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 Remember those two words people. Gracious Professionalism. - Elgin Clock [more] |
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Final assembly of sensors in the robot, minus wiring.
Discussion
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26-02-2008 12:46
Graham Donaldson
Re: pic: Big Mouse 2
Heaven forbid that I seem uneducated/dimwitted/not seeing the obvious, but what exactly does it do?
26-02-2008 12:56
Tom Line
Re: pic: Big Mouse 2
It's a mouse ball - or it works along the same principle. When the robot moves in the x, the ball rotates in the x and turns an encoder. Likewise in the y. In this manner, they use the mouseball for absolute positioning and use the gyro for heading.
26-02-2008 13:09
Tottanka
Re: pic: Big Mouse 2
so it is supposed to touch the ground at all times?
what about the bump under the overpass?
26-02-2008 13:20
artdutra04
Re: pic: Big Mouse 2
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Originally Posted by Tottanka
so it is supposed to touch the ground at all times?
what about the bump under the overpass? |
26-02-2008 14:11
EricH
Re: pic: Big Mouse 2
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Originally Posted by Tottanka
so it is supposed to touch the ground at all times?
what about the bump under the overpass? |
What's this about a bump under the overpass? Is there something I missed?
26-02-2008 14:41
GaryVoshol
Re: pic: Big Mouse 2
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Originally Posted by EricH
The lane divider bump shouldn't do a whole lot.
What's this about a bump under the overpass? Is there something I missed? |
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6.2.3 The LANE DIVIDER The TRACK is divided by a LANE DIVIDER that extends along the major axis of the TRACK. The LANE DIVIDER is six feet tall and approximately 27 feet long. It is constructed of 1-1/2 inch O.D. steel pipe and connecting hardware, forming railing panels. The openings in the railing panels are filled with clear plastic to prevent portions of ROBOTS from inadvertently passing through the structure. The LANE DIVIDER is attached to vertical posts that are anchored to supporting plates covered by carpet. Note that these plates will create a bump in the carpet approximately 1/2 inch tall, and as a result the surface of the TRACK will not be perfectly flat. ROBOTS must be designed to accommodate these surface variations. The LANE DIVIDER is attached to the floor such that it should remain vertical and not move when struck by ROBOTS. |
26-02-2008 14:45
IbleedPink233
Re: pic: Big Mouse 2
I like it - it is very clever way to track position in hybrid (maybe teleop, too?) - hopefully eliminating the issue of wheel slippage with encoders on drive wheels. Seems perfect for swerve drive control, especially (which I don't think you have, but I could be wrong).
By the way, I thought that I'd make the blatantly obvious Trackball observation.
26-02-2008 14:48
EricH
Re: pic: Big Mouse 2
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Originally Posted by GaryVoshol
This is what you evidently missed:
Quote:
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I knew about the lane divider bumps already.
26-02-2008 14:55
GaryVoshol
Re: pic: Big Mouse 2
OK, I assumed they meant the lane divider bump that is even with the overpass. Yeah, that's my story, and I'm sticking to it ... I didn't misread the question. 
I recall another BUSTED myth, that there would be a slight bump at the finish line. Someone's depth perception was thrown off by the checkerboard pattern.
26-02-2008 15:23
Manoel
Re: pic: Big Mouse 2
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Originally Posted by IbleedPink233
I like it - it is very clever way to track position in hybrid (maybe teleop, too?) - hopefully eliminating the issue of wheel slippage with encoders on drive wheels. Seems perfect for swerve drive control, especially (which I don't think you have, but I could be wrong).
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We are using it in teleoperated mode as well to keep the robot driving/strafing straight. Hopefully everything is going to work in a crowded field!
26-02-2008 22:06
JM987
Re: pic: Big Mouse 2
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Originally Posted by GaryVoshol
OK, I assumed they meant the lane divider bump that is even with the overpass. Yeah, that's my story, and I'm sticking to it ... I didn't misread the question.
I recall another BUSTED myth, that there would be a slight bump at the finish line. Someone's depth perception was thrown off by the checkerboard pattern. |
26-02-2008 22:09
MDiff
Re: pic: Big Mouse 2
I like it a lot!
Looks very cool, and the nerd in me loves that it's a trackball 
Although does it come with the same problems of a trackball? Get dirt in there and it fudges up 
I noticed the springs to keep pressure forward, but it has something that restricts that movement right? as to not get very weird when lifting the robot
Speaking of which, i noticed you guys have mecanum (or we're assuming you do), have you ever run into the issue of having come off the floor having hit a corner too quickly and have the trackball skip any?
or is it only for autonomous?
sorry for the confusing sentence structure... 
26-02-2008 23:14
Manoel
Re: pic: Big Mouse 2
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Originally Posted by MDiff
I like it a lot!
Looks very cool, and the nerd in me loves that it's a trackball Although does it come with the same problems of a trackball? Get dirt in there and it fudges up I noticed the springs to keep pressure forward, but it has something that restricts that movement right? as to not get very weird when lifting the robot Speaking of which, i noticed you guys have mecanum (or we're assuming you do), have you ever run into the issue of having come off the floor having hit a corner too quickly and have the trackball skip any? or is it only for autonomous? sorry for the confusing sentence structure... |
It does get dirty so we will be checking on it before each match.Neither the mouse nor the ball will fall off of the robot if it's lifted.
The entire structure is compressed about two inches by the springs, so small bumps shouldn't really make us lose contact with the ground.
We do plan on using it for teleoperated mode, but the driver has the possibility to turn off all automation and drive unassisted if he wants to.
26-02-2008 23:23
Cow Bell Solo
Re: pic: Big Mouse 2
I like the idea I might want to know your plans as we might impliment it next year
27-02-2008 00:45
Gabe
Re: pic: Big Mouse 2
Freakin' ingenious...
Creations like these show me that that there ARE new things to be found that were never even thought of before. 
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