2012/5/26 lloyd wilson <llwilso...@rochester.rr.com>: > > Now to the next level - I'm using a hall sensor to detect spindle rpm; I > get a clean low-going pulse each revolution, as expected. This is fed as > input to the A channel of a hostmot2 encoder (running in counter mode).
My apologies, if I am missing something, but the described behavior - one pulse per revolution - seems more like index signal. > The velocity output always reports as a negative number - consistent at > a given speed, larger abs. value at higher rpms, so it seems to be > properly following whatever algorithm it uses. How much does reported velocity differ from actual velocity? If index is linked to quadrature signal, then it should report _a lot_ slower than actual velocity, although it will scale up correctly any increase/decrease in velocity. -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ 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
