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#1
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COR Robotics and Subzero T-Shirt Cannon!
I had the awesome opportunity to work with Subzero Robotics (5690) this weekend on a T-Shirt Launching Robot. Subzero, located out of Esko, Minnesota (near Duluth) is an upcoming team in Minnesota, and incredibly fun to work with.
I CADed the robot on Creo Parametric and created a Bill of Materials which 5690 then ordered. The final robot includes multiple improvements and changes to the CAD model based on what materials were available. Here is a short video I threw together that shows the robot in action with a few pictures as well. Robot Specs: - 4 cim drive with 4 toughbox micro gearboxes - WCD using a hex output shaft from the toughbox micro - Toughbox Micro has a gear ratio of 8.45:1 - The air tank was purchased from Walmart (believe it or not) and is designed for use on a semi truck - The barrel has a fairly restricted range of motion from nearly vertical to about 30 degrees for safety reasons - The system is rated for up to 125 PSI, and includes a vent plug valve set to release air at 110 PSI - The Solenoid Valve that is used is a quick release 3/4" NPT valve - At max pressure, the robot can launch T-shirts around 100 feet and can fire 4 times before needing to refill the air We built the robot in 2 days with 10 people, and it was a bunch of fun! IF you have any questions or suggestions I'd love to hear them. |
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#2
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Re: COR Robotics and Subzero T-Shirt Cannon!
I wish I had seen that tank when we built our cannon. Instead we spent a painful amount of money for this because we wanted the 1" port.
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#3
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Re: COR Robotics and Subzero T-Shirt Cannon!
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#4
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Re: COR Robotics and Subzero T-Shirt Cannon!
And your solenoid was like $150 cheaper than ours. You really should publish your BOM because you found some good components.
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#5
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Re: COR Robotics and Subzero T-Shirt Cannon!
Will do! I'll be back home tonight and I'll make sure to post my BoM!
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#6
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Re: COR Robotics and Subzero T-Shirt Cannon!
Thank you Ryan for all your help building this robot! It was a great learning opportunity that I'm sure will help our team in the future!
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#7
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Re: COR Robotics and Subzero T-Shirt Cannon!
Great job guys! How many shots per tank estimated?
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#8
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Re: COR Robotics and Subzero T-Shirt Cannon!
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#9
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Re: COR Robotics and Subzero T-Shirt Cannon!
Here is the link to the Bill of Materials. It doesn't include a couple of components including the components necessary to articulate the barrel. Some additional brass fittings may also be useful for configuring the air system as desired. The logic behind not including some items is that it forces whatever team I'm working with to get creative, and engineer a solution based on the items available to them.
Thanks! When we fill the tank to 110 PSI we get around 4 solid shots. The tank drops by around 20 PSI after every shot. That would put the 4th shot at around 50 PSI which is more than enough to hit the bottom row of the stands at a high school football game! |
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#10
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Re: COR Robotics and Subzero T-Shirt Cannon!
For the valve here is a cheaper option that is rated for a much higher pressure. http://www.airbagit.com/Brass-Air-Va...irvalve-02.htm they also offer mounting brackets for them as well as rebuild kits. That is the one we used on a t-shirt cannon on my former team and I can verify its response time is very quick because we were able to control the distance of the shot by how long the valve opening pulse was.
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Re: COR Robotics and Subzero T-Shirt Cannon!
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#14
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Re: COR Robotics and Subzero T-Shirt Cannon!
The robot got its first real test today. We filled the barrel up with candy (with a foam plug put in first) and let it fly. The kids loved it! We haven't had any problems with the shooter so far, the only thing is that we still need to make sure it's completely air tight. I do believe we have a problem with some of our gearboxes, but hey that's what happens when you have the programmers build them.
So far we are very pleased with the robot and its performance. The crowd of children and parents were very excited and impressed. |
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#15
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Re: COR Robotics and Subzero T-Shirt Cannon!
Looks great! That range is nothing to scoff at for sure. It could use some decorations though.
4 shots isn't much... you should think about stocking extra tanks or using a larger air tank or something. |
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