On Tue, Oct 02, 2007 at 02:20:26PM -0500, Sam Sokolik wrote: > the only other thing I can think of is that the max step/sec is a bit on the > low side. But I don't know a good safe step rate to put on paper. (~20k/s > w/Parport) - expecially because 2.2 will have doublefreq which will increase > the step rate a bit more.
A ~108kHz square wave on a standard PC parallel port, produced by emc "TRUNK" and captured on a scope: http://emergent.unpy.net/index.cgi-files/sandbox/img_7714-medium.jpg the scope measured the period as 9.182uS (but this figure varied as the scope ran); the pc says the period should be 9.219uS. This was not a "full" emc; it was the simplest hal configuration that will toggle an output pin at high rate: loadrt threads name1=fast period1=10000 fp1=0 loadrt hal_parport cfg=0x378 addf parport.0.write fast addf parport.0.reset fast setp parport.0.pin-02-out 1 setp parport.0.pin-02-out-reset 1 start Jeff ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. 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