not a critique the man asked for something else Stuart Stevenson wrote: > note the wiki page - critique as necessary :) > > On Fri, Oct 24, 2008 at 6:56 PM, tomp <[EMAIL PROTECTED]> wrote: > >> Kevin >> >> please read the information that was suggested closely >> >> you said >> >> If I were able to use an encoder on the z-axis for position control >> and >> one on the motor (not directly coupled to the axis) for velocity control, >> >> >> i think the ini file that was suggested has BOTH encoders connected as >> position feedback >> that is a complexity that you may not want ( one adjusting backlash or >> cosine err of other) >> >> i do not think the suggested ini will use the rotary for 'just velocity >> control' >> >> this is further confused by referring to encoders versus linear encoders >> both linear and rotary are encoders, >> its just a few more letters to say exactly what you mean. >> unfortunately this naming is common in CNC >> >> what you described (imo) uses linear encoder feedback in the CNC PID loop >> but >> uses the rotary feedback in the amplifier's velocity loop ( the CNC is not >> aware of the rotary ) >> >> if you connect the rotary encoder to a suitable amplifier and DO NOT pass >> the rotary encoder back to >> the CNC, then you are on the right path. You WOULD pass the linear directly >> to the CNC. >> >> maybe you want other wise but you describe a fairly common scenario. >> >> best o luck >> tomp >> >> >> >> ------------------------------------------------------------------------- >> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge >> Build the coolest Linux based applications with Moblin SDK & win great prizes >> Grand prize is a trip for two to an Open Source event anywhere in the world >> http://moblin-contest.org/redirect.php?banner_id=100&url=/ >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> >> > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > >
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