06-03-2015, 07:55
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Technical Director
AKA: Gus Michel II
 FRC #3946 (Tiger Robotics) Team Role: Mentor
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Join Date: Jan 2014
Rookie Year: 2013
Location: Slidell, LA
Posts: 3,605
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Re: Looking For T-Shirt Cannon Help.
Independent of the look and drive, a few safety and engineering tips:
- No PVC. Use plumbing rated for air pressure. When PVC fails under air pressure, the shrapnel is terrible.
- Relatively large pipes and hoses. Ours has 1-1/4" carrying air for 2 barrels, 1" after the split. The solenoid valve is 3/4", and if we were buying today, it'd be 1".
- Relatively low pressure - 40-50 psi.
- Large barrel - ours is 3" i.d. much easier to shoot with the low pressure/high flow.
- Short burst of air: I think we settled on 30 ms; at 50 ms we sent t-shirts over the press box.
- Offboard A/C compressor, large tank: I don't remember the numbers, but a 1 cfm compressor would have to run continuously unless you only shoot a couple of times a quarter.
- plan for rain. We wound up putting our electronics inside a rubbermaid tote.
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Last edited by GeeTwo : 06-03-2015 at 07:57.
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