----- Original Message ----- From: "John Kasunich" <[EMAIL PROTECTED]> <snip> > Are you sure you really need to close the speed loop? Or would it be > sufficient to simply send the appropriate command to the VFD? > "Appropriate" means that it has been corrected for the gear ratio for > whatever gear you are in at the moment.
I probably don't need closed loop spindle speed control, I just thought since I have the encoder, and two unused axis available, why not! After spending some time reading the hal documentation tonight I got an idea that might work. What if I used HAL's integrator with commanded_speed - feedback_speed_IN with limits of something like 500rpm/sec acel and 300rpm/sec decel. I think that would command my spindle drive to accelerate at 500rpm per second until it reached the commanded rpm and decelerate at 300rpm/sec until it reached the lowered commanded rpm. Any thoughts? Would this work? Other thought is to use the multiplexer and select a gear ratio that would best fit the desired SFM. Thanks! Roger Neal ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
