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By: Andrew Schuetze
New: 04-28-2009 09:53 PM
Updated: 04-28-2009 09:53 PM
Views: 1565 times
Toltech's 2005 FRC robot redesigned as a tee shirt cannon. Just rewired to operate via a VEX controller with Spike and Victors, throws out the first pitch at the San Antonio Missions AAA minor league baseball game. This shot is from behind the robot on the front of the mound seconds before the pitch. Only allowed to carry the robot to mound and not allowed to shoot any shirts later due to exclusive contract... next photo is a bit blurred but the ball is almost if not already in the mitt of the catcher.
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04-28-2009 10:42 PM
bigbeezy
Re: pic: Toltech '05 bot throws first pitch
Wow thats pretty sweet. We are thinking about making a t-shirt cannon this summer. Do you have any specs on how you made yours?
04-28-2009 10:55 PM
Andrew Schuetze
Re: pic: Toltech '05 bot throws first pitch
You'll have to wait a few days before we can post up a schematic for how to operate a spike on the VEX controller but the Victors work no problem. The wiring is very rough at this point as we had just three days to rewire this using the VEX controller before we took it out for the ball game. You can get the details on the quick acting pneumatic valve on this thread. I also seriously suggest that anyone building such a device use pnuematic pressure rated steel pipe for your storage tank. We used black pipe from the hardware store use for natural gas lines for residential use.
Spikes have two (2) signal wires and one ground. The operating voltage comes from the positive terminal on the spike. The VEX controller has standard PWM outputs with ground/+5/signal so we made custom PWM cables that split the second signal (red wire) to a second PWM pin on the controller.
We are also awaiting a part to solder up a voltage regulator to take the 12 VDC from the FRC battery down to 8 VDC for the VEX system per the advice and posting by Squirrel.
04-29-2009 10:39 AM
Tazlikesrobots
Re: pic: Toltech '05 bot throws first pitch
So did the baseball team offer the robot a contract? It would make a great pitcher 
- Just kidding 
04-29-2009 09:05 PM
Andrew Schuetze
Re: pic: Toltech '05 bot throws first pitch
Hadn't thought of that but it might be a good fundraiser for the team.
04-29-2009 10:18 PM
Ternz
Re: pic: Toltech '05 bot throws first pitch
That is awesome. Did you get a MPH reading for the ball?
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