On Mon, 13 Apr 2009 21:48:40 -0500, you wrote:
>I just ran several pieces at 12 TPI, using a program derived from the >EMC sample program threading.ngc Have you tried with plain Gcode? That is a horribly complex piece of code and it's possible the error may be associated with the math involved. I think the math is trying to do constant volume cuts, but I certainly wouldn't do that on the fly. It would be easier to see where the error lies if the code was a series of lines, at least you can then narrow it to a particular move, or not, as the case might be. > So, >does anyone else have experience with lathe threading or rigid tapping >at 12 or less TPI? I don't see why that should matter to the encoder >counter reset on index function, but that is what Mr. Harris reports. I've run many 1.5 and 2mm pitch threads in testing over the last few days without any problems. My encoder count is much less though at 90 ppr and spindle speeds tried have been 500 to 1000 rpm. Steve Blackmore -- ------------------------------------------------------------------------------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
