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-   -   pic: Team 25 robot (http://www.chiefdelphi.com/forums/showthread.php?t=19149)

CD47-Bot 11-03-2003 22:40

pic: Team 25 robot
 

ggoldman 11-03-2003 22:42

I think that is a very impressive bot.

It looks like you have what it takes to be one of the top teams at annopolis.

I would just look of for a tipping effect on your bot if another robot got to the hill as soon as you did. With you arm, it might make it a bit top heavy.


6 wheel drive..nice..

look foward to seeing your bot in action...

see you this weekend..

Gabe G.

David Lantz 11-03-2003 22:52

Looks like a good bot. I hope you have plenty of replacement arms because you'll probably need them. Good luck at your regional.

K. Skontrianos 11-03-2003 23:47

What's its wingspan?

Mike Schroeder 12-03-2003 00:22

Lemme put all your worries to rest



GGoldman: If our robot tips, the mechinism that raises up and down, can correct us.

David Lantz: those arms are made of aircraft aluminum, plenty strong, also, thye are powered be pnematic piston, they were specificly made to knock the wall down not to hit robots after 60lbs of pressure, they fold back up

K. Skontrianos: They wingspan is 110inches thats alittle more than 9 feet


Oh and for those of you who would think that our light is illeagal, its not, we followed the rules

Wayne C. 12-03-2003 05:42

thanks for the input- keep it coming

wc

Kyle 12-03-2003 06:25

wow, looks great, you guys,and girls, did a great job
I can wait to see to in action this weekend.
Good luck

-Kyle

JRT James 12-03-2003 10:52

Nice bot. hope to see you in annopolis.

Mr. Ivey 12-03-2003 11:23

You may have the arms nailed down, and what seems to be an impressive 6 wheel driving system, but can you put the money where your mouth is, and when push comes to shove, can you push back, or will you just have to self right??? Everything looks impressive though, and using the pnumatics, you should have plenty of pushing power.
ivey

Mike Schroeder 12-03-2003 11:36

well, this means nothing to most people, but it pushed me accross a floor, and i was trying to push back, and i am a 330+ lbs person :p

Serg 16-03-2003 17:10

Chesapeake Regionals, to all those in disbelief

I am with team 53, and our pit was next to team 25. Yes they did work on their robot while in the pits, but they did not replace an arm, not even scratch it. This 6 wheel robot was very fast, i think it was the nicest robot there. It looked cool. This bot has more power than most on stage, it defened their stack. Pushed all robots away, even on the ramp. Anyone can have a good bot, but I say that the driver/operator of team 25 knew what he was doing very well. He Controlled this thing like a dream. This thing is a tank.......

soezgg 16-03-2003 17:12

i agree, 25 was without a doubt one of the fastest, best controlled robots at annapolis

also top 5 in strength, nice drive.

Wayne C. 16-03-2003 17:18

at team 25 we have a proverb-

"that which doesn't kill us makes us stronger. NOTHING comes easy for team 25"

In the semis we were defeated by the eventual winners in a 1/1 decision. We had a failure in round one that was remedied in round two and a little bad luck(a wheel touching and 2 boxes short). No problem. The competition was great and the winners deserved their win.

But we fixed our machine now. And we are ready.....


SEE YOU ALL AT RUTGERS AND HOUSTON

thanks for the props Serg. We're just in this for the fun and friends.

WC ;)

Keith Chester 16-03-2003 17:33

And now our transmissions wont blow. Many matches in Annapolis was with only 2 of our 4 motors :D

Serg 16-03-2003 17:33

Unfortunately for me im not going to nationals. I wont see anyone till next years game, but till then good luck to all the teams.

