On 12/05/2013 09:35 PM, Leonardo Marsaglia wrote: > 2013/12/5 Jon Elson <el...@pico-systems.com> > >> Is this a flux vector drive, or a standard VFD? A >> flux-vector drive can >> perform the computations to keep the rotor excited without >> moving >> it. A standard VFD cannot, it has to move the motor to >> excite the >> induced field in the rotor. So, it will keep "dancing". >> > It says that is a FOC (field oriented control) ac drive, so I guess it's > not a standard VFD. Anyway it has a lot of options even an autotunning > feature so may be I'ts not well configured to get the maximum out of it. > Now I have set it to work only with +/- 10 volts and without any > acceleration or breaking assistance, so all the acceleration a deceleration > it's done by the PID of LinuxCNC. Ah, then do the autotune and turn off most of the PID features in LinuxCNC. Don't use any I, a low P value and just a little D, and no FFx. Let the drive do most of the hard work. You will probably need to redo the autotune when the motor is connected to a load.
Jon ------------------------------------------------------------------------------ Sponsored by Intel(R) XDK Develop, test and display web and hybrid apps with a single code base. Download it for free now! http://pubads.g.doubleclick.net/gampad/clk?id=111408631&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
