tomp wrote: > you mention a 'dumb' driver > anything you know of for AC drives? > i've done this with lots of copley's > but those were dc brushed amps > I have my $150 PWM brushless servo amps, which can be driven by my universal PWM controller. The amp just delivers supply voltage x the PWM duty cycle to the motor, unless current reaches the limit value. So, it is a REALLY "dumb" amp, no torque control loop, no sinusoidal drive, no encoder input. it does need commutation signals. I've driven Giddings & Lewis, Pittman, Servo Dynamics and Panasonic motors with excellent results. I've tried a few others with mixed results, mostly a lot of motor vibration, due to the six-step drive. See http://pico-systems.com/acservo.html for more info.
Jon ------------------------------------------------------------------------- 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
