Glenn R. Edwards wrote: > Jon, > > Are you implying that you manually, or otherwise, get the table to within > one encoder revolution of home and then do a homing sequence with EMC? No, EMC2 searches at a moderate velocity for the home mechanical switch to close, then backs off and retries at a lower velocity, and then continues past until it finds the encoder index mark. On my system, the hardware in the encoder counter zeroes that count within one microsecond of sensing the index pulse, so it is more accurate than checking it once every servo period (default one millisecond). You can set the homing sequence to back away from the home switch and find the index pulse moving in that direction, too. It is quite flexible.
So, EMC2 searches for the switch, and then homes to the next encoder index pulse. As long as the index pulse is not real close to the switch trip point, it provides reliable homing to an extremely repeatable position. Jon ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
