Speaking of Yaskawa, I have a Yaskawa SGMP-15U314MS motor which seems to combine the commutation information within the position information. There are three pair of wires, each with what appear to be an encoder signal. To use this motor with my setup, I will either need to find a way to decode the current signals or fit the motor with hall sensors. Does anyone have experience with either?
Kirk ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ On Wed, 2007-03-07 at 00:20 -0600, Jon Elson wrote: > Noel wrote: > > >Dino, > >The Omrons are similar (if not the same) as Yaskawas. > >I run the 5I20, 7I33 and 7I37s. Works good. > >Tuning is tricky as the drive/motor combo has a PID loop itself, and EMC > >adds and external position loop. > > > > > I set up some Yaskawa ServoPak drives (SGDP I think was the model) > using my Universal Stepper Controller, and it was quite an amazing system. > I used it in step/direction mode, and tried it both open-loop and with the > ServoPak's encoder outputs connected to the Stepper Controller, so you could > go to e-stop, spin the motor by hand, and then go back to CNC mode and > it would > maintain position throughout. I had no tuning problems at all, it was > an amazingly > dynamic system. I didn't want to mar the motor shafts, but it felt like > I could have > put a pair of vise-grips on the shaft and not moved the motor a fraction > of a degree. > > If you use it closed-loop, you want very little P gain in the computer loop. > > Jon > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys-and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
