On Sunday 09 February 2020 07:10:11 Mark wrote: > On 2/8/20 23:56, Gene Heskett wrote: > > Greetings all; > > > > Previously with the kernel on my web page running, there was an > > occasional glitch in the sound of the z motor even at slower speeds, > > like the z motor being slowed for a millisec or so when manually > > jogging from the key board, but not when running gcode or by mdi > > moves. > > > > Friday I installed a newer kernel that seems to have solved that as > > I spent 10 minute jogging it around with hearing that motion glitch. > > Then I did an apt update which showed 113 packages to be updated, > > so I did that, getting all the updates discussed in todays magpi. > > Then I rebooted and played some more, and was able to make it move x > > almost 50% faster, and z about 20% faster. latency-test (no > > base)period was about 1/3rd the time of the previous kernels 50 > > u-secs. > > > > I haven't yet made an installable tarball and posted it, but will in > > the next day or so, because I think this is about ready for > > primetime. I also did a fresh git clone and uspace build of > > LinuxCNC-master, which seems to work as advertised. Everything I > > tried today Just Worked. > > > > Comments? > > > > Cheers, Gene Heskett > > Buy a lottery ticket? > > > Mark > Thanks Mark, but I think I already did that when the buildbots arm machine was turned off nearly 18 months ago because they (Seb I think) were rebooting it daily. And I started building my own linuxcnc-master. But the kernel was old and stuck at pi3, so when the pi4 became availale, I bought a 2G pi4, and started to see if I could build my own using Big Johns recipe from gnipsel, but actually building it on my own pi4. No crossbuild.
And I think I now have something that could also come back into the linuxcnc fold and once again be available for download direct from the buildbot which has a lot more bandwidth availble than by measly 10 megabit residential service. But obviously the odroid it was being built on before wasn't near stable enough. Thats something the pi's always have been, dead stable, both the 3 and 4 running from power bump to power bump for several moths of uptime at a time. Now I've installed a factory referbed Cyberpower 650 WA ups on mine and this kernel has now survived past 2 such short bumps. The latest nut built right on the pi4 just works except the load is so light it reports zero until I added a wallwart feeding a usb hub that carries the logitek dongles for keyboard and mouse, now it says 8%. So thats at least 8 hours of holdup for $35 with free shipping. If that battery is fresh, tigerdirect is selling them for $35 with free ship, it ought to hold up that pi with its 25 watt supply for 8 or so hours or more, while my 20kw nat gas generator just outside the garage back door will see to it power is available 8 seconds or so after the local 7.2 kv goes away. I have made a couple offers to supply a 2g pi4b with a 64GB boot u-sd, and ssd for swap and workspace and a power supply to replace the odroid for the buildbot farm at zeru cost to linuxcnc, but the only replies have been from the crickets. Thats discouraging. Take care all. 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
