On Fri, 2 Oct 2020 23:11:55 -0400 Gene Heskett <ghesk...@shentel.net> wrote:
> On Friday 02 October 2020 19:55:53 Aaron Plattner wrote: > > > On 10/2/20 1:17 PM, Dan Arena wrote: > > > Gene, > > > > > > Following up more about xfce4, you should be able to go into their > > > Settings Manager and you can turn off the Screensaver and uncheck > > > Power Management under the Advanced tab. You will still want to > > > add the lines I mentioned before into /etc/X11/xorg.conf to > > > prevent the screen from going blank though. > > > > > > I also think it would be a useful feature for LinuxCNC to include > > > an option where it itself can prevent screensavers. This would > > > not be too hard for them to do, see > > > https://stackoverflow.com/a/31504731/1941627 > > > > > > A friend also just brought up a good point... do these machines > > > not have a physical emergency stop button? It seems like with > > > them being as dangerous as you say they are, they should. I know > > > the couple mills I have seen do. > > > > I agree with this. There are so many things that could go wrong > > between the keyboard and software commanding the machine to stop > > (swapping prevents something from getting scheduled, interrupt storm > > from a rogue device delays processing, etc.). If this is really a > > safety critical feature then everything in the system along this > > path needs to have realtime guarantees, redundancy, and follow > > something like MISRA coding standards. > > > > It would be *way* easier and cheaper to put a big red stop button on > > the machine itself, and bypass this problem of screen locking > > programs entirely. > > > > I would not recommend relying on the computer for this. > > This is quite true, and if it can't be fixed, I will be forced to > install a smash it switch that interrupts machine power. But I've > some pretty high cap supplies that can keep it moving for several > seconds after the switch has been fisted. A software e-stop OTOH can > stop it dead in the water in a very few milliseconds. That sounds trivial to fix. Have the red stop button operate relays that interrupt the circuits exactly where the software would. > 5 maybe. The > diff might be 50 bucks worth of smashed tooling for me. And $2000+ > for a similar screwup at Toyota, who carves their lease only high > output TRO engines for the racers with this same SW. Or were, they've > taken down the youtube video as it was showing things they didn't > want the joe six-packs copying. > > > Thanks Aaron. > > > > > I would also take this issue up with the LinuxCNC community. Is it > > > supposed to work like that? Does a new install from the LinuxCNC > > > "Install DVD" behave the same? > > At the instant yes, Andy has an install patched and running, and if > it's still working in the morning he'll respin the install iso > tomorrow. But his patch is not working for me, yet. > > > > Thanks, > > > Dan > > > Cheers, Gene Heskett _______________________________________________ xorg@lists.x.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: https://lists.x.org/mailman/listinfo/xorg Your subscription address: %(user_address)s