04-02-2013 21:27

Ty Tremblay

Re: pic: FRC488 Mock Up

That looks awesome. What motors are you running on your shooter? What kind of range are you getting?

Did you find that the flat surface for the frisbees helped?

05-02-2013 00:48

AllenGregoryIV

Re: pic: FRC488 Mock Up

I like this setup. The roller of banebots wheels is awesome, did you not find any other roller material that would work? It seems like an expensive solution.

I love what you all did with your chassis. We are doing under bumper collection as well.

Thanks for sharing.

05-02-2013 10:06

coldfusion1279

Re: pic: FRC488 Mock Up

Those banebot wheels are great in contact with frisbees, but too many for us to use in one spot. Is that a pick-up mechanism? What motor are you using and what's the ratio you found to work?

Clean design, looks great!

05-02-2013 11:00

Mr B

Re: pic: FRC488 Mock Up

Wow, what a beautifully simple, elegant, and functional design. Well done! I can't wait to see it in action.

05-02-2013 12:31

waddell

Re: pic: FRC488 Mock Up

Chassis looks great as usual, Madison.

Did you see an improvement on your shooter when running a third motor/wheel on the opposite side of the first two?

05-02-2013 12:41

JB987

Re: pic: FRC488 Mock Up

I believe the third wheel you see is on the human loader platform below the shooter level...

05-02-2013 13:47

Madison

Re: pic: FRC488 Mock Up

The roller has about 22 wheels on it -- so about $50 worth of wheels. I'm happy to spend a bit of money to save time in the shop and this solution was easier than making a roller of our own. We didn't try anything else -- this worked well from the start.

The green wheels are driven by an RS550 through a 3:1 Versaplanetary gearbox; the orange, a BAG motor through a 1:1 gearbox. The range isn't as good as I'd like to see, but it is good enough for our strategy. It is effective between 15' and 20'. We didn't test a shooter without some kind of flat surface as its base. The flat sheet -- delrin, in this case -- is something we can easily laser cut in our shop. Anything involving extrusion is doable but becomes more of a headache, so I avoid it where I can. It may be difficult to see because we prototyped in polycarbonate rather than delrin, but the entire structure is assembled with a slot and tab system that is reinforced in a few spots by extrusion.

Here's a video of some our calibration testing: http://www.youtube.com/watch?v=aFyaWjJ9aPc

And another of the roller loading frisbees: http://www.youtube.com/watch?v=iUDMAEOU09I

Thanks! It's probably not as simple as it can be -- there's a lot still missing -- but it's MUCH simpler than where we started a few weeks ago.

Actually, that's just perspective playing a bit of a trick on you. The assembly you're seeing (with the wheel on the opposite side) is actually our prototype shooter. We removed one its motors to put on the prototype robot since I didn't order enough 3:1 gear kits from Vex.