On Sunday 21 July 2019 15:27:17 Gene Heskett wrote: > On Sunday 21 July 2019 13:20:37 andy pugh wrote: > > On Thu, 18 Jul 2019 at 21:47, Pedro Grijalva > > <[email protected]> > > wrote: > > > Hi I'Interested on run Linuxcnc on RP4 > > > can you share the steps ? > > > > I have put the SD card image _temporarily_ here: > > http://www.linuxcnc.org/dists/buster/2.8-uspace/ > > > > Note that this is a run-in-place setup, as the debian packaging > > isn't set up quite right for Raspberry Pi. > > This means that you need to type this at the command-line to run it. > > (and yes, it really is dot space dot slash) > > . ./linuxcnc-dev/scripts/rip-environment > > linuxcnc > > > > (or latency-test to run the latency test) > > > > Please only download this if you have a Pi4 and genuinely want to > > experiment, for the sake of the web site bandwith limits. > > I am dl'ing it, and will get a pi4, and whatever card seems to be the > correct interface. Someone mentioned the 7i76E? but I've doubts it can > what I am doing. > > To dup what I am doing with the 7i90HD and a stack of 7i42TA's, I'll > need 3 encoders, two stepgens, a pwm with direction for the vfd, two > in's for homes, and several outs. I don't think the 7i76D's I have can > supply the 2nd and 3rd encoders for the jog dials. > > So what do I use? > > A 7i90 with an ethernet connector might work, but what it has is > rs422, and likely too slow at 10 megabits. OTOH, if it can do spi at > 50 megabits... Actually I am writing at 42Mb and reading at 25Mb, and > thats working fairly well under stretch right now. > Question for PCW.
That appears to be the 7i80 but it comes in 2 model numbers. So what makes the -25 worth $20 more than the -16 version? Both would appear to need the 7i42TA's if theres any noise, so would likely interchange with the 7i90HD. > Cheers, Gene Heskett 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-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