Mike Schroeder 16-03-2003 17:42

as replic said many matches we ran 50%, apperently switching our gearbox from plastic to steel gears was really a bad idea, we had sooo much torque we kept destroying the transmissions on the drills, they really need to come up with better motor mounts next year

Serg 16-03-2003 17:47

It was still a very neat tranny thoug. Very well designed

Keith Chester 16-03-2003 17:48

The torque situation is fixed though, thankfully. It was a nightmare replacing the motors in our highschool, but moreso in Annapolis because we didn't have the luxury of time as we did before shipping.

tjrage_25 16-03-2003 18:50

The problem with our drive train was that the drills were mounted to absorb any forces from stopping too quickly with the drill brakes engaged. This turned into a problem when the mount was actually twisting the motors out of position, and dismounting the transmission. That is why we ended three matches with our drill tranys laying dead on the field. :( We fixed this, in quite a hurry I might add, by making the mounts rigid, now it works like a dream, and faster too!!! :) :D

It was a little hard to see it through the boxes, but we had a little too much speed. The bot actually got some air off of the ramp during autonomous mode and flew through the boxes! :D

And if anyone was wondering why our bot was cutting out during elimination rounds, it was because we had all four drive motors and the compressor running (voltage at sometimes was down to 6v). Anyone have the stats on how many amps the compressor draws so we can fix this problem?

Joe3 16-03-2003 19:26

Quote:

Originally posted by tjrage_25
The problem with our drive train was that the drills were mounted to absorb any forces from stopping too quickly with the drill brakes engaged. This turned into a problem when the mount was actually twisting the motors out of position, and dismounting the transmission. That is why we ended three matches with our drill tranys laying dead on the field. :( We fixed this, in quite a hurry I might add, by making the mounts rigid, now it works like a dream, and faster too!!! :) :D

It was a little hard to see it through the boxes, but we had a little too much speed. The bot actually got some air off of the ramp during autonomous mode and flew through the boxes! :D

And if anyone was wondering why our bot was cutting out during elimination rounds, it was because we had all four drive motors and the compressor running (voltage at sometimes was down to 6v). Anyone have the stats on how many amps the compressor draws so we can fix this problem?

We ran into this problem last year at VCU, before we tuned down our drive train. We were going fast enough to reach the goals in 1.8 seconds, but in those 1.8 seconds, we were destabalizing batteries.we tried to solve this by manually turning the compressor on and off using a switch on the conroll box, andturning off all things but the drive motors, but we couldn't get it to draw much less current. So in the end, we ended up just slowing down our drive.

tjrage_25 16-03-2003 19:41

There is a rule this year that allows teams to control the compressor via speed controller. I'm thinking about using that along with code that will analyze how fast the drive motors are running and adjust the current to the compressor accordingly.

If that doesn't work then we will disable the compressor during matches, our speed is way too important this year.

Serg 16-03-2003 20:44

If im not mistaken, you only use pneumatics for the grippers to stack and on those extruding bars on your arm. You really only need to charge up the compressor before a match and leave it off. Even the Van Door motor can be off, cause you dont really raise the arms to begin with, just autonomous. You guys didnt really attempt stacking that much. You guys are pretty smart, im sure you will come up with someting that works lol

Keith Chester 16-03-2003 20:51

Hmmmm.... you're right. Suggestion duly noted!
I guess we'll have to see how many times we can use wings and stackers in conjunction with only the storage cylinders.

tjrage_25 16-03-2003 21:00

We thought of that before, we only can open and close the arms 3 times with the 2 fully charged tanks and no compressor. We need 1 for autonomous mode, and if we have to plow the oppontents boxes we may need more. And yes the grippers are using pneumatics, but chances are that we are going to change them to something more sutable to our strategy.

Mike Schroeder 16-03-2003 22:40

Quote:

Originally posted by Serg
Even the Van Door motor can be off, cause you dont really raise the arms to begin with, just autonomous.


acctually, we always keep the van door motor on, to keep it in the position its in
if we dont, it will slowly fall

tjrage_25 16-03-2003 22:44

Not true Mike, if the arm is all the way in the down position it is turned off.

