I usually change isolcpus in my grub file under /etc/default. You can use sudo nano /etc/default/grub, ctrl+s to save, ctrl+x to close, then accept the change with sudo update-grub
Phil T. The Feral Engineer Check out my LinuxCNC tutorials, machine builds and other antics at www.youtube.com/c/theferalengineer On Sun, Mar 7, 2021, 1:46 PM Mark Johnsen <[email protected]> wrote: > On Sun, Mar 7, 2021 at 7:25 AM Gene Heskett <[email protected]> wrote: > > > On Sunday 07 March 2021 06:58:01 Gene Heskett wrote: > > > > > > > > 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 > > > > I don't know the inner workings of the LinuxCNC home switch routine as my > machine doesn't have a home switch (someday hopefully). However, it sounds > like an acceleration/deceleration setting for the homing routine is too > low. At least that's what I would look at with an off-the-shelf motion > system. > > This isn't related in terms of code to LinuxCNC, but in general > motion control practice: > For an old Parker compumotor 6k2 motion controller, the homing routines had > their own Accel, decel, home to index (was it John D w/ the 2 mechanical > switches), and other routines such as approach from CW or CCW, go past and > slew back slowly, etc... I would look at that rather than the linux setup > (isolcpus, latency, etc). But, I'm not an expert on this.. > > Mark > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
