2587 - 4-bar tube stacker
Houston VEX - Champion
Picks up 10 tubes
3.5 sec. wall-to-wall field speed
“one of the fastest-strongest drivetrains ever seen in VEX” - random spectator quote
2587d - 4-bar rollers
Oklahoma VEX - Champion , Robot Skills , Prog Skills
Descores at impressive speeds
3.8 sec. wall-to-wall field speed
90 pt. skills scores
2587z - 4-bar standard claw
Austin VEX - Excellence Award
4.0 sec. wall-to-wall field speed
85 skills scores
2587 is featured below:
instead of posting the “wall-wall” speed, why dont you post the drive ratios and wheel size?
because it may differ wall-wall besed on battery level and ect
but if you know the ratios, you can find the fps (feet per second) using the speed chart https://vexforum.com/gallery/showimage.php?i=72&catid=favorites
I think wall-to-wall accurately shows true speed. Many of these robots run the same ratio but weight/friction/battery definitely affects the performance of these top speeds.
We tend not to use the speed chart because since we pay a lot of attention to friction and weight distribution in our drives, they generally move faster than the speed chart. As of last year, 2587D got the drive to move more than 0.5 a seconds faster than the chart; I can’t imagine the difference with the new motors. Here are the ratios and stats:
The reason we post the wall to wall speeds is because the load on the motors change the robot performance a lot. If two robots are geared 2:1 with 4 in wheels it doesn’t mean they will post the same times wall to wall. You also have to have the same friction in the drive train and robot weight. The motors themselves all don’t produce the same amount of power or have the same free speed rpm, they are close but not perfect.
The wall to wall times is how we benchmark our robots.
The gear ratio’s are nice to know however.
2587 has 4 393 motors and a 2:1 gear ratio
2587D is using 4 393 motors and a 3:2 gear ratio
2587Z is using 4 393 motors and I believe a 3:2 ratio as well.
All robots are using some combination of the 4in traction and omni wheels and are geared using high strength chain.
It’s a pretty long story. Originally both 2587D drove with 4 269s so there was no legal way to do an internal. Then 2587D and 2587Z switched to 2 393s and 2 269s and there’s no external ratio for a 269 to match an internally geared up 393. And just recently both of them switched to a full 393 ratio.
Red - 2587D, 5678
Blue - 2587Z, 2587S (not going to worlds)
2587D is the roller/sucker arm on the red alliance side. It has all the batman decorations on it.
5678 is the claw robot on the red alliance
2587Z is the pincher/claw robot on the blue alliance side
2587S is the blue plunger/needle robot on the blue alliance
Team History 2587Z:
Autonomous Winners Houston 2010
Autonomous Winners at Austin 2010
Team History of 2587 D:
Undefeated in qualifiers at Houston 2010
Excellence Award at Houston 2010
Finalist at Galena Park 2010
Division Finalist at Worlds 2010
Think Award Finalist at Worlds 2010
Undefeated Winners at Oklahoma 2011
Autonomous Winners at Oklahoma 2011
Driver Skills Winners at Oklahoma 2011
