Team Kika Mana 368 1.20 sec minibot

[TKM.368]

Hey folks - we'll see you on Curie later this week !!

Mahalo to 987 for the photoresistor idea and 233 for the ramp idea.

http://www.youtube.com/watch?v=mmT9nTWqDOU
http://www.youtube.com/watch?v=hfvE1Me5dI8

[IBdrummer]

That is pretty fast...but I get the feeling these 100th of a second times are getting a bit crazy in the minibot arms race.

Not saying that your minibot doesn't get up in 1.20 s, but I'm interested to see if they hold up on the field. That goes both ways though, I'm thinking its a 1.2 +- .05ish in the accuracy range, but I guess we'll see if two really fast minibots go against each other.

[TKM.368]

Originally Posted by IBdrummer

That is pretty fast...but I get the feeling these 100th of a second times are getting a bit crazy in the minibot arms race.

Aye, well, put another way then it's 36 frames when recorded at 30 frames per second.

Yes, the arms race is definitely heating up! Good luck to all!

[jspatz1]

At the risk of saying it out loud and then having someone beat it, 1.2s is beginning to have the look of a theoretical limit for the tetrix motors and battery.

[IBdrummer]

Originally Posted by TKM.368

Aye, well, put another way then it's 36 frames when recorded at 30 frames per second.

Yes, the arms race is definitely heating up! Good luck to all!

Then +-.02 error? Either way at that point I'm pretty sure battery life and various other factors will come into it more than anything else come competition time.

I'm really hoping there are a lot of opportunities for the fastest minibots to race in St Louis. As long as those pressure senors at the top work well, it'll make the end game really interesting.

[Norman J]

Originally Posted by jspatz1

At the risk of saying it out loud and then having someone beat it, 1.2s is beginning to have the look of a theoretical limit for the tetrix motors and battery.

Haven't timed it myself with a high-speed camera or anything, but I think 1114's minibot from Waterloo was near 1 sec.

[The Lucas]

Originally Posted by Norman J

Haven't timed it myself with a high-speed camera or anything, but I think 1114's minibot from Waterloo was near 1 sec.

Using this vid and going frame by frame, I got 1.3 sec (39 frames). That's just one match (lights were not even on but you can see it hit the top) not a full study.

Good job, Kika Mana! I am sure I will get a chance to see that amazing minibot since we will probably be pit neighbors. From what I've seen you already had the fastest (competition) mini bot in the Curie division from your times in the the Hawaii regional, and you just shaved a tenth off!

[Norman J]

Originally Posted by The Lucas

Using this vid and going frame by frame, I got 1.3 sec (39 frames). That's just one match (lights were not even on but you can see it hit the top) not a full study.

My bad. I must have been so awed at their tube-scoring I lost the ability to keep track of time. Just out of curiosity, did you count from the color change or the beginning of minibot movement?

[Mark Sheridan]

Originally Posted by IBdrummer

Then +-.02 error? Either way at that point I'm pretty sure battery life and various other factors will come into it more than anything else come competition time.

I agree, we were testing our minibot this weekend, we started out with a partially drained battery that was cold. We then charged it a immediately tested after it was done, the battery was pretty warm and we had a slower time, roughly .2-.3 seconds slower. We all remembered that a hotter the battery, lower its power output. We try to let our batteries cool, even for the hostbot batteries. Sometimes though, we forget.

Cool minibot by the way. Can you explain the photo-resister?

[Norman J]

Originally Posted by Mark Sheridan

Cool minibot by the way. Can you explain the photo-resister?

Not from 368, but I imagine it detects the color change of the tower to trigger the launch with the photo-resistor. It's visible in the video as the black object extending out to the base of the tower.

[The Lucas]

Originally Posted by Norman J

My bad. I must have been so awed at their tube-scoring I lost the ability to keep track of time. Just out of curiosity, did you count from the color change or the beginning of minibot movement?

Minibot movement, as soon as I see the minibot move I go back a frame and that is the start point. Color change would vary too much from match to match.

[jspatz1]

Originally Posted by Mark Sheridan

I agree, we were testing our minibot this weekend, we started out with a partially drained battery that was cold. We then charged it a immediately tested after it was done, the battery was pretty warm and we had a slower time, roughly .2-.3 seconds slower. We all remembered that a hotter the battery, lower its power output. We try to let our batteries cool, even for the hostbot batteries. Sometimes though, we forget.

I can see it now, a mini-fridge in every pit.

[Hjelstrom]

Originally Posted by TKM.368

Hey folks - we'll see you on Curie later this week !!

Mahalo to 987 for the photoresistor idea and 233 for the ramp idea.

http://www.youtube.com/watch?v=mmT9nTWqDOU
http://www.youtube.com/watch?v=hfvE1Me5dI8

Wow, that is an awesome minibot and deployment system!

[crazyStone]

In theory if you create small diameter shafts as rollers, you could, (not saying we have, because we didn't) gear the textrix motors up to 14,000 or 20,000 rpms, and given that the shaft size isn't so large that it burns out the motors you could theorticallly be looking at a .5-.7 second ascent. Now if only I had thought about it a few weeks ago, but oh well we shall be satisifed with our 1.4 second deploy and climb good luck to you all at st. louis.

[The Lucas]

Originally Posted by jspatz1

I can see it now, a mini-fridge in every pit.

No, a dry ice box would be way cooler
It would be awesome to walk out to on the field, pull the minibot out of cooler with fog flowing all around (smoke machine )and load it into the robot.

The minibot kids really wanted to do this but of course it is an unnecessary frostbite hazard