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-   -   pic: Custom Wheels (http://www.chiefdelphi.com/forums/showthread.php?t=73386)

=Martin=Taylor= 31-01-2009 23:34
pic: Custom Wheels
 

Kyle Love 31-01-2009 23:34
Re: pic: Custom Wheels
 
Nice shooter wheels.

RyanN 31-01-2009 23:35
Re: pic: Custom Wheels
 
What do I think?

Umm... bad year to decide to make your own wheels...

Oops.... You mean 'those' wheels. They look aluminumy... Someone spent a lot of time either making those or watching them be made assuming you did it on a lathe.

Woodworker88 01-02-2009 00:26
Re: pic: Custom Wheels
 
Quote:
Originally Posted by RyanN (Post 812020)
Oops.... You mean 'those' wheels. They look aluminumy... Someone spent a lot of time either making those or watching them be made assuming you did it on a lathe.
Those toolpaths look like it was done on a CNC mill or rotary table. Nice work, you guys.

=Martin=Taylor= 01-02-2009 00:37
Re: pic: Custom Wheels
 
Quote:
Originally Posted by Woodworker88 (Post 812045)
Those toolpaths look like it was done on a CNC mill or rotary table. Nice work, you guys.
Our team doesn't have the milling abilities to do these, so we had a sponsor mill them out. Then our students finished them up on the lathe.

They are by far the most complex/coolest looking parts we’ve ever made!

To give you some proportions they are 6" OD.

They are actually fly-wheels/roller-hubs. Hopefully they'll allow us to fire vast quantities of balls very quickly without losing speed and range.

R.C. 01-02-2009 01:37
Re: pic: Custom Wheels
 
Quote:
Originally Posted by Hachiban VIII (Post 812051)
Our team doesn't have the milling abilities to do these, so we had a sponsor mill them out. Then our students finished them up on the lathe.

They are by far the most complex/coolest looking parts we’ve ever made!

To give you some proportions they are 6" OD.

They are actually fly-wheels/roller-hubs. Hopefully they'll allow us to fire vast quantities of balls very quickly without losing speed and range.
And i thought your guys 07 arm was a beast. I can't wait to see that crazy shooter. Have a great build season and see you at DAVIS. :D

amariealbrecht 01-02-2009 11:53
Re: pic: Custom Wheels
 
wow your shooter is going to be great! I hope everything continues to go well for you this year and good luck at all your competitions!

MrForbes 01-02-2009 12:27
Re: pic: Custom Wheels
 
Quote:
Originally Posted by Hachiban VIII (Post 812051)
They are actually fly-wheels/roller-hubs. Hopefully they'll allow us to fire vast quantities of balls very quickly without losing speed and range.
We have a very low inertia shooter driven by one CIM with about 1.5 reduction, and we don't have any trouble with shooter speed dropping when it shoots out 5 balls in rapid succession on full speed. We do notice that the motor slows down a bit when we have the speed reduced for shorter range, but I think if we get a speed sensor on the shooter wheel and set up a feedback loop to keep speed constant, it will be fine.

Very nice shooter wheels! what's the weight?

=Martin=Taylor= 01-02-2009 23:41
Re: pic: Custom Wheels
 
Quote:
Originally Posted by squirrel (Post 812212)
We have a very low inertia shooter driven by one CIM with about 1.5 reduction, and we don't have any trouble with shooter speed dropping when it shoots out 5 balls in rapid succession on full speed. We do notice that the motor slows down a bit when we have the speed reduced for shorter range, but I think if we get a speed sensor on the shooter wheel and set up a feedback loop to keep speed constant, it will be fine.

Very nice shooter wheels! what's the weight?
You appear to have misunderstood me when I said "vast quantities of balls very quickly." Think 10 balls in a fraction of a second :D

We actually modeled our shooter using rotational momentum, and imagined that the balls being fired were "collisions" slowing the wheel down. Adding the flywheels greatly improved consistency. Recharge went from about 1 second down to like .2 seconds. Of course we'll have to see about my math :rolleyes:

They weigh 2.5 lbs. each. We know how much the final bot will weigh from CAD and this is a perfectly acceptable amount for us.

MrForbes 01-02-2009 23:50
Re: pic: Custom Wheels
 
Sounds neat! We have trouble getting more than 5 balls per second into the shooter....shooter speed is not the limiting factor ;)

I wonder if there's going to be a fps limit this year like in 2006?

Andy L 02-02-2009 00:22
Re: pic: Custom Wheels
 
Quote:
Originally Posted by Hachiban VIII (Post 812525)
You appear to have misunderstood me when I said "vast quantities of balls very quickly." Think 10 balls in a fraction of a second :D

We actually modeled our shooter using rotational momentum, and imagined that the balls being fired were "collisions" slowing the wheel down. Adding the flywheels greatly improved consistency. Recharge went from about 1 second down to like .2 seconds. Of course we'll have to see about my math :rolleyes:

They weigh 2.5 lbs. each. We know how much the final bot will weigh from CAD and this is a perfectly acceptable amount for us.
You have managed to scare me... What's your range like?

=Martin=Taylor= 02-02-2009 00:29
Re: pic: Custom Wheels
 
Quote:
Originally Posted by Andy L (Post 812549)
You have managed to scare me... What's your range like?
It was calculated at around 6'. We'll have to wait a few days to see for sure.

6' is more for awesomeness. I doubt we'd risk such a long shot in a match. 2-4' is more reasonable.

MrForbes 02-02-2009 00:31
Re: pic: Custom Wheels
 
Have you dont any prototyping with a flywheel shooter?

Andy L 02-02-2009 00:33
Re: pic: Custom Wheels
 
Quote:
Originally Posted by Hachiban VIII (Post 812554)
It was calculated at around 6'. We'll have to wait a few days to see for sure.

6' is more for awesomeness. I doubt we'd risk such a long shot in a match. 2-4' is more reasonable.
Wow, someone that thinks the same as our team. I see all these shooters shooting across shops for some reason, well I hope I get to see it in action at SV and Davis(are you guys at Davis this year?) on our side of the field preferably.

GaryVoshol 02-02-2009 06:52
Re: pic: Custom Wheels
 
Quote:
Originally Posted by squirrel (Post 812529)
I wonder if there's going to be a fps limit this year like in 2006?
Hush! Don't give "them" any ideas. :yikes:


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