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
