There is atleast one person doing this.. Here is some light reading. (jlmjvm on #emc)
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Steppers_With_Encoders http://cnczone.com/forums/showthread.php?t=43517&highlight=encoders http://cnczone.com/forums/showthread.php?t=37309 This gives good info on speed the printer port can count. I was giving a safe speed (1/(base period))/2. It has been said you should be able to count (1/(base period+jitter)). This is assuming that the quadature output of the encoder is perfect. (Transitions are at 50% of the previous transition. http://cnczone.com/forums/showthread.php?t=53960&highlight=encoders sam ----- Original Message ----- From: "David Szakovits" <[EMAIL PROTECTED]> To: <emc-users@lists.sourceforge.net> Sent: Saturday, March 15, 2008 9:54 AM Subject: [Emc-users] encoders and stepper motors > hi, > i use gecko drives with 10 "micro steps" and i don't know if i ever lost > a step or not. i would like to add encoders to the back of my double > shafted stepper motors. i would like emc to stop all motors and report > any lost steps. i definitely don't want emc to try to make up for the > detected mistake. just want it to stop. > > these are my questions: > is this practical? > does emc support this? > what should i look for when purchasing encoders for this application? > how many positions/pulses per revolution will work best? > > i know this has been discussed many times, but i am ignorant and i > haven't really always fully comprehended the discourse. i have never > seen an encoder. > thanks > djs > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > > -- > No virus found in this incoming message. > Checked by AVG. > Version: 7.5.519 / Virus Database: 269.21.7/1329 - Release Date: 3/14/2008 > 12:33 PM > > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
