ON 20110310@3:13:10 PM at page: On a web page you were interested in at: http://techref.massmind.org/Techref/io/steppers.htm#40612.6341435185 James Newton[JMN-EFP-786] See also: http://www.daycounter.com/Calculators/Stepper-Motor-Calculator.phtml Calculates max stepper speed from Steps per revolution (S), Inducance (L), Voltage (V) and max Current (I) as RPM = [V/(L*2*I)]/S ERROR: Can't email. At least one recipient is required, but none were found.