Tomp, I answered the question (and I quote "Where can I find information on using two encoders on an axis?"). I hope the wiki page is found useful. thanks Stuart
On Fri, Oct 24, 2008 at 11:21 PM, tomp <[EMAIL PROTECTED]> wrote: > 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 >> >> > > > ------------------------------------------------------------------------- > 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
