We're in the same time zone, so it's the middle of the night here as well. :-)
If your VFD will communicate via RS485, you should be able to plug an RS232 to RS485 converter (about $8 delivered from Amazon) into the serial port and later LinuxCNC versions should be able to talk to the inverter without much trouble and without bothering Peter for MESA help. I haven't done this. It's second hand info from Russ' video, but he makes it look easy. Good luck! On 07/26/2016 03:43 AM, Gene Heskett wrote: > On Tuesday 26 July 2016 02:36:35 Bruce Layne wrote: >> Russtuff just uploaded a quick video showing how to program a >> Huanyang VFD that might be helpful. >> https://www.youtube.com/watch?v=7OszQS_BQMk > Thanks Bruce. I'll look tomorrow as its the middle of the night for me > ATM and the video might wake my missus. >> He's programming it for RS485 control, which would be nice now that >> Huanyang VFD support is in LinuxCNC 2.7 and above. I think many of >> the Huanyang inverters do not support the com port and it's difficult >> to tell which do from a visual inspection. The eBay specs are usually >> cut-and-paste and are often incorrect. I've read that even if the >> Huanyang VFD has the proper chipset to support the com port, it may >> not have the hardware as a cost saving "feature". I have a few of >> these VFDs. I should connect them to a motor one at a time and see if >> any of them support RS485, and use that for future CNC projects >> instead of relays and 0-10V analog control if possible. > I am not sure if RS-485 is supported on the device I bought. But in > emails from the seller, I was assured it would run with run/stop, dir, > and a straight pwmgen output for the analog input, just feed it into > the 0-5 volt port. However, and this is a huge IF, I have found that > powering it down overnight restores it to default settings, so I'll > take it apart and see if its got a dead CR2032 or similar in it, > because the defaults, while safe, suck at about 10ee-37 tor. Something > similar to where the Voyagers are now. If it doesn't have a backup > battery thats dead, then an rs485 channel will be needed to be setup > and an initial configuration stream will have to be fed to it. That > rather sounds like a PIMA to me. >> However, even if you aren't interested in RS485, you might be >> interested in the part of the video that deals with the parameters >> for ramp up time, ramp down time, motor current, etc. > Absolutely. I suspect I might have to have Peters help in cobbling up > an upload to the 5i25 I'll run it with, to put some different stuff on > the P2 plug header as I don't think its present setup can do RS-485 > anyplace. The image I have in it now essentially dups the 4 stepgens, > a pwmgen and an encoder on each port for 8 stepgens, two pwmgens and 2 > encoders per card with whats left as GPIO's. But first, read the fine > but tiny manual. It also has mention of braking R's, but no terminals > to attach them were to can be found. I did take it apart looking for > those. >> On 07/25/2016 02:56 AM, Gene Heskett wrote: >>>>> Greetings to you who are running an inverter driven spindle; I >>>>> have one of those 1 HP 230 volt 3 phase motors on the table, in >>>>> this case the one with the noisy bearings but it still rolls dead >>>>> free. With the inverter set to 90 hertz and its running, pushing >>>>> the green run/stop to stop it gets a rapid drop to around 75 hz, >>>>> then its turned loose to coast for quite a spell, 10 secs maybe, >>>>> at the end of which the DC comes on and its dead in its tracks in >>>>> less than 1 more rev. > Cheers, Gene Heskett ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports.http://sdm.link/zohodev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
