> > I think that this part is not the best way, an analogue output voltage > would be best measured directly by an ADC, and is likely to offer > better repeatability than a 555 timer circuit. > > The 7i87 is s smart-serial card, and three of them could connect to > the 7i74 you were considering. >
I'll take a look at the 7i87. It should do the work, but I'm always trying to use what I know if possible. > What's the machine? LVDTs and RDVTs are interesting and precise, but > somewhat old-fashioned. I plan to replicate these in process gauges: https://www.marposs.com/media/5740/applications-044.jpg I'm not sure how they work exactly but I know an RVDT should perform great with the amount of movement I need on those arms (I'm guessing +/- 3° at maximum). So my idea is to sense the pivot of those arms with and RVDT. Given the harsh environment it sounds like the best solution. Also I can pretty much make them the size I want. I need a compact solution. I plan to make 5 or 6 of these gauges with two arms each working in differential mode. Each one is moved to the workpiece with a pneumatic piston and they can run on linear rails with protective covers. El lun, 10 nov 2025 a las 16:38, andy pugh (<[email protected]>) escribió: > On Mon, 10 Nov 2025 at 17:32, Leonardo Marsaglia <[email protected]> > wrote: > > > > https://www.analog.com/media/en/technical-documentation/data-sheets/ad598.pdf > > That seems like a reasonable choice. > > > And then convert the voltage output from the AD598 to frequency using a > 555 > > timer. > > I think that this part is not the best way, an analogue output voltage > would be best measured directly by an ADC, and is likely to offer > better repeatability than a 555 timer circuit. > > The 7i87 is s smart-serial card, and three of them could connect to > the 7i74 you were considering. > > What's the machine? LVDTs and RDVTs are interesting and precise, but > somewhat old-fashioned. > > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is > designed for the especial use of mechanical geniuses, daredevils and > lunatics." > — George Fitch, Atlanta Constitution Newspaper, 1912 > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
