On Wednesday 04 December 2019 03:25:20 Chris Albertson wrote: > Mesa FPGA cards are so cheap now are parallel port cards worth it? > Dramatically better performance for not much difference in cost > I'd argue about the diff in cost. A 5i25 is still about $60 more expensive than an EPP parport, card. The 7i90 for pi based stuff is roughly comparable to the 5i25 for wintel stuff, but it really needs a trio of 7i42TA's to make it useable as I don't consider the 7i90's 50 pin scsi sockets at all useable. The 7i90/7i42TA combo is a more capable combo. The 7i42TA's not only snub the noise that can and has blown the 7i90's, they also supply easily wired terminal strips. But that does put the 7i90/7i42's at a bit more than $200. You do get a lot more control lines though.
So the $25 parport card, driving a $23 SainSmart BoB, is still about the cheapest starter kit around. The SainSmart has no speed limiting opto-isolators in its outputs, a huge advantage as the stepper drivers seem to include those anyway. I can't say the same for its inputs, but in case you've a very high speed encoder, they are easily bypassable by anyone who can trace the circuitry. > On Tue, Dec 3, 2019 at 7:21 PM R C <cjv...@gmail.com> wrote: > > Hello, > > > > > > what would be a good PCIe card t use with linux-cnc, would any card > > that does ECP/EPP do? > > > > > > thanks, > > > > > > Ron > > > > > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