Serg 16-03-2003 23:41

See we on the other hand have that problem. Our arm stays 90 degreez to the ground, therefore, the van door is always running keeping it up. What rage_25 just said is what i thought. you guys always fold your arms down, i believed that you would disable the van door from holding it up.

We have a compressor switch, you guys should put one on too. We always left it on, but you guys can have it off and let it pump up again then turn it off. Believe me, you all didnt use pneumatics that much right?? just in Autonomous, and what an automomous that it. The quickest by far!!

The Lucas 17-03-2003 00:20

Couple suggestions
 
First be thankful that this problem hasn't cause your Robot Controller to enter Safe Mode during the voltage drop (when the voltage is lower than radio needed voltage). That happened to MOEhawk at VCU about every match until we re-geared it. The only way to get out of safe mode is to reset.

If you need to run your compressor, run it only when your drive system is in neutral, such as after autonomous routine has executed (takes like 5 sec for your fast bot) or when the joystick is in the deadzone (just add the compressor to the deadzone code). The compressor is notorious for surging at turn on (lil' MOE blows a 20A fuse at every event). As tjrage_25 mentioned before the compressor can run on a speed controller so u can implement a digital filter to bring it up to speed, avoiding the surge. Also, make sure the pressure switch is not bouncing on u turning it on and off rapidly. We always put a delay before we turn off so the pressure will not instantly drop below 120 psi after turn off.

For your Van Door Motor powered arms u might want to try the dynamic braking feature of the Victor speed controllers. Pull off (or set to AB) the jumper on the Victor (normally set to BC for coast) to select dynamic breaking mode. These settings only affect the behavior of the speed controller in neutral (PWM 127). Dynamic braking works by connecting the 2 leads of the motor together, essentially causing there to be no voltage across the motor thus no movement (think of it as forced movement on the motor generating a voltage that is fed back into the motor to drive it the opposite direction of the motion). This dynamic brake is not 100% efficient (mostly due to wire resistance), but depending on the force needed to backdrive your gearing and the moment of inertia of the arm it may work. So try the dynamic braking, since it only requires a simple jumper and code change, and it may solve your current draw problem by not running the van door constantly (also save u from van door burnout).

I like your proverb
"that which doesn't kill us makes us stronger. NOTHING comes easy for team 25"

Here is a proverb I came up with while fixing MOEhawk's wings
"He who takes everything from everybody is going to lose an arm in the process"

Good Luck. See you in Houston and probably about 5 invitationals after that.

Keith Chester 17-03-2003 15:08

thanks for the help Lucas and Serg. You guys were great at Annapolis.

As for seeing Geronimoe in competition again, I look forward to it, as we've never played against eachother.

Wayne C. 17-03-2003 16:27

there's always the off season....

Ashley Weed 17-03-2003 16:29

25 - just wanted to congratualte you on an AWESOME robot... your speed and capabitilities on the ramp were amazing. Thanks for allowing us to support your team at Annapolis. Best of luck to you in the 2003 games, and looking forward to meeting up with you again soon.

Serg 17-03-2003 17:23

it wasnt a problem man, just from being pitted next to you guys and staring at that drive train for hours, I learned a lot. I could probally put it together if it broke from looking at it so long.

Keith Chester 17-03-2003 19:05

The drive train itself is an easy 5 minute exercise to disassemble and reassemble. We did that in hopes of easy repairs.

Unfortunately, the arm being built ontop of that added an hour to that reassamble time!

Alexander McGee 18-03-2003 19:12

Great Job
 
It pleases me to see a robot that will compliment orus well in competition. Team 68 can't wait to see you. Keep up the good work guys.

Dan-o 18-03-2003 19:31

Impressive...
 
I would just like to tell you guys how impressed I am with your robot. You were very porweful and fast, however, there was one turn off about your driving. It seemed that you guys ran into everyone a lot, including your partner. At one time, you guys almost single handedly flipped your partner. I'm guessing this was just an accident. Either way, you had a great bot and I feel we would make an unbeatable pair.

