On Mon, 27 Oct 2014, p...@wpnet.us wrote: > Date: Mon, 27 Oct 2014 15:35:04 -0500 > From: p...@wpnet.us > Reply-To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] Lathe conversion with Mesa 5i25 / 7i76 > > The 7i76 only provides one encoder input since it's a stepper card not a > servo card. Can you point me in the direction of some docs on loading a > software encoder counter and configuring it for MPG use (one MPG, with axis > and step select switches). I'm new to LinuxCNC so it takes me a while to > find things in the docs (if they're there). > > Thanks, > > Pete C. >
The 7I76 provides one high speed encoder counter for spindle use and 2 medium speed encoder inputs for MPG use on field I/O pins 16,17,18 and 19. > > ------Original Mail------ > From: "John Kasunich" <jmkasun...@fastmail.fm> > To: <emc-users@lists.sourceforge.net> > Sent: Mon, 27 Oct 2014 16:30:47 -0400 > Subject: Re: [Emc-users] Lathe conversion with Mesa 5i25 / 7i76 > > HAL supports a nearly infinite list of things. > > Configuration wizards by there very nature can only support a small subset of > that. > > You can certainly load a software encoder counter and use it for the MPG. > > But if the Mesa card provides enough encoders (one per servo axis, one > for the spindle, and one for the MPG), you might as well use a hardware > encoder counter even though the speed is low. > > If you run out of hardware encoders, then use the software counter and a > couple of GPIO pins. > > > On Mon, Oct 27, 2014, at 04:16 PM, p...@wpnet.us wrote: >> I'm back at work on my lathe conversion, reviewing what I have so far, >> cleaning up documentation, etc. I've run into an issue / question, hopefully >> I'm just missing something. >> >> I have my spindle encoder connected to the Mesa 7i76 TB3 encoder inputs, >> which seems to be ok (still have to test operation). I'm looking to connect >> my MPG encoder somewhere on the 7i76, and I though that could be done on >> regular inputs due to it's relatively low frequency operation. Looking in >> PNCConf I don't seem to see an option to put the MPG encoder elsewhere. Am I >> missing something? Is it supported but not in PNCConf? >> >> Thanks, >> >> Pete C. >> >> >> ------------------------------------------------------------------------------ >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > -- > John Kasunich > jmkasun...@fastmail.fm > > ------------------------------------------------------------------------------ > _______________________________________________ > 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 > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
