----- "Ian R Upton" <upt...@pacific.net.au> a écrit : > Gentlefolk, > > Thanks for all the comments and suggestions. > > Back looking at the basics. How do I know the motor is 50 > steps/rev??? > > The motor is an Epson EM-257 which I have not been able to find much > about on the Internet. > > I held the shaft of the motor and rotated it carefully. 50 "steps" > (harder movements) per rev. > > Originally the thing seemed to go beserk when run at 200 steps/rev. > But > this may have been effected by my early settings, excess current, > velocity, etc. > > I have just set the steps/rev to 200 and am now starting to fiddle > current, velocity, etc. Looks encouraging. > > So how do I determine the number of steps per rev accurately?? > > Ian >
Try sending pulses manually to your driver input, with a pushbutton switch, with the driver set for full-step, and you can count precisely how much pulses you need to do a full rev. Maybe you will need something a bit more complicated than a simple switch, for example adding a RC filter to cut commutation problems of your switch (because often the commutation is not "clean", and for one pulse you give may have more than one electrical pulse. ) But try with a simple switch, if it's a good quality one, will work out of the box :) ------------------------------------------------------------------------------ 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
