It's not so much the 2.1 ohms, though that can be an indication of high inductance. It's the 9mH per phase that slows you down. If you take a quick look at the graphs in the following WIKI page:
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Stepper_Motor_Speed_Limitations they will give you a feel for what voltage/inductance/current combinations will limit full step torque to. I know it's not a direct speed equation, but it's helpful. looks like a 90V supply would take a little over 300uS to get that 9mH coil to 3A. 45V would take over 600uS and 30V around 900uS. 1 mS per step (rounded) is only 1000 steps per second (2.5 RPS or 150 RPM), and that's not even at full torque. For a fairly quick system I would look for less than 3mH per coil, preferring 2mH. > The stepper resistance looks a bit high at 2.1ohm/phase. You wont get much > speed on the supplied 24V psu. ------------------------------------------------------------------------------ Got Input? Slashdot Needs You. Take our quick survey online. Come on, we don't ask for help often. Plus, you'll get a chance to win $100 to spend on ThinkGeek. http://p.sf.net/sfu/slashdot-survey _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
