Jon Elson wrote: > Maximilian H wrote: >> Hello Jon, >> >> 0,5 millisecs is quite good. I was asking because I could get the Oxford >> PCI840 to just about 10ms servo cycle time before the driver would cause >> an error. >> >> > I can't answer for any Mesa products, but I have made some pretty > detailed measurements > on 600 MHz Pentium III CPUs, motherboard parallel port and my Universal > Stepper and PWM > controllers. A 4-axis servo loop, which involves reading the current > position, calculating the > PID and then writing the new velocity info, takes about 100 us.
Last time we talked about this (<http://thread.gmane.org/gmane.linux.distributions.emc.user/8473/focus=8594>), i measured that the 7i43 tops out at about 5 KHz for a 4-axis servo machine, assuming you want 50% of your CPU time for things other than talking to the 7i43. -- Sebastian Kuzminsky ------------------------------------------------------------------------------ Join us December 9, 2009 for the Red Hat Virtual Experience, a free event focused on virtualization and cloud computing. Attend in-depth sessions from your desk. Your couch. Anywhere. http://p.sf.net/sfu/redhat-sfdev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
