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#2
 
11-22-2003, 01:35 PM
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| Ohms law R=E/I where R is resistance, E = Voltage and I = current. For a simple example, a 12vdc pwer supply with an 8 volt motor rated at 1.2A and a driver that saturated at 1V the drop across the resistor would be 12 - 8 - 1 or 3 volts. 3 volts at 1.2A = 3/1.2 or 2.5Ohms. Power = E * I or 3 *1.2 = 3.6Watts. This is assuming you are not using a chopper driver.  |
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#3
11-22-2003, 01:45 PM
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| www.e-zflight.com/files/stepcalc102.zip This program figures out current limit resistors for steppers for you. Eric
__________________ I wish it wouldn't crash. |
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