Prototype Small Wheeled Shooter

[AllenGregoryIV]

Originally Posted by dodar

You sir, have just lightened up alot of robots.

We hope so.

Originally Posted by Ether

Try slowing that second motor down (the BAG motor) . Try running it at ~10 volts.

See what happens. Easy enough to do.

Thanks for the recommendation; we still have a lot of work to do to optimize the whole setup. With the versplanetaries we can swap around motors and gear combinations so quickly that we plan to test a large number of them. We're also going to try to standardize on voltage as well, but that will take a bit more programming (since we don't have any type of speed feedback we can't do Bang Bang yet). We'll take your advice and test it. We agree that the last wheel is spinning too fast and is most likely slipping.

Originally Posted by ParkerF

Allen,

This is great work! I admire your lack of hesitation to give away this information. Shows you and your team's true colors.

Thanks and good luck at making it even better!

-Parker

P.S. - Have you tried shooting from the floor? What kind of angle do you expect to have to pitch the shooter to for the 3pter?

Thanks for the compliments. That really depends on how high we end up shooting from and our distance away from the goal. I'm not sure we could give a number. That height was less than 5 feet so in theory we could just shoot from there.

Originally Posted by Robo Hamsters

Just wondering how you set the one gearbox to be a 1:1 ratio?

Also, anyone have any ideas as to how you mount the banebots wheels directly to a CIM?

Thanks

We took the ring gear, sun, and planets out of a 10:1 versaplanetary. I'm not sure if you can do the same with the other gearboxes. Paul Copioli can probably expand on that. If I remember I'll post pictures in tonight's blog update. We'll probably have to swap around a few of the gear ratios during testing anyway.

Originally Posted by Robo Hamsters

Also we were wondering how you direct drive the banebots wheels with a CIM.

My thought would be to get an AM 8mm Hub and drill out the Banebots wheels for that and bolt them to it. I think it would work better than the 8mm to 1/2 hex adapter (It's not very long).

Originally Posted by Tom Line

Locking a stage in a planetary gear is fairly simple - look up how people did it with globe motors. It involves glueing the sun gear and planetaries together with something, then dremeling off the teeth of the planetaries so they don't touch the ring gear.

It's much easier than that. The spline on the output shaft is the same as the one on the sun gear. You just remove the whole 10:1 stage and bolt the front and back of the gearbox together.