Re: Prototype Small Wheeled Shooter
 

Not easily using the VersaPlanetary they have, only 3:1, 4:1, 5:1 and 10:1 single ratios.

Re: Prototype Small Wheeled Shooter
 

Oh well. How about leave it at 1:1 and stick a Talon on there and use this to give it a 1.92 ms pulse width ?

Re: Prototype Small Wheeled Shooter
 

Your mounting of the banebots wheels would indicate that you have no issues with upside frisbees. Is this the case?

- Sunny G.

Re: Prototype Small Wheeled Shooter
 

We think it will shoot upside down discs once we put a cap over the wheels and opposite wall. We haven't tested that in a while but from our initial tests we know that the upside down discs ride up the wheels if the assembly is not covered. Once covered they should fly very nicely. The wheels are thick enough to contact the rim of an upside down disc.

Re: Prototype Small Wheeled Shooter
 

Ether, what exactly are you trying to get us to test? We were able to pull back about 80-75% on the joystick before we noticed any distance change. We still know the front wheel is slipping. We're pretty happy with the setup as it is, since we can meet all of our design goals and more. We won't be doing too many more changes to the shooter configuration. Once we get some other systems improved, we will be adding light sensors and white lines to the wheels so we can do bang-bang speed control and more precisely control our distance.

Re: Prototype Small Wheeled Shooter
 

Sorry, I thought you were still tweaking it, that's all. I didn't realize you already had it hooked up to a motor controller and were able to try reducing wheel speeds by changing the motor voltage and observing the effect on frisbee flight. If you mentioned that in an earlier post, I missed it.

Re: Prototype Small Wheeled Shooter
 

No we are still tweaking, we just use our previous robot and extension cables with Anderson Powerpoles. That way we have a quick way to get joystick control of motors. We unplug the drive train and use one side for each motor. Anderson quick connects make the prototyping go much faster. It's also safer so we have the protection of the breakers and we can disable from the driver station.

Latest shooter video is up on the blog. Not much changed expect it is now two BAG motors and the blue wheels are the only ones contacting the discs. We'll probably use all Blues since they seem to wear down less and we like the color a little better.

Re: Prototype Small Wheeled Shooter
 

Very cool!

Re: Prototype Small Wheeled Shooter
 

Here are photos of the different wheels as of today. Each of these wheels as seen well over 100 Discs each. The greens have seen the most and have also been damaged the most by the discs because they are so soft.

We are planning to use the blue wheels as we think they will last the longest.

Photo 1
Photo 2
Photo 3
Photo 4

We have heard of teams have trouble with Colson wheels removing some of the plastic from the discs. That has not happened so far with our shooter setup.

Re: Prototype Small Wheeled Shooter
 

Kudos for sharing such an innovative implementation. We've ordered parts to test this approach for use on our rookie robot. Any other photos, videos, or comments would be greatly appreciated. Thanks again.

Re: Prototype Small Wheeled Shooter
 

Glad we could help, I'll update this thread and/or the blog as we keep making improvements.

Re: Prototype Small Wheeled Shooter
 

Versaplanetary 1:1 Conversion Instructions

We uploaded the instructions for the 1:1 conversion today, hope it helps.

Re: Prototype Small Wheeled Shooter
 

All your information has been most helpful. Especially for a team with only one mentor and a very limited budget.

I know this got asked a few days ago.....
Does anyone know if the 1:1 conversion be done on the 4:1 and 5:1 versaplanetary units?

Re: Prototype Small Wheeled Shooter
 

I should have a 5:1 in my hand tomorrow afternoon and I can tell you.
You can probably find out sooner by PMing Paul Copioli.

The 4:1 and 3:1 come with an 8mm output shaft so it would be more useful if you could do the 5:1 which comes with the 1/2" Hex output.

The CAD models aren't really clear on how the input gear assemblies are made for each gearbox.

Re: Prototype Small Wheeled Shooter
 

You can make all of them 1:1. You can also order different output shafts and replace the 8mm shaft with the 1/2 hex or others....