Frank Tkalcevic wrote: >> I have a very well-hidden article on tuning. >> > > Excellent. And very well hidden. Every week I seem to accidentaly find a > great article on the emc web site. > > >> See http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?PWM_Servo_Amplifiers >> > > > How do you generate your step pulses? When I was tunning, I would keep the > machine on and do an MDI move. This doesn't work too well when the tuning > is so bad it faults when you enable the machine. > These are not "steps", they are the usual trapezoidal ramp-up, coast, ramp-down of a manual jog. A program that did : G01 X1 F25 X0 (repeat) would accomplish the same thing, of course. I usually just do it manually.
Actually, this suits me better than a real step. You get 4 distinct regions (stationary, accelerating, running at constant velocity, and decelerating). Each has little differences in behavior (like the accel and decel have friction and mass working in opposite directions on them) and you want all 4 regions to have minimal following error. Jon ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
