Greetings folks; Experimenting with various ways to see if I can find out why the initial homing is so slow and loaded with windup effects, effects that do not seem to affect the stepper driven axises.
It takes at least 5 seconds for it to get up to search speed, and another 5 seconds to get back to a stop after the home switch has been found, coasting 20-25 degrees getting stopped, then it goes into latch speed and takes another minute to get back to the switch edge. And theres a random offset being applied to the home position in the linuxcnc dro that does not exist The randomness gets obviously worse if I crank up the thread speeds, and causes a zero drift in the dro readings for repeatedly issuing the g0a5;g0a-15 while attempting to optimize the servo settings. This machine's install is your latest respin of buster. Download, burn and installed in late december IIRC. And rtapi shows up in an htop output, something that isolcpus normally hides from htop. That got me snooping. And there is no mention of isolcpus in /boot/grub/grub.cfg! >From uname -a: 4.19.0-14-rt-amd64 #1 SMP PREEMPT RT Debian 4.19.171-2 (2021-01-30) x86_64 GNU/Linux Note the date! So, whats the current status of the isolcpus boot parameter? Also latency-test will not run, can't find the threads, fast or slow. So someting is fubared IMO, but what? 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
