If I remember correctly, the Quadrature signals will let the control step a motor twice as fast as step and direction. It might be worth a try before replacing your drives.
Roger Neal [EMAIL PROTECTED] ----- Original Message ----- From: "Kirk Wallace" <[EMAIL PROTECTED]> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Tuesday, April 15, 2008 10:42 PM Subject: [Emc-users] Bandit Steppers >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. > > -- > Kirk Wallace (California, USA > http://www.wallacecompany.com/machine_shop/ > Hardinge HNC lathe, > Bridgeport mill conversion, doing XY now, > Zubal lathe conversion pending > Craftsman AA 109 restoration > Shizuoka ST-N/Bandit CNC) > > > ------------------------------------------------------------------------- > 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 ------------------------------------------------------------------------- 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
