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-   -   pic: 4901 won't run out of air this season. That's for sure. (http://www.chiefdelphi.com/forums/showthread.php?t=134411)

Lemon 12-02-2015 22:40
Re: pic: 4901 won't run out of air this season. That's for sure.
 
Well I guess we aren't the only team going with a lot of air this year, although we do have you beat by one gallon :D

orangemoore 12-02-2015 22:53
Re: pic: 4901 won't run out of air this season. That's for sure.
 
Quote:
Originally Posted by JohnFogarty (Post 1442795)
We did a lot of math on the volume of air our Cylinders use per stroke and we found that an air tank with volume like this is almost a necessity.

The tank is 15 LBS. (I am aware of the light weight version at harbor freight and we'll keep that in mind if weight is problem, which at the moment our robot is about 30 pounds under weight without the tank on.

Our plan was to use the compressor off-board. If we needed extra weight...on it would go. The compressor is also roughly 15 pounds.

100% Duty cycle at 100 PSI. Charge time is 5 minutes from empty to full. We don't need to empty the system after every match. We would only do so in the times where we needed to. I also checked the rules for that.
Finals Could Be a problem if you have to fix something during that time.

JohnFogarty 12-02-2015 23:00
Re: pic: 4901 won't run out of air this season. That's for sure.
 
Quote:
Originally Posted by orangemoore (Post 1442990)
Finals Could Be a problem if you have to fix something during that time.
Having been through elims at orlando last year, I think we should be fine. We wouldn't need a full charge to be effective either. The number of actuations we get from a half charge is at the minimum of what we'd need to score around 100+ points by ourselves.

Our goal with this design was extreme simplicity and speed. Come reveal night you should see that we've achieved just that.

GeeTwo 12-02-2015 23:31
Re: pic: 4901 won't run out of air this season. That's for sure.
 
Quote:
Originally Posted by JohnFogarty (Post 1442795)
100% Duty cycle at 100 PSI. Charge time is 5 minutes from empty to full. We don't need to empty the system after every match. We would only do so in the times where we needed to. I also checked the rules for that.
Cool - when I looked for Ultimate Ascent (our primary climber actuators were pneumatic, as well as the "trigger" for the frisbee thrower), the only 100% duty cycle compressors I found were significantly larger.

JohnFogarty 13-02-2015 00:04
Re: pic: 4901 won't run out of air this season. That's for sure.
 
Quote:
Originally Posted by GeeTwo (Post 1443020)
Cool - when I looked for Ultimate Ascent (our primary climber actuators were pneumatic, as well as the "trigger" for the frisbee thrower), the only 100% duty cycle compressors I found were significantly larger.
I did a search on compressors on CD and found this thread http://www.chiefdelphi.com/forums/sh...d.php?t=129321 easily which had a spreadsheet that gave a lot of useful info that helped us decide on the compressor.

MrForbes 13-02-2015 00:08
Re: pic: 4901 won't run out of air this season. That's for sure.
 
Inspection will be fun, you get to wait around for the compressor to refill the tank.....

Sounds like a neat robot, hopefully we'll see some video soon!

chapman1 13-02-2015 00:08
Re: pic: 4901 won't run out of air this season. That's for sure.
 
Well done! Tongue in cheek is sorely lacking not only in today's world, but also in FRC

Chinske4296 13-02-2015 22:12
Our team went with an airless robot design. (No compressor or air tanks) early prototypes had pneumatics, but they were voted out.

Sperkowsky 25-02-2015 22:31
Re: pic: 4901 won't run out of air this season. That's for sure.
 
we may use this as mass air storage for a t-shirt cannon. Could you explain how you set it up ;)

Thanks - Sam

JohnFogarty 25-02-2015 23:21
Re: pic: 4901 won't run out of air this season. That's for sure.
 
Quote:
Originally Posted by Sperkowsky (Post 1449949)
we may use this as mass air storage for a t-shirt cannon. Could you explain how you set it up ;)

Thanks - Sam
The air tank comes with a bronze output fitting. That fitting has two outputs on it one 1/4 NPT port and one 1/8 NPT port where the gauge is normally. We simply plugged the 1/4 NPT output and then put a fitting into the 1/8 NPT output to allow for use with the pneumatic tubing allowed within the rules.

Funny enough. We now use a 7 Gallon Aluminum air tank on our bot.

Sperkowsky 26-02-2015 10:52
Quote:
Originally Posted by JohnFogarty (Post 1449978)
The air tank comes with a bronze output fitting. That fitting has two outputs on it one 1/4 NPT port and one 1/8 NPT port where the gauge is normally. We simply plugged the 1/4 NPT output and then put a fitting into the 1/8 NPT output to allow for use with the pneumatic tubing allowed within the rules.

Funny enough. We now use a 7 Gallon Aluminum air tank on our bot.
Alright thanks


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