On 02/16/2020 06:10 PM, John Dammeyer wrote:
Hi Sam,
Nice. But it does seem to support my premise on isolating LinuxCNC from the
hardware control.
For example, way back a Pentium 386-66 with WIN-95 and MACH2 CNC was able to do
this at 25KHz stepping.
A BeagleBone Black with Machine Kit has PRUs to do the stepping and it's what,
4 years older than a RPi4?
You’ve already shown that for a 1GHz+ LinuxCNC system that with an external
Ethernet Hardware engine you can now get faster stepping rate .
But only 10K steps/second on a 1GHz+ Pi?
Well, I really don't think software stepping is a good
solution except for desktop "toy" machines of very low
performance. I've been making a step pulse generator for
EMC/EMC2/LinuxCNC since 2002. It can
go up to 250K steps/second on all 4 axes at the same time.
It can provide far finer timing resolution
that any software stepping code, even the Beagle Bone's
PRU. (Step timing resolution is 100 ns.)
Even better than that, I also make controller/interfaces for
analog velocity servos and PWM servos.
Jon
_______________________________________________
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
