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Tech Topic

MOTORS. Tech Topic. Need a Motor That is Capable of Moving the Mirrors to a Fairly Precise Angle. pROBLEM. DC Motor Servo Motor (DC) Stepper AC Motor. Motor Types. Price Range $1.50 Thru -- Ease of Interface Need an Encoder or Potentiometer to Ensure Correct Angle

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Tech Topic

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  1. MOTORS Tech Topic

  2. Need a Motor That is Capable of Moving the Mirrors to a Fairly Precise Angle pROBLEM

  3. DC Motor Servo Motor (DC) Stepper AC Motor Motor Types

  4. Price Range $1.50 Thru -- Ease of Interface Need an Encoder or Potentiometer to Ensure Correct Angle An H-Bridge is Needed to Run This DC Motor

  5. Price Range $10 Thru -- Performance Low Torque = Low Current = Efficient Fairly Precise Angle Choice Ease of Interface Do Not Need an Encoder or Potentiometer to Ensure Correct Angle. Pulse Width Determines Angle (All Inclusive) Need PWM Servo motor

  6. Price Range $20 Thru -- Performance Very Precise Angles, Must be Monitored Externally (Unless Intelligent Stepper Used) Very Low Torque Ease of Interface Similar to Servo, If Encoder or Potentiometer Used Requires Building or Buying a Motor Driver That “Knows” What Angle It Is At Stepper motor

  7. Price Range $20 Thru -- Performance Usually Large and Heavy Last A Very Long Time Generally Made For One Speed Ease of Interface Encoder or Potentiometer Required Requires Building or Buying a Variable Frequency Controller (Not as common) AC motor

  8. Torque • Precision • Ease of Controlling • Price/Performance Properties

  9. 1-5 Ratings Each Property Weighting is Listed Below it Comparison chart

  10. Motor Choice DC Servo Motor Reasons Simplicity (Already a “Smart” Device) More Than Enough Torque Small Sized and Only Three Wires (Saves Space) Initially More Expensive But Do Not Need Additional Sensors Conclusion

  11. questions

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