Monday, November 1, 2010
Peak Servo Current Tests
Peak Servo Current Tests: "Measuring servo current with a multimeter or Wattmeter won't tell you how high the peaks get. For this you need an oscilloscope, which traces a graph of instantaneous voltage vs. time. To convert the servo current to a voltage, I made a current probe with a 0.1 Ohm resistor inserted in series with the servo's negative power lead. I set the 'scope input attenuator to 50mV/div, giving a display of 500mA per division. The servos were exercised with a servo tester set for slow rotation. This simulates the small movements that typically occur in flight."