Hi all,
Quick question about solenoids. What is the difference between the am-3323 / 3324 and the am-2344 / 2343
Thank you
Mostly price and size, the more expensive solenoids are smaller.
The smaller solenoids have a smaller CV (which tells you how fast air can move through the solenoid).
The CKD solenoids have M5 ports and the Mead solenoids have 1/8" NPT ports which are more common.
Is there a performance advantage to one vs. the other or is it just connection type and size?
Depends on the application, the higher CV allows more air through so for catapults or other applications that need air quickly they are more useful. We are moving in the opposite direction and getting smaller solenoids and going down to 5/32" tube for most applications to make organizing the tubing easier on the robot and making everything smaller and lighter.
I concur completely on the first part. Low Cv solenoids should only be used where the amount of air required is small (e.g. a shifter) or a more stately rate of action is desired.
As to the smaller tubing, you’re playing with the edges of the (2017 and other recent) rules with this. Emphasis mine:
While the first part of R82-E would appear to allow it, I would not consider 5/32" nominal tubing to be functionally equivalent to 1/4" nominal tubing any more than I would consider 16 AWG wire to be functionally equivalent to 12 AWG. (Usual caveat about next year’s rules possibly being different.)
Sorry to be “that guy”, but I keep seeing incorrect terminology here on Chief Delphi (stating “Solenoid” when you mean “Solenoid Valve”).
A SOLENOID is “a cylindrical coil of wire acting as a magnet when carrying electric current”. Typically they have a floating steel pin that is pulled in by the electromagnet. A solenoid can be used as an actuator; no pneumatics required.
A SOLENOID VALVE is a valve with a small solenoid to shift the valve spool in one direction. A second solenoid or spring shifts the spool in the opposite direction.
https://cdn3.volusion.com/vyfsn.knvgw/v/vspfiles/photos/am-2344-2.jpg
A solenoid valve & cylinder typically have much more force than a solenoid actuator, but requires a complete pneumatics system. If you don’t need a lot of force maybe a solenoid is a much simpler solution.
Wow. Here we go again!
Q619 exactly defines the meaning of “functional equivalency” in this rule. For a piece of tubing to be functionally equivalent to the tubing provided in the KOP per R82-E, it must:
– be flexible pneumatic tubing, not rigid metal pipe or tube
– meet the R80 pressure requirements
– be unmodified except as indicated in R81
Look at the equation for hoop stress to understand how the safety of pneumatic tubing greatly increases as the characteristic diameter decreases.
The comparison to electrical wiring should be modified like this: cable rated for 300V is not functionally equivalent to cable rated for 300KV.
Yes, Virginia, 5/32" OD tubing is legal in FRC.
So in Virginia, but not DC and Maryland right.