On Fri, Sep 14, 2012 at 2:44 PM, Stephen Dubovsky <smdubov...@gmail.com> wrote: > I was wondering...(can you smell the smoke?) > > On manual knee mills there are often ways to combine the knee and > quill scales in the DRO to directly add/subtract from one another, > giving only one combined Z reading. This part would be easy enough to > do in HAL on a CNC. Add/subtract the quill encoder to the knee's > linear encoder(scale). If the drives were enabled (but not > necessarily cutting), the quill would even 'chase' the knees position > trying to hold a commanded Z. But how would you change the soft > limits? You basically need to be able to add the knee's position > delta to each the Z+ and Z- limits. Are those accessible in HAL? On > a manual bridgeport moving the knee up and down for different tools w/ > greatly varying lengths (endmill vs tapping head) is de rigeur. Just > wondering if the same can be accomplished on a CNC during tool changes > to stay within the quills range of travel and preventing re-touching > off each time.
Perhaps one just moves a percentage of all Z moves eg+75% to one and -25% to the other (ratio depends on maximum travels of the machine) to both knee and quill at the same time to get maximum travel. I realise that does not optimise the speed of the quill when tapping but may be an easy hal fiddle Dave Caroline ------------------------------------------------------------------------------ Got visibility? Most devs has no idea what their production app looks like. Find out how fast your code is with AppDynamics Lite. http://ad.doubleclick.net/clk;262219671;13503038;y? http://info.appdynamics.com/FreeJavaPerformanceDownload.html _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
