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Compressor/Pneumatics Review #2

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
We have never really extensively used pneumatics with the GRTFramework, so I'd 
like to make sure 
we are handling them in the most friendly and functional way possible.

Original issue reported on code.google.com by sparta...@gmail.com on 18 Apr 2010 at 4:40

GoogleCodeExporter commented 9 years ago 
From the surprisingly small amount of experience I have with pneumatics I have
gathered a (hopefully correct) understanding of solenoids. 
In the Two-Way Solenoid one of the commands listed is 'OFF'. I don't believe 
that
this is physically possible for the solenoid to preform. 

A SINGLE sided solenoid can be turned off, or puts the pressure to exhaust. 
With Two
sided solenoids, either the A side or the B side is pressurized (with the non
pressurized side going to exhaust.. This has to do with how the solenoid is 
built, it
shifts where it directs the pressure by some sort of sliding mechanism that 
aligns
with some slots for A and B/ A and B exhaust..

hmm.. Looks like
     A           B
    | |         | |
  | \  \           /  / |  <-- This parts moves side to side.. so A and B Exh line up
  |  \  \         /  /  |      Now, but shifted B and A Exh line up
      |  |    |  |
      B Exh    A Exh 

Anyway.
Trying to route both pressure to Exh would, I believe be problematic.

Single solenoids don't have this issue since if they shift, there is not other 
side,
so it's just spring loaded to return.. (basically you only apply pressure when 
you
want the solenoid in its less common position) 

I hope this makes (some) sense. If it doesn't/ you have different awesome-er
solenoids/ I'm just talking nonsense.. please tell me :)

Christina

Found some more legit drawings :D
Check out pg. 9 from the Pneumatics Manual
Dark black is Pressure (P)
Far left (FESTO) is a spring loaded 1 sided Solenoid (/\/ = spring)
To its right (SMC) is a two sided Solenoid

Original comment by CEWett...@gmail.com on 25 Apr 2010 at 8:14

Attachments:

GoogleCodeExporter commented 9 years ago 
This definitely needs to be corrected, and I do believe you are correct 
Christina...though it would be a good idea 
to test this on our solenoids.

Original comment by sparta...@gmail.com on 26 Apr 2010 at 7:26

GoogleCodeExporter commented 9 years ago

Original comment by sparta...@gmail.com on 25 Jun 2011 at 8:16