I was wondering how many teams can shoot out the flipped disks or if it happens are you stuck? If you can get them out how did your team do it?
We bent some plastic, attached it to our pusher and put double sided tape on the plastic so the tackiness of the tape will prevent the pusher from lifting the disk.
Why reject them when they’re good discs?! We just shoot em. No difference to us.
Our shooter doesn’t shoot them accurately, but it does eject them. They don’t jam up our shooter at all, so if we accidentally pick them up- oh well!
Our shooter does better when the discs are upside-down: have to make sure our feeders remember to load them like that.
We didn’t think so, but according to our match videos it manages to pop them out eventually all by itself. As soon as we get it out of the bag we’re going to try to figure how the heck that happens so we can do it on purpose if needed…
1706 is able to flip them, or completely eject them, depending on how many frisbees are in our hopper. We have 2 pneumatic cylinders that eject it-see also spy movies-and it goes flying out.
We are able to flip them automatically from our harvester, no code needed, it’s simply and very effective.
we spent a lot of time making sure our discs don’t flip upside down when feeding. On the rare chance we get an upside down disc, we added a 2nd pneumatic trigger with a larger profile to flick out the upside down disc.
How does this black magic work?
Same, with us upside down shoots better mostly since it grips more on the shooterwheels.
We-re able to shoot upsidedown frisbees b/c of our cam design(We actually planned it for just in case)
We have a device that flips it over.
Took us a while, but we added a cut-down clevis to the end of our pneumatic chambering cylinder, so upside-down discs come out well enough, but only at low-goal height. It’s a nice KISS solution and I hope it works for others with the same problem. Most of the time it’s not worth it to us to score them in the Low Goal though, so we just eject and move on.
We have a trap door in the bottom door of the shooter bucket that we can release when we have an upside down disk. An unintended consequence of abandoning floor pickup is that we can use the elevator chute for ejection.
We had a lot of trouble with that our first district and a half. Halfway through Detroit though we added a clear plastic (lexan?) sheet in between our hangers to help block cross-courters, and we found that it extended down in such a way that unless our loader intentionally fed them upside down, it was almost impossible for them to flip. Worked wonders for the rest of the competition!
Same here…but our discs fly together…
I was going to start a thread about upside-down discs, but remembered to search. Then I found this one. And decided to revive it.
Other than the teams mentioned, can you shoot discs upside down? Do you have a mechanism to flip them around/eject them?
My team can’t shoot them upside down and doesn’t have a way to get them out. We can try flipping the robot to get them out, but it hasn’t worked if my memory serves me correctly. (happens within the first minute of teleop)
Also, could you describe why it doesn’t shoot correctly? Ours has something to do with the mechanism that pushes our discs into our wheel, it can’t catch the edge of it properly.
Upside-down discs jam our shooter-loader piston and we have no way to eject them. Our floor pickup, however, will not pick them up.
Our shooter is incompatible with upside-down discs. Our feeding mechanism, a shark fin shape actuated by a pneumatic cylinder, is designed to stay low and catch the bottom edge of discs that it feeds forward while also being able to slide backward when the next discs falls into place without snagging them. Unfortunately, its low profile means that it doesn’t catch the rounded edge of upside-down discs and instead slides right under them.
After spending a season watching our offensive capabilities end during matches because of upside-down discs in our hopper we finally decided to add a flipper during IRI. We finished adding a 2 inch stroke pneumatic cylinder beneath our shooter with 2 matches to go. We inadvertently mounted the cylinder at a slight enough angle that it doesn’t just push the discs up but, instead, flips them over.
We never used it during a match.
At one point in time, our floor pickup could pick up upside down disks. Since then its been changed and somewhere along the lines it started rejecting them. However, once they are in, we have no problems jamming (because we don’t stack frisbees, we store them in a line) and can shoot them exactly the same way as normal frisbees. We also mechanically have the ability to differentiate between right side up and upside down, but we never put it to use in code. All of this is possible because of a flange sticking out of the middle of our frisbee path which forces regular disks to be flat on the floor and upside down ones to be pushed up against the ceiling.
Since we use an air cylinder shaft to catch the lip of the disc to send it on its way we, at first, could not eject an inverted disc.
After BMR I came up with the L.I.F.E. wedge.
Little
Inverted
Frisbee
Ejector
It pushes the inverted disc into the shooting wheel and ejects it. The disc doesn’t fly far but it comes out screaming. At CRR we ejected an inverted disc at out opponents plexiglas and scared the #@*% out of them 