Kevin please read the information that was suggested closely
you said If I were able to use an encoder on the z-axis for position control and one on the motor (not directly coupled to the axis) for velocity control, i think the ini file that was suggested has BOTH encoders connected as position feedback that is a complexity that you may not want ( one adjusting backlash or cosine err of other) i do not think the suggested ini will use the rotary for 'just velocity control' this is further confused by referring to encoders versus linear encoders both linear and rotary are encoders, its just a few more letters to say exactly what you mean. unfortunately this naming is common in CNC what you described (imo) uses linear encoder feedback in the CNC PID loop but uses the rotary feedback in the amplifier's velocity loop ( the CNC is not aware of the rotary ) if you connect the rotary encoder to a suitable amplifier and DO NOT pass the rotary encoder back to the CNC, then you are on the right path. You WOULD pass the linear directly to the CNC. maybe you want other wise but you describe a fairly common scenario. best o luck tomp ------------------------------------------------------------------------- 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
