Hi Roland. EMC2 is capable of generating quadrature output. Some industrial stepper drives accept quadrature input, but none of the lower cost industrial (Gecko) or hobby-grade (pminmo, xylotex, etc.) do as far as I know.
It is a good idea, especially with software step genertion - it doubles the maximum step rate from the computer since only one transition is needed per step. - Steve Roland Jollivet wrote: >(second send,..) > > >Hi list > >Concept query; >Looking at stepper drives, the general format seems to be 4 phases out, or >Dir+Step, obviously saving two I/O lines. > >So why isn't a two phase signal used?. A 'quadrature' output? >- you still use two lines >- less worry about pulse duration >- transmission line speed requirement is slightly eased as the lines step >alternately >- it applies equally to stepper or DC servo drives >- there is no(or less) problem of timing error on direction reversal since the >signal changes are 'slow' at this point > >Maybe this is common, or what did I miss? > >Regards >Roland Jollivet > > ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
