Yes I do "suddenly thought". Usually between waking and getting up. Or in the shower.
I'm not at liberty to say more than this is a drink dispenser that runs between 60 and 140PSI with a time varying profile thru a nozzle.
I control the pump via motor speed and I have pressure feedback. If I'm controlling the effect at a nozzle in a pressure system, I can't really see what I'm going to do with flow. Don't I focus on the pressure profiles? Flow is too slow and too inaccurate for controlling to a repeatable output profile when the nozzle varies with time.
It would seem flow would be much more valuable in the case where I have an unrestricted flow between, say, two tanks and I want to profile that or totalize it, another words, flow that would see little pressure variation.
This is rather like an electrical system where you need a specific voltage profile. You wouldn't add a resistor and convert to current feedback if voltage does the trick.
I'm adding flow here more as a check, as back to the voltage regulator, you might look at the current to limit over current. So the more I think about it the more using the pump as a flow meter seems to fit the bill.
No diagram needed. Pump-> Flow meter(or not)-> pipe -> pressure sensor-> nozzle.
Keith Cress
kcress -
