Need inspiration on how to harvest or pick up frisbees

[Ravage457]

Hello and good morning chief delphi community.

Well ill admit this year is a real hard game, but for me it would be on how to harvest or pick up frisbee from the ground. Pertty much need some advice. Ive done it where u have to pick up a ball, but a frisbee, well it looks like it would be tricky.

I just need some advice on how the community would do it. Im have no clue. Or maybe im just thinking to much into it, but any advice would be good

[ttldomination]

Well ill admit this year is a real hard game, but for me it would be on how to harvest or pick up frisbee from the ground. Pertty much need some advice. Ive done it where u have to pick up a ball, but a frisbee, well it looks like it would be tricky.

While a ball and a frisbee are fundamentally different, I don't see the ways in which you pick them being very different at all. Try prototyping similar methods (a ramp with a roller out front, etc) and seeing if that works.

As far as this design approach in general, the validity of ground pick up as been brought up again. With that being said, if you're having trouble with this, it might be a good idea to ensure that your robot can do some good from the feeder station.

- Sunny G.

[ptkunapuli478]

What our team has brainstormed as potential intake mechanisms basically came down to using a roller somewhere between 1 5/8" and 2" off the ground (a frisbee is 1 5/8" tall) in combination with a polycarbonate sheet underneath the roller to grab the underside of the frisbee. Our prototype for an intake mechanism basically involves a 3/8" shaft with Banebot wheels (with blue polyurethane). They get amazing traction on the frisbees, so try them out. If you have any questions, feel free to ask

[CalTran]

While I too had the same idea, the problem with utilizing a floor roller to a sheet of material is that the floor isn't flat. Around each corner of the pyramid is the little lip. A polycarb sheet may get caught and break; aluminum thin enough for a Frisbee to pass over would bend.

[Ravage457]

What our team has brainstormed as potential intake mechanisms basically came down to using a roller somewhere between 1 5/8" and 2" off the ground (a frisbee is 1 5/8" tall) in combination with a polycarbonate sheet underneath the roller to grab the underside of the frisbee. Our prototype for an intake mechanism basically involves a 3/8" shaft with Banebot wheels (with blue polyurethane). They get amazing traction on the frisbees, so try them out. If you have any questions, feel free to ask

which are the banebot wheels, ive heardof the banebot motors, but never of the wheel, it sounds pertty intresting, do you know where i can see them?

[MrForbes]

which are the banebot wheels, ive heardof the banebot motors, but never of the wheel, it sounds pertty intresting, do you know where i can see them?

banebots.com

Also look for the 842 post about their early prototyping for the pickup mechanism

http://www.youtube.com/watch?v=XFoOrSBaF9M

is the video that was linked in the post.

[AlexD744]

What our team has brainstormed as potential intake mechanisms basically came down to using a roller somewhere between 1 5/8" and 2" off the ground (a frisbee is 1 5/8" tall) in combination with a polycarbonate sheet underneath the roller to grab the underside of the frisbee. Our prototype for an intake mechanism basically involves a 3/8" shaft with Banebot wheels (with blue polyurethane). They get amazing traction on the frisbees, so try them out. If you have any questions, feel free to ask

According to Team Update 1 (http://frc-manual.usfirst.org/Updates/0#term 24), the disks are 1.4" tall, not 1.625" (1 5/8") tall. Please correct me if I am mistaken.

[slijin]

According to Team Update 1 (http://frc-manual.usfirst.org/Updates/0#term 24), the disks are 1.4" tall, not 1.625" (1 5/8") tall. Please correct me if I am mistaken.

While largely true, please remember that all figures are nominal and may vary slightly between individual game pieces.

Granted, seeing as how these guys can survive getting crunched under an Outback multiple times, durability isn't as much a concern as it was last year - but building for tolerance is still always important.

[MelodyPond]

While I too had the same idea, the problem with utilizing a floor roller to a sheet of material is that the floor isn't flat. Around each corner of the pyramid is the little lip. A polycarb sheet may get caught and break; aluminum thin enough for a Frisbee to pass over would bend.

What if the pick up system was spring loaded? So it could bounce over the lip. And if you rolled the metal over so that is was rounded on the end, straight edges wouldn't get caught on the carpet. We haven't tried prototyping this yet, so I'm not sure how it will work outside of theory.