On Mon, 2009-04-20 at 20:56 -0500, Jon Elson wrote: ... snip > One other thing.... We found this change > to be MOST helpful for rigid tapping, but I believe it ALSO is very > helpful in any threading operation. That was to increase the trajectory > planner's dispatch rate (TRAJ_PERIOD) to equal the servo rate. > That is in the univpwm_load.hal file, the line I have reads : > > loadrt [EMCMOT]EMCMOT base_period_nsec=[EMCMOT]BASE_PERIOD > servo_period_nsec=[EMCMOT]SERVO_PERIOD traj_period_nsec=[EMCMOT]SERVO_PERIOD > key=[EMCMOT]SHMEM_KEY > > You might try that with the same conditions of your picture posted above and > see if it helps. > > Jon
I think that might explain the zig-zag nature of my Z position trace. I wonder if Harris' rapid is fast enough to get across the thread, where in my tests I got half way (4=0.08333) before the HNC tried to correct the rate? If I used 4=0.120 I might have gotten the same result, since decreasing 4 also reduced the effect. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ Stay on top of everything new and different, both inside and around Java (TM) technology - register by April 22, and save $200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco. 300 plus technical and hands-on sessions. Register today. Use priority code J9JMT32. http://p.sf.net/sfu/p _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
