Kirk Wallace wrote: > Further investigation produced this document: > > http://www.wallacecompany.com/cnc_lathe/Servo_Schem.png > > , which seems to indicate that, these are indeed analog input servo > amps. If this document corresponds to your machine, I would be leery of using 35 year-old servo amps from a GE 550 control. A moderately old Servo Dynamics or Westamp transistor PWM amp can still perform pretty well. These SCR amps are bound to be limited to about 10 Hz bandwidth, and I'd REALLY hate to tune them with a modern control with a 1 KHz servo loop.
Ray and Matt used my PWM servo amps on it, and said it worked well. If you want to use those velocity servo amps, or if they are better than the original units that came with the GE 550, then you would want to use my PPMC board set with the analog outputs they need. Good velocity servo amps can give very smooth and accurate motion. Without them, I would suggest you want to have higher resolution on the encoders. Jon ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
