> Message: 5 > Date: Sun, 31 Aug 2008 00:55:19 -0500 > From: Karl Schmidt <[EMAIL PROTECTED]> > Subject: [Emc-users] EMC2 capabilities > To: [email protected] > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > I'm new to EMC2 and I was reading I saw: > >> The motion control can operate true servos (usually analog) with the >> feedback loop closed by the >> EMC software at the computer, or open loop with "step-servos" or stepper >> motors. > > I'm wondering - does anyone actually use it this way? Can EMC2 do Dual loop > control - with a drive > encoder and table encoder? > > I'm also looking for a hardware compatibility list(HCL) for EMC2 ... if > someone can point me in that > direction. > Karl, Dual loop control is like my machine at www.mpm1.com:8080/GandL/configs/18-feb-2008/ This machine combines encoders on the motors and a scale on the table. Download the configuration files and examine them. The configuration files show combining the feedback from two sources to tune the motor for control and accuracy. The X axis is the one to look at. The file GL_servo.hal show the pid.0.xxx and pid.4.xxx being combined. The pid.0.xxx is connected to the encoder on the motor. The pid.4.xxx is connected to the feedback from the scale. Notice the Igain on pid.0.xxx is zero and the Igain on pid.4.xxx is the only non zero component of that pid loop. These are combined with a sum component for feedback to the control ie.
net Xoutput-motor pid.0.output sum2.4.in0 net Xoutput-linear pid.4.output sum2.4.in1 linksp Xoutput <= sum2.4.out The GL.ini is the first configuration file. All configuration starts there and all other configuration files are called from within this file. Stuart ------------------------------------------------------------------------- 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
