> > Hi Leonardo, > > I've attached a simple schematic I came up with recently for exactly the > same purpose (0-10v analog out from 0-3.3v pwm). I have not had the > chance to breadboard it yet, but believe it should work. You can adjust > the R-C filter values as needed. The choice of opamp is fairly arbitrary > as well, although a "rail to rail" part that gets close to 0v would be > helpful. > > You may not want to be making your own circuit, but it sounded like you > are getting pretty desperate. If you would like this circuit tested before > you spend time on it, I might have time later today to try it out. >
Hi Ralph and thank you! Not desperate yet lol, but I would like to tick that solved so I can wire everything up and start moving that router :). It looks very similar to what we used a few years ago If I remember correctly. So if the UP/DOWN thing with the digital inputs doesn't work I surely implement that. MODBUS is out of discussion because it obviously needs another interface board. I don't why many VFDs have to be all about extra boards but servo drives all come with these options already built in. El dom, 3 abr 2022 a las 13:30, Ralph Stirling (< [email protected]>) escribió: > Hi Leonardo, > > I've attached a simple schematic I came up with recently for exactly the > same purpose (0-10v analog out from 0-3.3v pwm). I have not had the > chance to breadboard it yet, but believe it should work. You can adjust > the R-C filter values as needed. The choice of opamp is fairly arbitrary > as well, although a "rail to rail" part that gets close to 0v would be > helpful. > > You may not want to be making your own circuit, but it sounded like you > are getting pretty desperate. If you would like this circuit tested before > you spend time on it, I might have time later today to try it out. > > -- Ralph > ________________________________________ > From: Leonardo Marsaglia [[email protected]] > Sent: Sunday, April 3, 2022 4:50 AM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Best way to get analog voltage from 7i95 > > CAUTION: This email originated from outside the Walla Walla University > email system. > > > > > > What are you searching for? You don't really need the optical isolator > if > > the VFD and computer grounds are tied together. If you do want > isolation > > then almost any optical isolator will work Even those "C" shape sensors > > will do the job, The resistor and the capacitor are essential but their > > values are not critical as long as the product of the R and C adds up to > > about the same. > > > > I just caught what you were asking lol, I'm a little burned out these days. > I was searching for Andy's suggestion to see if there was something here > but it's complicated. Electronic component distributors here are not that > big like the ones in the US . So they don't have the variety you have > there. Also they are not that well optimized for online selling like for > example Digikey, so searching for a component is really a pain in the ass > sometimes. In fact, many times in the past when my brother and I were > experimenting with induction heaters, it was a lot easier and practical to > purchase everything from Digikey and ship it here, the shipping usually > took 3 or 4 days. The obvious problem is when you have to purchase 5 USD on > an item and the shipping costs like 80 USD. > > El dom, 3 abr 2022 a las 6:10, gene heskett (<[email protected]>) > escribió: > > > On Saturday, 2 April 2022 23:51:58 EDT Chris Albertson wrote: > > > What are you searching for? You don't really need the optical > > > isolator if the VFD and computer grounds are tied together. If you > > > do want isolation then almost any optical isolator will work Even > > > those "C" shape sensors will do the job, > > > > And quite likely they can also do the voltage boost to a 10 volt swing > > needed at the output, and 20x faster than the typical 4 pin opto. I'd put > > them in the dark with a heat shrink sleeve though. > > > > > The resistor and the > > > capacitor are essential but their values are not critical as long as > > > the product of the R and C adds up to about the same. > > > > I'm not convinced the filter would be needed, the vfd will generally have > > its own filter. > > > > > On Sat, Apr 2, 2022 at 8:32 PM Leonardo Marsaglia > > > <[email protected]> > > > wrote: > > > > Well, a quick search gave me ZERO results here. The only results were > > > > at ar.mouser.com but mouser is not established here AFAIK, it looks > > > > like their > > > > spanish site is from Mexico. > > > > > > > > El sáb, 2 abr 2022 a las 19:15, gene heskett (<[email protected] > >) > > > > > > > > escribió: > > > > > On Saturday, 2 April 2022 17:14:41 EDT Andy Pugh wrote: > > > > > > > On 2 Apr 2022, at 04:33, Leonardo Marsaglia > > > > > > > <[email protected]> > > > > > > > wrote: > > > > > > > > > > > > > > Well, I can try that but I recall we did a simple low pass > > > > > > > filter > > > > > > > years ago > > > > > > > > > > > > This works, and is isolated. > > > > > > > > > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fphotos.google.com%2Fshare%2FAF1QipPXuj4R1h7P3oLpKCcGnfS-mFd-qO5nF&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C58b86ce96b304d7089f208da1568345d%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637845834553819364%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=pwqrZOzr6kzBZN6OjdOHpNMFVm72HrCcpzEJJbunGqI%3D&reserved=0 > > > > Pe> > > > > > > WEY-40VKkLIfDkAhSi7m4YDPVm0JCGQ/photo/AF1QipPEONYllA-BBGWD6cOLXsS > > > > > > WFnCU3 X27btSueFJs?key=dDNfajB5TTZDalphY2dKamtVeDdrcTRJaGZqdmZR > > > > > > > > > > And that is exactly what the doctor ordered. Thanks Andy. > > > > > > > > > > But can Leonardo src it in his reach? > > > > > > > > > > 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://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C58b86ce96b304d7089f208da1568345d%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637845834553819364%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=AReEdGfEGydsA7Y8JbJzxbSEhWW%2FVmtsMw81i6bhdIU%3D&reserved=0 > > > > > > > > _______________________________________________ > > > > Emc-users mailing list > > > > [email protected] > > > > > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C58b86ce96b304d7089f208da1568345d%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637845834553819364%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=AReEdGfEGydsA7Y8JbJzxbSEhWW%2FVmtsMw81i6bhdIU%3D&reserved=0 > > > > > > -- > > > > > > Chris Albertson > > > Redondo Beach, California > > > > > > _______________________________________________ > > > Emc-users mailing list > > > [email protected] > > > > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C58b86ce96b304d7089f208da1568345d%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637845834553819364%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=AReEdGfEGydsA7Y8JbJzxbSEhWW%2FVmtsMw81i6bhdIU%3D&reserved=0 > > > > > > 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://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C58b86ce96b304d7089f208da1568345d%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637845834553819364%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=AReEdGfEGydsA7Y8JbJzxbSEhWW%2FVmtsMw81i6bhdIU%3D&reserved=0 > > > > _______________________________________________ > Emc-users mailing list > [email protected] > > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C58b86ce96b304d7089f208da1568345d%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637845834553819364%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=AReEdGfEGydsA7Y8JbJzxbSEhWW%2FVmtsMw81i6bhdIU%3D&reserved=0 > _______________________________________________ > 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
