Hello everyone. I had this on the forum for a while: This question goes out to any "servo loop" experts out there in EMC2 world. I understand that EMC2 uses PID to form a control loop when using servomotors, but . . . what if you use a drive that already has its own loop? For example, my machine uses Yaskawa SGM-0xA31x series servos, Yaskawa SGDA-0xAS series analog drives, and a Pico Systems PPMC (ENC, DAC, DIO) interface.
These drives receive the encoder signals and redirect them to the PPMC ENC card, but have their own PID terms which are set during Autotuning. So is it loop or loops? What effect do the PID terms in the EMC2 *.ini file have? I am using just the P term right now and it works. The motors move OK, but I would like to know HOW. Like what is an optimal value for the P term? Is HALscope the right tool for this? If I use values in the other terms will this form a second nested loop? Is that better? What about other INI entries like DEFAULT_ACCELERATION, etc? Sorry if this has already been covered before, but I couldn't find it. There is a lot more stepper info out there than servo. Thank you, and by the way . . . EMC2 is awesome! servo newbie getting loopy ________________________________ This communication is for the use of the intended recipient only. It may contain information that is privileged and confidential. If you are not the intended recipient of this communication, the disclosure, copying, distribution or use hereof is prohibited. If you have received this communication in error, please advise me by return e-mail or by telephone and then delete it immediately. ------------------------------------------------------------------------------ This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
