Hopefully you can return the broken sensors. Here is one that is known 100% to work and si VERY well documented and comes with example software. Adafruit is a company that specializes in making things like to easy to use. So every part has a short tutorial example software and. It's a US-based company that unfortunately can't offer Chinese prices.
I don't think I would run the pressure data into LCNC. I would have LCNC send some kind of signal (analog, digital, serial...)to the mister and the mister self-regulate using the sensor. This uses a Honeywell sensor. It Does 0-25 PSI (absolute) and there is an internal 24-bit A/D converter on-chip. They caim it has been factory calibrated. I 've used one like this that does not have the port (just a tiny hole in the chip) on a drone as an altimeter. It can measure the difference in air pressure if it moves a few feet up or down and is suitable for a z-axis control loop on a drone. https://learn.adafruit.com/adafruit-mprls-ported-pressure-sensor-breakout This part is overkill for what you need. I think all you need is a microswitch controlled by air pressure, and the switch directly controls the pump. Like a shop air compressor. On Thu, Mar 10, 2022 at 5:00 AM gene heskett <[email protected]> wrote: > Greetings all; > > Looks like I struck out, I can't get a means anthing output from two > supposedly 0-10 psi pressure thingies that are supposed to output .5 to > 4.5 volts for 0-10 psi of the manifold they are screwed into. > > History: > > I bought 5 of those mini air compressors I waxed poetic about a couple > weeks ago. Then embarqued ob an effort to print a manifold to combine > them, finally getting a print density that doesn't leak like a spaghetti > drainer. This to be used in place of shop air, to drive the mister on my > 6040 gantry mill. > > Finally getting a solid enough print of the manifold to hold about what > these little diaphram compressors can do, I'd guess I have a good 10 psi > wwhen its plugged off while they are running and they are delivering more > air than the mister actually needs. > > So I thought I'd feed a pressure sensor into one of the first 4 ports of > a mesa 7i76, have the mesa digitize it, which should give me around 6 > digits of active range, which should be enough to hal up some sort of > pwmgen control over how much power they get, with an eye to setting the > feedback to maintain a 2 to 3 psi at the mister nozzle pressure. > > But neither of the $23 sensors I bought, actually works. black to -, red > to 5v, green to dvm on my test table, one rests at nominally 1 millivolt, > the other at around 27 millivolts which doesn't change with the applied > pressure. > > What would you folks use in that situation? Simplest would be something I > can just push a 3/16" vinyl hose onto its pressure port barb. Something > with an output signal the mesa 7i76 can digitize? > > Thanks all. > > Cheers, Gene Heskett. > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author, 1940) > If we desire respect for the law, we must first make the law respectable. > - Louis D. Brandeis > > > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
