I helped a guy set up a 7i95 with encoders. Not hard, but not super simple because pncconf doesn't support that board native and the 7i95 configurator didn't work. I used the ini name setting in pncconf, made a config for a 7i96 and had to change the name of the board in the ini file and rename the io pins.
I have a two switch home setup on my Emco using a prox switch as an index pulse after hitting a mechanical switch, using home_use_index and I'm using home_index_no_encoder_reset in master to home my x and z without having full encoder feedback. I made some videos on my YouTube channel about it. I'm not shying you away from the 7i95, i think it's a great board, but be ready for a little hair pulling unless you're pretty comfortable with the mesa ecosystem. That being said, anyone ever use a 7i95 for full closed loop to LinuxCNC using step dir and encoders? I know a lot of guys are using the 7i77 that way with analog and there's the 7i97 that would be fun to check out as well for analog setups. Curious if there's any kind of weirdness that happens using step pulse with encoder vs just using analog signal. Phil T. The Feral Engineer Check out my LinuxCNC tutorials, machine builds and other antics at www.youtube.com/c/theferalengineer Help support my channel efforts and coffee addiction: www.patreon.com/theferalengineer On Sat, Jun 26, 2021, 8:47 AM Leonardo Marsaglia <[email protected]> wrote: > Hello Andrew and Gene and sorry for the late reply. I hope you're doing > great! > > I believe I'll use the 7i84 as Peter suggested to expand the I/Os. But > instead of the 7i76E I'll go with the 7i95 which can read encoders too. > With this I can replicate what I did on the mazak which is to fool the > homing sequence to use the index pulse of the motors on the final stage. > > El mar, 22 jun 2021 a las 2:23, Gene Heskett (<[email protected]>) > escribió: > > > On Monday 21 June 2021 22:01:25 Leonardo Marsaglia wrote: > > > > > Thanks a lot Peter and Andy, > > > > > > I re read through the manual and found the SSERIAL port connection and > > > the recommendation of using a CAT5 cable cut in half. I missed that > > > part so I was a little confused about how to expand the I/Os. So, I'll > > > be more than ok with this board :) > > > > > Another possibility if you need lots of i/o, is the 7i90HD, which has a > > total of 72 lines. Firmware options for uo to 8 axises of steppers and > > encoders. Or I believe pwm-gens and encoders. The disadvantages are its > > 3, 50 pin i/o's that are all tied to the fpga, and easily damaged by > > noise. The fix for that is a trio of 7i42TA's which are effectly used as > > breakout boards, tradeing some bandwidth for the usual surge protection > > and giving you nice screw terminals to wire it up with. It can be driven > > from an epp parport, or from an spi port from a pi. With all the > > gingerbread I've put on the sheldon, I probably have 35 i/o lines unused > > yet. And I can fire up firefox and browse the net at the same time its > > running the sheldon. I felt keeping the ethernet port out of the lcnc > > arena, so the net port was available for updating and such was more > > important, and still do. 2 of my 4 machines are building and installig > > their own versions of linuxcnc from github master-gtk3 as I type this, > > including that rpi4. > > > > > El lun, 21 jun 2021 a las 4:45, andy pugh (<[email protected]>) > > escribió: > > > > On Mon, 21 Jun 2021 at 03:27, Leonardo Marsaglia > > > > <[email protected]> > > > > > > > > wrote: > > > > > Is the 7i75 > > > > > breakout board the way to add more I/Os to the 7i76E? And in that > > > > > case I suppose the direction of the I/O pins in determined in HAL > > > > > at the startup right? > > > > > > > > That depends on what you want. If it is just GPIO then look at > > > > smart-serial boards on the built-in port. > > > > If that still isn't enough, you could add one or two 7i74 boards to > > > > the 7i76E for a theoretical extra 3584 extra IO lines.... > > > > > > > > (smart serial has been recently expanded from 96 to 224 bits, but I > > > > am not sure if any available boards actually add more than 48 io > > > > pins each) > > > > > > > > -- > > > > atp > > > > "A motorcycle is a bicycle with a pandemonium attachment and is > > > > designed for the especial use of mechanical geniuses, daredevils and > > > > lunatics." > > > > — George Fitch, Atlanta Constitution Newspaper, 1912 > > > > > > > > > > > > _______________________________________________ > > > > 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 > > > > > > 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) > > If we desire respect for the law, we must first make the law respectable. > > - Louis D. Brandeis > > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > > > > _______________________________________________ > > 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 > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
