On 04/11/2014 12:07 PM, Gene Heskett wrote: > In actual practice, at least here Jon, hitting the +Z > limit is astronomically unlikely, assume +Z is to the > right when viewing the lathe from the normal, spindle on > the left, perspective. But my homing procedure, sets Z0.0 > at the face of the chuck +.005". So while a tap is never > homed against, its still possible for the forward, into > the hole stroke of a g33.1, to exceed that MIN_LIMIT if > the work is chucked too deeply. IMO to prevent work or > tool damage, the reverse should be issued at the limit > point, and coupling should be maintained during the > turnaround until the tool is backed out at lest to the > start point, then do the e- stop. While I haven't tested it, I think if you set up the home switches and axis limits in the normal manner, then the program would not be able to be run if it would run out of -Z travel! You'd hit run and immediately get "Program exceeds minus Z limit at line 123". Now, the one way you could get tripped up is that the -Z travel actually EXCEEDS the commanded depth as the spindle needs to stop and reverse. So, this leaves a small distance, depending on thread pitch and how fast the spindle can reverse where you could get into trouble.
Jon ------------------------------------------------------------------------------ Put Bad Developers to Shame Dominate Development with Jenkins Continuous Integration Continuously Automate Build, Test & Deployment Start a new project now. Try Jenkins in the cloud. http://p.sf.net/sfu/13600_Cloudbees _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
