On 4 May 2012 05:40, Jon Elson <el...@pico-systems.com> wrote: > Peter Homann wrote: > > Jon, > > > > IIRC correctly the pre CPLD drives did not have full step morphing. Also > the > > new drives have a much improved recirculation sequencing. This means > that heat > > sinking requirements for the drives are greatly reduced. > > > Right, I agree about the recirculation change, but I seem to recall that > the > full step morphing was mentioned a LONG time ago. My memory could > be faulty on that, too. > > Also the advantage of the CPLD design is that it makes it harder to > reverse > > engineer the drives, as the Chinese did with the old one some years ago > > > Well, I hope so, as Mariss deserves a break on the copying of his work. > I've heard > rumors that the readback protection on the Xilinx parts could be > defeated with some > effort. I have no idea how easy or hard that might be. > > Jon >
If the drive is controlled by a micro, it's easy. It can generate any waveform you like.. Considering that one only needs to store a wave profile 0 to 90deg, you could have have 10 tables if you like, and choose according to step-step interval time. Regards Roland ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
