can grabbers fastest?
 

27 503 548 1678 118 1114 3683 1676 329 987 3310 610 2848 330 2056 4976 1305 2852 624 303 1986 1519 1711 195 319 971 67 33 ??????????????
who is bringing some????
who will be the fastest???

Re: can grabbers fastest?
 

Assuming you mean in auto...
I've been told 254's is under half a second. Sounds pretty fast to me. The fastest I have seen is 610's where it completes its job in under 2 seconds.

Re: can grabbers fastest?
 

You didn't see 987 in Las Vegas?

https://www.youtube.com/watch?v=MevxhUgNAk0

Re: can grabbers fastest?
 

How fast was that? I couldn't tell due to slow motion.

Re: can grabbers fastest?
 

Depending on when you consider them 'grabbed,' it's about 10 seconds in that 400fps video. Converting that to 30fps 'real time' puts that at under 1 second.

Re: can grabbers fastest?
 

Steven (my son, who posted the video) figured it was around a quarter of a second. Seems there are several ways to get to the can in that time, so we're going to need to be pretty sharp eyed to see what's happening during the beginning of the matches at Champs. Of course, it's easy to see which way the cans fly after they've been grabbed.

Re: can grabbers fastest?
 

It was indeed about a quarter second...

Re: can grabbers fastest?
 

A quarter second is so last month...

Re: can grabbers fastest?
 

we've got our mechanism, but no robot to test it on. The arms can deploy under 0.4 second, so i'm pretty confident we'll join those great teams :D

Re: can grabbers fastest?
 

Ours resembles our shooter from last year more than what we had at the beginning of the season now...

Re: can grabbers fastest?
 

It will be fun to see how fast they can go! I think lots of teams are working on mechanisms and not revealing them, it should lead to some entertaining match starts. My favorite quote so far this year was when we weighed a bit of carbon tube that was to be used as a small support structure: "Ooh, 0.6 grams, that's more than I'd like."

I'm hoping to run around to different divisions and shoot some slow motion footage of the fastest grabbers. Might be tricky with so many divisions and teams though.

Re: can grabbers fastest?
 

What are you using to actuate your grabbers, pneumatics?

Re: can grabbers fastest?
 

I expect the can grabbing gizmos to be stunning in their performance levels, if what we've been playing with is any indication.

Re: can grabbers fastest?
 

4 CIMs and too much speargun tubing.

Re: can grabbers fastest?
 

Wow that is quite a bit of power, do you just stall the motors to keep it from deploying, or do you have some sort of release? Thanks for the reply!

Re: can grabbers fastest?
 

Out of curiosity, why CIMS? There are motors with higher RPM out there and you don't really need the torque...

EDIT: Did some research and remembered that you guys make your own gearboxes (I think) so that makes more sense now

Re: can grabbers fastest?
 

When you're using as much surgical tubing as possible, you need a lot of power to pull that thing back.

EDIT: DPTO

Re: can grabbers fastest?
 

That, and even ignoring the tubing, angular acceleration = torque / inertia. If you can add torque without adding inertia it will speed it up. The more important number than RPM or torque is power though, which CIMs have a whole lot of.

Also we use the 4 CIMs to drive the robot around after autonomous.

Re: can grabbers fastest?
 

https://www.youtube.com/watch?v=M5YpXlQ5ia8 (top left in video) 329 was comfortably under 400ms in week 4 and have made some tweaks to that speed

Re: can grabbers fastest?
 

Yes, I can attest to this. 329 was a steal of a pick, to think it's even quicker now is astonishing!

Good luck in Carver! :)

Re: can grabbers fastest?
 

Not sure if this would be feasible, but in 2011 a team set up a minibot speed test. You would bring your minibot to their pit and activate in on high speed footage. They had a ranked list of teams with the fastest minibots shown. This year I would be pretty cool if one team somehow watched the practice fields and listed off times.

Re: can grabbers fastest?
 

Homer bias, but 177 was pretty fast at Hartfordhttps://youtu.be/BMK9L3OhdNo

Re: can grabbers fastest?
 

What were you using at MSC?

Re: can grabbers fastest?
 

Just 4 CIMs. Same as Livonia, Waterford, Standish, etc

Re: can grabbers fastest?
 

Although that would be neat I don't think any of the fastest teams would be interested in doing it until they either get knocked out, or the event ends. Most teams that are racing don't want the teams they are racing to know how fast they are.

I'll be recording as many teams as I can though so I may be able to post some times after CMP.

Re: can grabbers fastest?
 

Here are two from 3824

One is 3D printed with a stand-alone pneumatic system for an alliance partner
https://m.youtube.com/watch?v=l5J21aIJA-I

https://m.youtube.com/watch?v=YynT5unWQAU

The other is very light, 0.04 lbs. Carbon fiber wire.
https://m.youtube.com/watch?v=4AUfgudxsFo

The printed one took 30 minutes to print both arms and the base. We've got both glass fiber (more pliable) and carbon fiber (stiff)