View Full Version : pic: Team 1714's 2011 Robot
eric1010
01-03-2011, 18:05
[cdm-description=photo]36596[/cdm-description]
Hey could you post some specs, I would really like to know the weight on this thing.
Chris is me
01-03-2011, 18:07
Wow! :yikes:
It looks like the arm extension is actuated with a pneumatic cylinder, but I can't figure out what makes the arm rotate. Is another pneumatic cylinder used for this purpose, or does a motor drive it?
eric1010
01-03-2011, 18:17
Yes, a single motor drives the arm. The cylinder is a counterbalance.
The weight is very close to 120 lbs
J93Wagner
01-03-2011, 18:19
It's CLEAR! Now it's time to fire up the motors and get going!
Anyway. Sorry about the really bad pun. It looks awesome and I hope to see it in action at Milwaukee.
Duncan Macdonald
01-03-2011, 19:31
Does this robot have a jellyfish based name?
nahstobor
01-03-2011, 20:26
1714 works near a lexan factory, so their robots are mostly built of lexan!
What's better than robotics? :-)
For some reason, I am reminded of Wonder Woman's invisible plane. Neat design!
I have always ALWAYS wanted to build a polycarbonate robot. Great job.
Can you explain the cylinder as a counterbalance? Is it in a closed loop system?
Chris is me
01-03-2011, 20:39
I have always ALWAYS wanted to build a polycarbonate robot. Great job.
1714's done it every year since their founding year. In 2006 and 2007, they used kitbot rails, but since then the robots have not used structural metal.
eric1010
01-03-2011, 20:52
I have always ALWAYS wanted to build a polycarbonate robot. Great job.
Can you explain the cylinder as a counterbalance? Is it in a closed loop system?
The cylinder is mechanical, there is no programming involved. When the compressor turns on, it is pressurized and ready to go. There is a relief valve to let air out when necessary.
However, the arm motor is run by a closed PD loop for preset heights.
The cylinder is mechanical, there is no programming involved. When the compressor turns on, it is pressurized and ready to go. There is a relief valve to let air out when necessary.
However, the arm motor is run by a closed PD loop for preset heights.
So you set the regulator to the pressure you want and just leave the solenoid in one position without controlling it? Interesting and innovative solution.
I'm surprised noone has mentioned this yet but OBVIOUSLY they had to make their minibot with polycarb. :D lol
They work out of "American Acrylics" so its Acrylic not Polycarbonate. Only thing I'm wondering about is the minibot, Polycarbonate is allowed but, rules say nothing about Acrylic. Unless I'm wrong and they use both now.
Chris is me
01-03-2011, 22:56
They work out of "American Acrylics" so its Acrylic not Polycarbonate.
While 1714 works out of American Acrylics, all robot parts are made of polycarbonate. Acrylic would quickly, quickly break.
Acrylic is not allowed but I thought 1714 always used Polycarb.
Katie_UPS
01-03-2011, 23:06
Invisible robot, nice. :)
pfreivald
01-03-2011, 23:13
Okay, that's just cool.
Cool cool cool cool.
Ah nevermind then. I retract my previous statement.
Acrylic is not allowed
Incorrect. Acrylic is allowed, provided you don't go over cost and weight constraints and all those other general rules. However, using it on a robot? Not if it can be avoided; it breaks too darn easily on impact.
BTW, there's a robot in that picture? I only see a bunch of wires and other miscellaneous parts...:D
J93Wagner
02-03-2011, 00:27
What's better than robotics? :-)
More Robotics of course. :)
Incorrect. Acrylic is allowed, provided you don't go over cost and weight constraints and all those other general rules. However, using it on a robot? Not if it can be avoided; it breaks too darn easily on impact.
BTW, there's a robot in that picture? I only see a bunch of wires and other miscellaneous parts...:D
I was referring to the minibot.
Navid Shafa
02-03-2011, 01:32
The weight is very close to 120 lbs
:ahh: That is so hard to believe! I am surprised that it weighs that much...
Rough stats gives the weight of unfilled polycarbonate at 0.043 pounds per cubic inch and the weight of comparative aluminum 6061 at .098 pounds per cubic inch.
I'm sure you pushed the envelope, just would really love to hear where most of that weight went :)
Nice work, Like the design!
Dr Theta
02-03-2011, 09:34
It looks great, and I can only assume that with "continuous improvement" it will be even more beastly when I get to see it in person. I was really excited to see that you guys decided to return to Minnesota. Great team, great robots, enough said.
dbeckwith
02-03-2011, 11:13
What robot? I don't see a robot! *squints* Ohhhhh... :D
It's nearly invisible!
:ahh: That is so hard to believe! I am surprised that it weighs that much...
Rough stats gives the weight of unfilled polycarbonate at 0.043 pounds per cubic inch and the weight of comparative aluminum 6061 at .098 pounds per cubic inch.
I'm sure you pushed the envelope, just would really love to hear where most of that weight went :)
Nice work, Like the design!
Its not that hard to believe, considering that lexan weights more then aluminum.
Nuttyman54
02-03-2011, 15:51
Its not that hard to believe, considering that lexan weights more then aluminum.
Polycarbonate (Lexan) weighs about half as much as the same size piece of aluminum. However, it is not nearly as stiff. To achieve a similar stiffness (which is necessary in things like arms, chassis, etc.) you're going to end up at around the same weight as if you did it with aluminum, maybe even a little heavier. The weight in this robot probably went towards making it stiff enough for the rigors of competition (drivetrains that flex are not fun).
AdamHeard
02-03-2011, 16:01
:ahh: That is so hard to believe! I am surprised that it weighs that much...
Rough stats gives the weight of unfilled polycarbonate at 0.043 pounds per cubic inch and the weight of comparative aluminum 6061 at .098 pounds per cubic inch.
I'm sure you pushed the envelope, just would really love to hear where most of that weight went :)
Nice work, Like the design!
it's less dense than aluminum, but it's used in thicker (and larger pieces) usually. Most of the structural tubing on our robots is 1/16" wall thickness, occasionally 1/8". 1/2" polycarbonate is substantially heavier, while still being less dense.
Chris is me
02-03-2011, 16:06
Its not that hard to believe, considering that lexan weights more then aluminum.
This isn't true.
Navid Shafa
02-03-2011, 20:46
Its not that hard to believe, considering that lexan weights more then aluminum.
Did you not see the stats I posted? I am not saying that I have the exact wieghts per cubic inch, but I'm pretty sure that they're close...
Also, Thanks Nuttyman54 and AdamHeard. Sure it could weigh the same as aluminum if it has increased the thickness, but from the picture, I had trouble noticing any difference in thickness considering it's practically invisible :P
eric1010
02-03-2011, 20:57
Here are some higher resolution pictures:
http://i.imgur.com/XwStOl.jpg (http://imgur.com/XwStO)
http://i.imgur.com/NV2DMl.jpg (http://imgur.com/NV2DM)
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