On Wed, 2008-11-26 at 21:29 -0500, Bob Freeman wrote: > Hello, > > Am interested in using EMC2 to control some traditional antenna > rotators, like the Alliance U-100. These are AC motors that are turned > on/off and reversed using relays (have known these to be called > "bang-bang" controllers). > > I would like to use a triac and encoder feedback to control these in > EMC, maybe, using PWM. Anyone done this type of control in EMC, or have > some pointers, or both? > > Thanks to the developers of EMC! And, thanks for any information offered. > > Regards, > > Bob
You can see what I have done so far here: http://www.wallacecompany.com/E45/rotor_cam.html I used a parallel port program that allowed setting parallel port pins. I had a shell script loop the parallel port utility the number of times needed to get to a position. There is no feed back, but I would occasionally reset the home position by running against a stop. The shell script could be interrupted by other processes, but this didn't seem to matter much. ----------- Kirk http://www.wallacecompany.com/machine_shop/ ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
