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Unread 21-02-2007, 12:19
WesleyC WesleyC is offline
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Re: pic: 1825

A few of Chuck's features:


Physical:
2 CIM motors powering high-traction wheels via chain/sprocket system
Shielded electronics case
Highly mobile and fast
3/4 of the robot's total weight centered over drive wheels, providing unparalleled traction for our weight
Incredibly light, coming in at 90 pounds including battery, 77 without!
I-frame arm construction prevents bending and twisting

Electrical/programmed:
Effective autonomous mode
Shielded wiring and programming redundancy protects against sensor damage
Programmed in such a way that it will refuse to break itself
Incredibly simple to drive
State programming enables robot's arm and wrist to return to a given position if bumped
Code has the ability to "learn" what the robot's current state is and some possible deficiencies, then work around them



Now for a few quick anecdotes...

Our arm, one might say, looks very heavy. Extremely heavy. Heavy enough that one wonders how that tiny fisher-price motor manages to lift it. However, it isn't so.

The arm is constructed out of a fiberglass/foamboard combination material that is extremely durable and strong, but very light. The whole arm weighs less than 5 pounds, and with the wrist and claw added it's still less than 7 pounds.



Some of our mentors were... shall we say, rather skeptical about a material this light. "How will it hold up under pressure?" they asked. "Won't it break off as soon as we try to use it?"

After an unfortunate incident involving a badly damaged ceiling fan (11-12 feet up, I might add--this robot will certainly be capable of scoring ringers on the high goal!) set to high speed, a completely undamaged arm and claw, and a team mentor spending several hours attempting to bend the brass fittings of his fan back into shape, the murmers stopped.

Our team members also were rather reassured after the robot slammed its arm into our rack at near full speed during the early stages of driving practice, shifting the full-size rack but not even putting a nick in the arm.

The robot is certainly back-heavy, however to date due to the control algorithms and other factors we have been pretty much unsuccessful tipping it unless we were absolutely trying to tip it. Also, all the major weight pieces (battery, drive motors, major structural elements) are fairly low, giving us a low COG. This also gives us enough traction to climb ramps easily.

Last edited by WesleyC : 21-02-2007 at 12:19. Reason: Clarification
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Unread 21-02-2007, 19:39
Bob's Avatar
Bob Bob is offline
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Smile Re: pic: 1825

[quote=WesleyC;583301]A few of Chuck's features:


Our robots name is chuck. I did not know there was another one named chuck. That is Awesome. Where did you guys get that name?
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Unread 22-02-2007, 09:40
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kcducttaper kcducttaper is offline
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Re: pic: 1825

I'm not sure really. I started calling him Chuck because.........I don't remember. I guess it just stuck.
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