This is a HarmonicDrive FHA-40C-100-250E It has 4 wire encoder cable and a 7 wire motor cable which includes power in and hall output. Some models such as the 250US or 250D have quadrature output. Thanks for the suggestions. The driver I have has various options for drive and feedback, it just doesn't have the serial mode. I think I will try the speed mode. Another thought is to attach a separate encoder to provide feedback. These are hollow shaft drives which make them nice for rotary axis use. I am hoping to determine the mode so it can be passed on to the open source STMBL project rather than depending on used drivers.
On 4/8/17 1:38 PM, Jon Elson wrote: > On 04/08/2017 11:52 AM, Chris Albertson wrote: >> Some place inside that encoder is a normal quadrature signal. Likely >> right at the phototransistor. If you could find it and buffer it >> then you have a conventional motor that is easy to interface. > Well, in the case of the Fanuc serial encoders, the raw > quadrature is a sine wave of much lower resolution. > The encoder chip interpolates that up by a factor of 16 to > 500. Also, these are AC motors, so you need a commutation > output as well as the quadrature. > > Jon > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
