Unread 23-01-2010, 17:27
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Re: Robot Lifting

Me and couple of my teammates had this idea that we call "wings". basically we thought of folded arms that unfold outside the robot and create 2 forklift-like platforms on both sides of the robot.


Our mentors said it's impossible and we're gonna break our wings on our first try.
what do you think?
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Unread 23-01-2010, 17:32
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Re: Robot Lifting

Quote:
Originally Posted by MikePres View Post
Me and couple of my teammates had this idea that we call "wings". basically we thought of folded arms that unfold outside the robot and create 2 forklift-like platforms on both sides of the robot.


Our mentors said it's impossible and we're gonna break our wings on our first try.
what do you think?
Nothing is impossible given enough time, weight, and money.

You'll have 150 lbs of robot 2+ feet out from your torsional point. So your ramps will need to support 300+ lb-feet of torsion. Not impossible, but not something to be undertaken lightly.

We were looking at holding to the vertical bar and flipping our robot upside down. At a lever arm of around 4 feet when the bot was horizontal, and considering the grab points on the bar would have been around 6 inches apart, you're lookin at over 1/2 ton of torsion / shear on the tower (and your gripper). Not something we felt comfortable engineering to.
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Unread 23-01-2010, 18:03
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Re: Robot Lifting

Quote:
Originally Posted by MikePres View Post
Me and couple of my teammates had this idea that we call "wings". basically we thought of folded arms that unfold outside the robot and create 2 forklift-like platforms on both sides of the robot.


Our mentors said it's impossible and we're gonna break our wings on our first try.
what do you think?
Someone did something similar to this in 2007. Granted it wasn't as high, but they made it work. I belive they way they did it was each "wing" was rotated up once the alliance partners were on them. Then a leg would pop down to hold the wing in place after power down. It was kinda cool to watch
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Unread 23-01-2010, 18:39
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Re: Robot Lifting

That's a lot like an idea I had at the beginning of the year. I'm not doing it because it takes a LOT of engineering to get it right, with almost no room / weight / motors for a kicker.
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Unread 23-01-2010, 19:00
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Re: Robot Lifting

Quote:
Originally Posted by MikePres View Post
Me and couple of my teammates had this idea that we call "wings". basically we thought of folded arms that unfold outside the robot and create 2 forklift-like platforms on both sides of the robot.
Can you fit that inside the 84" FINALE CONFIGRATION cylinder? Your robot alone is about 34" (including bumpers). Your forks could only extend 22 or 24 inches on either side. Would another team take a gamble on balancing on a fork that wasn't at least as wide as their robot?
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Unread 24-01-2010, 07:12
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Re: Robot Lifting

Quote:
Originally Posted by Chris is me View Post
That's a lot like an idea I had at the beginning of the year. I'm not doing it because it takes a LOT of engineering to get it right, with almost no room / weight / motors for a kicker.
THis is why we decided against the ramp/wings idea too.
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Unread 24-01-2010, 11:16
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Re: Robot Lifting

Quote:
Originally Posted by Gnishi2011 View Post
THis is why we decided against the ramp/wings idea too.
Ditto.
The idea came up, but the sacrifices to do it were too great.
If you could do it and still play the game for the other 1:40, it would be bennificial to the team.
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Unread 24-01-2010, 11:54
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Re: Robot Lifting

Has anyone found a good hook to order for getting onto the bar? Or, is everyone doing a hook just going to make their own?
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Unread 24-01-2010, 11:59
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Re: Robot Lifting

Spiffy, just buy a 1/4" aluminum plate from mcmaster and use a bandsaw to cut your hook out of it.
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Unread 24-01-2010, 15:29
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Re: Robot Lifting

At first, I was excited about this idea, but after some time I realized myself the problem -

3 words: Plane of Platform.

This system cannot be static, but if it lifts the ramps above the paltform's plane, no prob.
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Unread 24-01-2010, 15:40
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Re: Robot Lifting

Quote:
Originally Posted by MikePres View Post
Me and couple of my teammates had this idea that we call "wings". basically we thought of folded arms that unfold outside the robot and create 2 forklift-like platforms on both sides of the robot.


Our mentors said it's impossible and we're gonna break our wings on our first try.
what do you think?
you can get "wings" to work, we called them forks

http://www.chiefdelphi.com/media/photos/27790
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Unread 24-01-2010, 15:52
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Re: Robot Lifting

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Originally Posted by Aren_Hill View Post
you can get "wings" to work, we called them forks

http://www.chiefdelphi.com/media/photos/27790
I'm not climbing on that.
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Unread 24-01-2010, 16:24
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Re: Robot Lifting

They got redone for IRI that year, less risky
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Unread 24-01-2010, 17:01
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Re: Robot Lifting

where did those platforms come from?
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