I was worried about a phase-angle needing to be added in. I did read somewhere that the 8i20 adds this automatically but I wasn't sure. Sounds like that it does.
I will try direct commutation to the 8i20 and report back. On Mon, May 11, 2020 at 4:43 AM andy pugh <[email protected]> wrote: > On Mon, 11 May 2020 at 01:18, Curtis Dutton <[email protected]> wrote: > > > Would be possible to use the encoder to output a rotor-angle directly to > be > > used with an 8i20 or other type drive thus removing the need for the bldc > > component when using the yaskawa motor. > > That can work, and one of the motors on my lathe is commutated exactly > that way. > > I am using Resolvers. > > If the resolver pole count matches the motor pole count and the > resolver is aligned to the motor, then this works: > > net z-angle hm2_5i24.0.resolver.01.angle hm2_8i20.0003.angle > > (You will note that I am using the option to address smart-serial > devices by their serial number, and that I have one of the very first > 8i20s) > > For the X axis, where nether condition is true, I use bldc to adjust > for pole count differences and offset. > > net x-counts hm2_5i24.0.resolver.00.rawcounts => bldc.0.rawcounts > setp bldc.0.scale -16777216 > setp bldc.0.poles 8 > setp bldc.0.encoder-offset 1700000 > net x-angle bldc.0.rotor-angle hm2_8i20.008d.angle > > > > > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is > designed for the especial use of mechanical geniuses, daredevils and > lunatics." > — George Fitch, Atlanta Constitution Newspaper, 1912 > > > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers > _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
