On Monday, January 10, 2022 9:05:01 AM EST Ed wrote: > On 1/10/22 6:35 AM, Les Newell wrote: > > How old is your copy of LCNC? I just ran your code on my plasma and it > > ran smoothly with no detectable hesitation on the transitions between > > arcs. > > > > Les > > I had a computer die that was running one of my vertical mills. I > changed it out by swapping HD and driver card to a different computer. > Works OK except at the entry point to a helix it will give a little > twitch and go on to the rotation where it will twitch every time it > passes that point. That computer has a high latency problem where the > old one did not. > > > Ed. That latency would be my clue to run "uname -a" from a terminal screen and see if the running kernel is a rt version.
Most of my machines will reply as: Linux GO704 4.19.0-18-rt-amd64 #1 SMP PREEMPT RT Debian 4.19.208-1 (2021-09-29) x86_64 GNU/Linux Wintel based hardware IOW. And nearly all are booting from small SSD's of 60 or more gigabytes, cheap, and faster than stink. Even that is an older version nowadays, but so is most of my hardware, with 2 exceptions, is all old off-lease dell's bought without the windows license, cheaper that way. Big, not too power efficient, but they'll give you uptimes to the next power failure, or the rapture. Here is how I've proceeded: If the rt isn't there, backup the /home/$user/linuxcnc directory to separate storage on a different drive, download the latest LinuxCNC install .iso and burn it to a dvd, disconnect that drive, reboot to that dvd and reinstall, hook the backup up and copy the linuxcnc directory to the same place on the new install. Andy has already written the first run scripts that will update your old configs and its quite likely that after that first run, your old codes will Just Work. It makes this install to a $40 SSD look very inviting as its a very welcome speed up, they read at 600 or more megs a second, 5x faster than spinning rust drives. And in 3+ years here, the only SSD failure was on my rpi running my Sheldon, but it wasn't the drive, it was the usb to sata adaptor since the rpi's don't have a sata interface. Replaced the adaptor with a Startech brand and the drive was still good. Data was all there. I've had 4 hard drive failures in that same time frame. So far, SSD's Just Don't fail. I've a mixture of Kingston, Adata & Samsung SSD's here, about 10 total. 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, 1940) 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
