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 Stupid programmer question: where does the tread go? - Joel J [more] |
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By: Travis Schuh
New: 25-02-2008 19:13
Updated: 25-02-2008 19:13
Views: 2064 times
Specks:
Drive:
-6 wheel drive with 4.2" wheels
-2 speeds, 6ft/sec and 15ft/sec (using the guts of an AM supershifter)
-4 CIMs
-wheel chains are tensioned by sliding the wheel and using a cam system
-the side plates can be easily taken off to swap wheels or access the insides
Arm and grabber:
-the arm is powered by two fisher price motors geared through the plastic gear boxes
-the grabber uses a fiberglass hoop that we expand and contract to capture the ball
-we have a pneumatic actuated wrist that allows us to quickly capture the ball with the hoop
-we can winch the ball in closer to the center of the robot using timing belt which is attached to the fabric (this allows us to fit within the 80" rule)
-the ball is launched over the overpass by raising the arm, opening the fiberglass hoop, and then using a pneumatic kicker to launch the ball over the overpass
There are more pictures and video on our website at www.spartanrobotics.org.
See you at SVR
-Travis Schuh
Discussion
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25-02-2008 20:33
=Martin=Taylor=
Re: pic: 971's 2008 Robot
That’s awesome! The video explains a lot.
The biggest problem is going to be that pesky flagpole... Which is likely to get tangled in the "sack" when you flick it back.
25-02-2008 20:59
hallk
Re: pic: 971's 2008 Robot
I was going to say where did you get the mutli-colored trackball...then I watched the movie.
25-02-2008 21:13
jgannon
Re: pic: 971's 2008 Robot
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Originally Posted by Travis Schuh
we can winch the ball in closer to the center of the robot using timing belt which is attached to the fabric (this allows us to fit within the 80" rule)
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In any case, this is a really creative gripper, and it looks to be performing very well. I hope you guys will be able to use it without being penalized.
25-02-2008 21:24
Zyik
Re: pic: 971's 2008 Robot
My worry would be that the fabric is going to get tangled on something. If it gets snagged and possibly torn do you have replacements?
26-02-2008 00:51
Travis Schuh
Re: pic: 971's 2008 Robot
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Originally Posted by jgannon
Can you explain how you do, in fact, fit inside the 80" rule? I'm going to make a few assumptions, but it should still pan out. Around the 00:30 mark in the video, you flip your gripper out, and the fabric lands past the far side of the ball. Even if we assume the fabric to be infinitely narrow, it must be at least 78" from the back of your robot. The robot is probably 28" wide plus 3" bumpers on each side. sqrt(78^2 + (34/2)^2) = 79.83". Since the fabric does actually have dimensions... it has to be outside. Am I missing something?
In any case, this is a really creative gripper, and it looks to be performing very well. I hope you guys will be able to use it without being penalized. |
The only time we start to run into issues is when we have the arm strait out with the hoop strait out. We never need to go into this playing configuration, so as long as we avoid it we should be fine.
Thanks for the comments.
-Travis
26-02-2008 11:10
AustinSchuh
Re: pic: 971's 2008 Robot
Also, when we lift the ball up to hurdle, we pull it up the arm. That makes it so that we are in the 80" rule while the arm and ball are sticking strait out from our robot.
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