On Wed, 2013-03-27 at 22:43 -0500, Stuart Stevenson wrote: > Gentlemen, > If I am wanting to remove the servo tuning from a velocity loop would I > be able to jumper the +/- 10 volts to the tach feedback into the drive and > to the speed request into the drive. > Would this cause the drive to not respond? > Would this cause the drive the immediately output the full requested > current to the motor? > thanks > Stuart > Whoa! tach feedback is negative.... if it matches the input drive then you do not accelerate...i.e constant speed. Think of it as a summing junction on an op amp with the other input being the velocity voltage. I think I have that right even at my age. ;-)
This is what make velocity drives so easy to tune as opposed to torque drives. The tach feedback is a loop inside the velocity input. Dave ------------------------------------------------------------------------------ Own the Future-Intel® Level Up Game Demo Contest 2013 Rise to greatness in Intel's independent game demo contest. Compete for recognition, cash, and the chance to get your game on Steam. $5K grand prize plus 10 genre and skill prizes. Submit your demo by 6/6/13. http://p.sf.net/sfu/intel_levelupd2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
