I understand. I'm running my DC servo's open loop with step/dir. So far any issues that show up are caught by the drives following error fault so I don't see any reason to close the loop inside Linux. And in any case then I wouldn't be able to swap back and forth between MACH3 and LinuxCNC. John
> -----Original Message----- > From: Leonardo Marsaglia [mailto:ldmarsag...@gmail.com] > Sent: December-15-19 6:27 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] 6i24 + 7i44 configuration > > Hello John, > > I don't know If I understand you correctly, but I already have the boards > and I intend to use the 7i70 for inputs (I have already 6 inductive sensors > only for the turret and also all the limit switches and some other switches > for the tailstock and tail body). Then I have more than 10 relays to drive > and that's where the 7i71 comes in. I already have the boards and I choose > them for the convenience of the RJ45 jacks. > > I planned to use the 7i33 to drive the servos and also the spindle but > since the servos behave excellent with step + dir (they work with 17 bit > encoders) and also I can simplify the mechanical setup I decided to use > them with step and direction instead of closed loop. So the 7i33 will be > used only to drive the analog spindle input on the VFD. > > The thing is, I'm lacking the breakout board for the step+dir so I was > thinking about using the 7i47 which seems to do the job, but I wanted to > ask here because may be there's another one that suits better for the job. > > > > El dom., 15 dic. 2019 a las 23:10, John Dammeyer > (<jo...@autoartisans.com>) > escribi�: > > > Let's see: > > 6i24 = $139 > > 7i33 = $69 > > 7i47 = $69 > > 7i44 = $69 > > 7i77 = $119 (48 outputs, not really for buttons?) > > 7i70 = $79 (48 inputs not really for Relays) > > ========= > > $544 > > > > Perhaps take a step back and make a list of how many inputs and outputs > > you expect to need. > > > > Wouldn't a 7i78+5i25 Plug-n-go kit for $158 work just as well? > > > > John > > > > > > > > > -----Original Message----- > > > From: Leonardo Marsaglia [mailto:ldmarsag...@gmail.com] > > > Sent: December-15-19 5:30 PM > > > To: Enhanced Machine Controller (EMC) > > > Subject: [Emc-users] 6i24 + 7i44 configuration > > > > > > Hello again. > > > > > > I'm testing my boards and configuration before I install everything on > > the > > > real machine. > > > > > > I'm configuring a lathe with 2 servos for the X and Z axis, one PWM > > > converted to analog for the spindle, and one encoder input for the > > spindle. > > > Also a lot of input and outputs to deal with. > > > > > > For that I purchased a 6i24 with a 7i44 to drive one 7i70 and a 7i71 for > > > inputs and outputs. In adition to that I originally planned to use a 7i33 > > > to drive the servos and spindle with analog voltage and also read the > > > encoders coupled to the screws and the one on the spindle. > > > > > > I changed my mind and I plan to use step + dir to drive the servos and > > > leave the rest as it was originally planned. So I guess I need another > > > daughter card to drive the servos via step + dir. > > > > > > From what I read the ideal board would be the 7i47 but I needed to ask > > here > > > first. Also I'm having a little bit of trouble finding the right firmware > > > for this kind of setup. > > > > > > To sum up: > > > ---- 7i70 ---->Relays > > > / > > > ----> 7i44 -----> 7i71 <-----Sensors, buttons, etc... > > > / > > > 6i24 ----> 7i33 <----> Spindle analog out/ Spindle encoder in > > > \ > > > ----> 7i47 ----> Servos step+dir output > > > > > > > > > Please let me know if this is the right approach and also guide to find > > the > > > right firmware because I'm not sure wich one I can use. > > > > > > Thanks as always and sorry for the long post. > > > > > > Leonardo > > > > > > _______________________________________________ > > > Emc-users mailing list > > > Emc-users@lists.sourceforge.net > > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
