We are making some progress on getting our servo system to run with the Granite Devices step/dir drives. A nice feature that the Granites' have is a homing feature which lets us push with low torque into a fixed stop and then move a fixed distance off that stop and then (optionally) find an index pulse. It seems to be very repeatable.
There is a input bit we toggle to initiate the Granite drive to begin homing. During homing there is an output from the Granite that goes true while in process of homing. Once homed that latter signal goes back to the false state. Now, on our Y axis where we have two motors driving one axis using gantrykins, we will want to have the Granite home both axes simultaneously and then have EMC find one of the two index pulses on that axis (while moving both motors obviously so no racking occurs). The question is is it possible to send a signal to the Granite to home and during this time have EMC ignore the fact that it isn't controlling the motors and that there would be (potentially) a lot of following error? Then, tell EMC (for the Y axis anyway) find the index pulse on one joint and call that home? -Tom ------------------------------------------------------------------------------ The demand for IT networking professionals continues to grow, and the demand for specialized networking skills is growing even more rapidly. Take a complimentary Learning@Cisco Self-Assessment and learn about Cisco certifications, training, and career opportunities. http://p.sf.net/sfu/cisco-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
