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 > >
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