At 10:42 PM 4/15/2008, you wrote: >I am losing patience with the Bandit on my Shizuoka mill, so I am >thinking of converting to EMC2 sooner than later. I would like to save >the stepper drivers but they look like they might have a proprietary >integration with the controller. The drives have four inputs that appear >to take in steps as quadrature signals plus their complements; QB, >QA, /QB, /QA. > >QB ___|```|___|```|_ >QA _|```|___|```|___ >/QB ```|___|```|___|` >/QA `|___|```|___|``` > >... Darn, I just realized this will only work for the parallel port, >which is too slow. I guess, I need new step/direction drivers plus a >hardware clock generator. Unless someone knows of a clock generator with >quadrature outputs. > >For a stepper driver, what do I need to consider to make the best >integration with EMC2? > >My current drivers have a 45 V supply, 8 Amp limit, and 6 wires of which >two are labeled "common". The motors are not labeled and I don't know >how to determine the steps per revolution. > >I seem to recall the Geckos had a non-adjustable I in its PID tuning? > >I want to use limit and home switches, but I am used to homing on an >encoder index and I won't have an index. It seems that a switch alone >would not be accurate enough. I suppose I can add an index disk and >sensor. On the other hand, this is only important if you don't want to >touch off after powering up? > >It's time to hit the books, but any advise is appreciated.
Step direction to quadrature conversion can be done, not all that much of a circuit needed really. http://www.cnczone.com/forums/showthread.php?t=12066 __________ Andre' B. Clear Lake, Wi. ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