Keith Chester 18-03-2003 20:08

Yea, it's a hard bot to drive. Even then, it's too quick to correct yourself before you're far away. Keep in mind as well- it's hard for us to see our partner sometimes becuase of the ramp and boxes (short driver).

Goober65 18-03-2003 23:03

Keep your mouth shut Replic, you have no idea what ur talking about when u say its because im short, height has nothing to do with it, im about 5' 8" which is average, and im sure if u were driving ud run into the same problems...it wasnt a matter of height, it was me running around trying to do everything by myself, which i learned was a big mistake.

Mike Schroeder 18-03-2003 23:11

Replic, while i too will never understand the complexity of driving our robot, This year our driver has an incredibly difficult task of having to do everything him self, i would please ask that somthing that you said (about goober being short) not be said on here, it appernetly upset him, and is not the rest of the internets concern.


Dan-o 19-03-2003 15:00

Be nice
 
Neither Replic, nor Goober should have posted what they did. Please be nice to eachother when talking where everyone can see it (And for that matter... Anywhere). I am a fellow driver who understands the complexities of driving a student built 130 lb machine on the opposite side of the field. Also, everyone makes mistakes, (I'm the guy who flipped GeroniMOE in the finals that ultimately cost us the regional). Keep your head up, it's only your first regional (for this year). Good luck to you guys at your future competitions.

ssjcell 19-03-2003 18:33

both you guys should stop bashing each other , im ean you on the same team show some of that stuff that you want your grandma to watch i mean it really hurts me to see such type of behavior, ARE WE BATTLEBOTS! no were the ones who make it so that the things that move complete a goal, not kill each other, although sometimes ours does that.....
but more importantly, $@#$@#$@#$@# underclassman need to learn their place, replic, your a sophomore , were seniors. obey us and say nothing else about it, when were gone youll have your time to boss others around, but for now do as we say and smile. so stop bad mouthing our driver,

DIVINITY!

Wayne C. 19-03-2003 18:48

BE GOOOOD!


Goober did a great job driving and will do even better at Rutgers.

ssjcell 19-03-2003 19:18

Quote:

Originally posted by Wayne C.
BE GOOOOD!



ya you'd like that wouldnt you cokeley

Wayne C. 24-03-2003 11:44

be sure to wave bye bye to the plane as it departs for Texas....

ssjcell 24-03-2003 15:36

ill duct tape me to that plane if i have to

Serg 24-03-2003 19:43

too bad our school board didnt let us go to nationals........ I guess we wont see team 25 til next years chesapeake regionals.

Keith Chester 24-03-2003 19:59

Quote:

Originally posted by Serg
too bad our school board didnt let us go to nationals........ I guess we wont see team 25 til next years chesapeake regionals.
Good chance we won't be going.

ssjcell 24-03-2003 20:16

whut ch'u talkin bout, chester?

Pin Man 30-03-2003 18:26

nice bot

Keith Chester 30-03-2003 20:46

ty. ty very much.

Gope 02-04-2003 23:27

Looks great! Can i get a run down?

Drive motors, tansmision style, wingspan, gear ratios, top speed, shift or no shift, auto-mode time, awards won at regionals, and maybe even a list of matches at regionals?

Mike Schroeder 03-04-2003 00:49

Drive Motors= 2 Cimms, and 2 Drill motors
Transmission= 1 speed gear box transmission witha 4:1 gear ratio
wingspan=95 inches
Gear Ratio=4:1
Top Speed- fast. and what the heck was that (about 15-17 fps)
No Shift
AutoMode Time= 3.2 seconds
Awards = Judges Award for consistanly being highly ranked on every judges list for every other award -- MD Cheasapeake Regional

ssjcell 03-04-2003 20:25

13 ft a sec


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