Jeff Epler wrote: > When you set pluto-servo.pwm.#.pwmdir TRUE, the output should be what you > call "sign-magnitude": > value after scale+offset PWM Dir > 0.0 0% FALSE > 0.5 50% FALSE > 1.0 100%* FALSE > -0.5 50% TRUE > -1.0 100%* TRUE > > * may be reduced by max-dc paramter > > In emc2 versions 2.2.0 through 2.2.3 there was a bug in the pluto > drover's pwmdir mode that rendered it completely broken. It should be > fixed in 2.2.4 and newer. > > When in the default mode (pwmdir FALSE), the output is: > value after scale+offset Up Down > 0.0 0% 0% > 0.5 50% 0% > 1.0 100%* 0% > -0.5 0% 50% > -1.0 0% 100%* > > * may be reduced by max-dc paramter > > There is no way to modify the PWM frequency of the pluto without > recompiling the firmware. > WOW, Dr. Eppler, I believe you have a DIAGNOSIS! With a negative command into the driver, it looks like synchronous antiphase! Kirk, can you check if the heating problem is only showing up in one direction? it also ought to have a non-symmetrical response. 50% command should give 50% velocity for a + input value, and the minus valuses should go from -100% speed to +100% speed, with a command input of -0.5 giving zero speed.
Jon ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
