Hello to all! I just managed to turn the second motor of my machine (another AC motor with a Powerflex 40 drive) and works just fine for positioning the part. Tomorrow I'll be uploading some videos.
Although I need to do some fine tuning on both the rotary and the linear axis I was thinking about a concept to improve the accuracy of the servo loops. As I have seen on many machines including the Mazak that we have here, the servo systems close the velocity loop within the servo drive, and then the CNC applies a voltage to control the velocity of the motor based on the PID of the position loop. So as I see it, it's like there is one pid nested inside the other, or sort of. Now the VFDs that I'm using can close the velocity loop but I would have to use a special module for that. My question is, based on your experience. Could this improve the accuracy of the joints? I guess this could be done within LinuxCNC without closing the loop on the VFDs. Thanks as always for your help!! -- *Leonardo Marsaglia*. ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
