At 11:21 AM 7/28/2008, you wrote: >I am a "servo bigot", and just don't want to do anything like >machining metal while "flying blind", which is how I think of >stepper systems. > >Jon
Personally I would go one step farther. I want torque or velocity mode system and not a position mode (step/dir) motion control system. With the position mode system be it a stepper or a servo with a step/dir driver the motion control loop is just assuming that the hardware is keeping up. Even if the driver outputs a following error signal and it is connected back to the motion controller it is generally just a digital signal so it cannot know when it is getting close, it only knows after the error has been tripped. Steppers have there place, but if you have to put a bunch of stuff (anti-resonance circuits, micro stepping, no motion power down etc.) into the controller to get one to work like a servo motor why not just use a motor. __________ Andre' B. Clear Lake, Wi. ------------------------------------------------------------------------- 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
