We used .001mm scales in our servo system its "ok" but we are going to use encoders on the next mill we make. issues with the velocity feedback are the root cause I think, any backlash at all will make it hunt at full power.
the best option is to use both, use motor encoders for velocity and linears for position I think. On 17/04/13 13:37, Gregg Eshelman wrote: > Would a 0.0002" or 0.00005" resolution linear magnetic scale be good enough > to use instead of a servo encoder? > > Still trying to get the guy with the Acra mill in need of a bunch of TLC to > sell it for what it's worth as-is, not for what it'd be worth if it was in > working order? > > The old Anilam Crusader M system uses tachometers and glass scales so any > reason LinuxCNC couldn't use magnetic scales of higher resolution? > > Seems to me that it'd be easier to read the actual position of the table and > quill rather than inferring it from how many revolutions the motors have > turned. > > ------------------------------------------------------------------------------ > Precog is a next-generation analytics platform capable of advanced > analytics on semi-structured data. The platform includes APIs for building > apps and a phenomenal toolset for data science. Developers can use > our toolset for easy data analysis & visualization. Get a free account! > http://www2.precog.com/precogplatform/slashdotnewsletter > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
