On Wed, May 23, 2012 at 07:38:06AM -0400, John Kasunich wrote: > > If your PID loop is saturated during normal operation, that > means you are no longer accurately controlling tool position,
Yes! I have pid.N.saturated hooked directly to axis.N.amp-fault-in on both my machines. Properly tuned they never saturate even for one cycle. Also, the smart (for 1985?) servo amps on my mill have an adjustment that will fault if the tach voltage exceeds a setpoint. This is one possible way to detect runaway in the analog realm involving a minimum of hardware and no software. Also of course limit switches disable the amps directly in hardware, but I don't have any delusion that it would stop before hitting the end of travel. Maybe Z going up would, but that's it. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
