MES on Prime?

[ndzied1]

I too have found the 50g MES much better for my needs than the Prime solver. With the 50g MES I can set up an environment for experimentation with a collection of related equations where I bounce around putting in different numbers as I investigate things.

For instances, I have a series of equations related to hydraulic cylinder calculations.
{'A1=pi*D1^2/4' 'A2=pi*D2^2/4' 'AA=A1-A2' 'Push=Pr*A1' 'Pull=Pr*AA' 'Ve=Q/A1' 'Vr=Q/AA' 'Vre=Q/A2' 'Te=s/Ve' 'Tr=s/Vr' 'Tre=s/Vre' } Where:

A1-> Bore Area
A2 -> Rod Area
AA -> Annular Area
D1 -> Bore diameter
D2 -> Rod diameter
Push -> Pushing Force
Pull -> Pulling Force
Pr -> Pressure
Ve -> Velocity Extending (normal circuit)
Vre -> Velocity Extending (regeneration circuit)
Vr -> Velocity Retracting
Q -> Fluid Flow
s -> Cylinder Stroke
Te -> Time to fully extend (normal circuit)
Tre -> Time to fully extend (regeneration circuit)
Tr -> Time to fully retract

When working, I generally know which combinations of input data are required to solve for something (if not the 50g lets me know). I can use this if I only want to solve for push force in which case I only need to enter D1 and Pr. The MES doesn't care that I haven't entered all the variables. But then, for instance, I solve for push force and want to then look at the pull force. I don't have to re-enter pressure, I just enter D2 and solve for Pull. Then I want to know how much flow I need to extend the cylinder 10 inches in 5 seconds so I enter s=10 and Te=5 and solve for Q. Then maybe I get 6.25 gpm for flow but I realize that the standard pump only puts out 6 gpm so I enter that and go back and see how that effects my extend and retract times. Hopefully you get the picture. It is a wonderful experimental environment within which to bounce back and forth when working out a problem.

And notice my equations do not have conversion factors in them. That is because the 50g lets me attach units to all the variables I use in the MES. It takes care of the conversions for me. So when I get some answer, it has units on it and then I can jump to the unit menu to convert my 6 gpm to 22.7 L/min for my EU friends.

Now that is wonderful tool in my humble opinion!