On 1/31/2014 7:41 AM, andy pugh wrote: > On 31 January 2014 05:30, Dave Cole <linuxcncro...@gmail.com> wrote: > >> http://www.automationtechnologiesinc.com/wp-content/uploads/downloads/2014/01/2-Quadrant-BLDC-speed-driver-ver.-48ZWSK50-B-804-1.pdf > It _looks_ like a conventional velocity-controlled servo drive (though > I actually think it will be working in current mode). > > So, with PID in HAL, it ought to work just fine for position control. >
If that drive follows these design ideas then I don't think you can do effective servo control with a 2 quadrant brushless DC drive. This document has some explanation as to why. Siemens always told us that 4 quadrant control was a requirement for effective controlled positioning - ala servo control. Here is an old TI app note. http://www.ti.com/lit/an/slua083/slua083.pdf Dave ------------------------------------------------------------------------------ WatchGuard Dimension instantly turns raw network data into actionable security intelligence. It gives you real-time visual feedback on key security issues and trends. Skip the complicated setup - simply import a virtual appliance and go from zero to informed in seconds. http://pubads.g.doubleclick.net/gampad/clk?id=123612991&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
