How to pick up a frisbee

[kuraikou]

Originally Posted by z_beeblebrox

Perhaps have a toilet plunger end on a pneumatic arm come down and stick on the disc and then pull it back up. On the way up, the disc would hit a mechanical stop and fall of the plunger into a ramp or hopper.

http://www.youtube.com/watch?v=t8tEbK8S7-8

a cool plunger pickup system

[Joon Park]

Originally Posted by Wildcats1378

I think that picking up the frisbees is going to be a waste of time. There's a pretty small number sitting on the field, and the main way to get most of the frisbee's is through the feeding station.

Although I agree that we're going to see the feeding slots used more than ever in the past few years, picking up discs from the field will be a HUGE advantage, because it's actually something that not all the teams will be able to do, nevertheless do it well. There will be quite a few discs lying around the field from missed shots, I imagine.

I think it's quite possible to build a launcher that will toss discs equally well when they're upside down as right side up, or near enough that there isn't a noticeable difference at the type of ranges you might see in this game. I've heard a human throw type called the "Hammer" or the "Tomahawk"; it goes from vertical to inverted in flight and stays inverted. It also travels a fair ways, if thrown correctly.

I addressed this in another post, but if you're planning to throw the disc with any resemblance of accuracy over any distance greater than, say, 3ft, you're going to have to do it the way it was intended: right side up, and with spin. I guarantee you we will see 0 robots that emulate the human throw called the hammer. A hammer is hard for a human, it'd be even harder for a robot. (Source: ultimate player)

[Rishabhgadi]

Originally Posted by z_beeblebrox

Perhaps have a toilet plunger end on a pneumatic arm come down and stick on the disc and then pull it back up. On the way up, the disc would hit a mechanical stop and fall of the plunger into a ramp or hopper.

Or have an arm, so that you can extend and just release?

[ttldomination]

Originally Posted by Joon Park

I addressed this in another post, but if you're planning to throw the disc with any resemblance of accuracy over any distance greater than, say, 3ft, you're going to have to do it the way it was intended: right side up, and with spin. I guarantee you we will see 0 robots that emulate the human throw called the hammer. A hammer is hard for a human, it'd be even harder for a robot. (Source: ultimate player)

http://www.youtube.com/watch?feature...r6dkY8#t=76 s

Seems to me that if you got it going good enough, an upside down discs does nearly as well.

- Sunny G.

[pfreivald]

Originally Posted by Joon Park

I addressed this in another post, but if you're planning to throw the disc with any resemblance of accuracy over any distance greater than, say, 3ft, you're going to have to do it the way it was intended: right side up, and with spin. I guarantee you we will see 0 robots that emulate the human throw called the hammer. A hammer is hard for a human, it'd be even harder for a robot. (Source: ultimate player)

I'm going to go out on a limb here and say you're wrong on this point.

[gabrielau23]

Originally Posted by Joon Park

Although I agree that we're going to see the feeding slots used more than ever in the past few years, picking up discs from the field will be a HUGE advantage, because it's actually something that not all the teams will be able to do, nevertheless do it well. There will be quite a few discs lying around the field from missed shots, I imagine.



I addressed this in another post, but if you're planning to throw the disc with any resemblance of accuracy over any distance greater than, say, 3ft, you're going to have to do it the way it was intended: right side up, and with spin. I guarantee you we will see 0 robots that emulate the human throw called the hammer. A hammer is hard for a human, it'd be even harder for a robot. (Source: ultimate player)

Robot in 3 Days would like to disagree with you about the upside down part:
http://www.youtube.com/watch?v=iyE4Ir6dkY8

[Kellen Hill]

I'm not sure that picking up discs off the floor will be very important, but this is something I hope to see on at least a few robots.

http://www.diginfo.tv/v/11-0121-r-en.php

[AdamHeard]

Originally Posted by pfreivald

I'm going to go out on a limb here and say you're wrong on this point.

I don't see them making them in any sort of goal, and there is no indication of precision whatsoever.

Don't assume this video proves anything.

[Kpchem]

Originally Posted by hill

I'm not sure that picking up discs off the floor will be very important...

The one big advantage I see to floor loading discs is that if you miss a shot, you can pick it up again and fire immediately, instead of having to cross the field to reload. I feel that for some teams, this will prove to be a big factor in their performance, because they can score every disc around them.

[z_beeblebrox]

From the accuracy of prototypes and the large size of the goals, I don't think that good teams are going to be missing many shots. In addition, as I learned last year, just the driving to pick up game pieces requires great precision and can be time consuming. It seems easier to zip back to your driver station and quickly load 4 more from that hard-to-deplete supply.

[falconmaster]

Originally Posted by hill

I'm not sure that picking up discs off the floor will be very important, but this is something I hope to see on at least a few robots.

http://www.diginfo.tv/v/11-0121-r-en.php

That was just awesome! Thanks

[ksafin]

Yeah, our team initially planned to do a mechanism to pick up discs from the floor but..

Guys lets be honest.. each team on your alliance gets 17 discs. I think in the 1:30 tele-op (not including end game) it's very reasonable that you'd be able to traverse the field to your hopper, get filled, go back, score, and repeat to get pretty much just those 17 discs in (if even).

In other words, don't worry about picking up discs. Go get filled because it takes attention off of picking up and elevators and focuses on filling some hopper on your robot that'll go straight into a shooter. In 1:30, I can't see getting more than 17 discs across anyway. If you do, that's excellent, just be happy with that!

[McGurky]

To all teams reading this, make sure that you test any prototype on carpet similar to that being used on the official field.

A design that might work on your shop floor could very well fail on carpet.

In addition, I think teams should look at how many shots missed the hoops last year. Expect about that many disks to miss their target and end up on the ground.

[MrTechCenter]

Sure it's much easier to go across the field to your alliance's feeding station and grab four discs, but think about it. After autonomous mode, you'd have 3 robots fighting for discs at the alliance feeding station. Sure there's enough slots for all three to be filled at the same time, but realistically, all three would not be fed at the same time, as the corner is very small and can barely fit all three robots there assuming that they are average sized. Plus, you have to worry about d-bots getting in your way and defending your feeding station. If you can pick up discs from the ground quick enough, it would be a HUGE advantage to you, and it would be beneficial during autonomous too, because then you can pick up discs from the ground and shoot them during auton for additional points (after you've shot your preloaded discs). And as for there being a lack of discs on the ground, the goals are fairly large but with the amount of defense that's possible, I can see a LOT of missed shots when a d-bot knocks a scoring bot off of alignment. We saw this last year with fender-shooters and d-bots.

[Garten Haeska]

When I first saw the animation I thought that it would be hard to pick them up off the ground, then when I saw that we would potentially be suspended 90in. In the air, I quickly said, good shooter, good arm, no pick up. Yes if your alliance gets 17 frisbees each that means why pick up when you can just recieve. Just my honest opinion. Just remember this year, the lower the weight the easier the climb.