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D.C. Position Servo System Trainer Unit

SKU: 2007 Category:

DC position Servo System Demonstration Unit is a versatile self – contained stand – alone demonstrator, useful in the study and demonstration of the principle and working of a DC position Servo System. It consists of a common potentiometer with calibrated dial as master or input transducer and a rebalance potentiometer to convert output position into a voltage signal along with specially designed DC motor with suitable coupling, feedback patch, summing amplifier, preamplifier and power amplifier. Various controls for different parameters are provided It is a highly accurate, highly sensitive demonstrator with good repeatability, linearity and fast response. The unit is housed in an elegant cabinet with a well spread intelligently designed circuit layout on the front panel. Multi – coloured test points are provided at various stages in the circuit to observe waveforms and voltages. It is strongly supported by a comprehensive instruction manual complete with theory & operating details.


  • Principle : DC Position Servo System
  • Displacement : Angular (00 to 2700)
  • Input Transducer : Command or master potentiometer with calibrated dial (00 to 2700)
  • Motor : Specially designed bi – directional, geared, permanent magnet armature controlled DC motor.
  • Coupling : Suitable coupling of motor to output re – balance potentiometer.
  • Amplifiers : Summing amplifier of adjustable gain pre – amplifier and power amplifier for driving DC on basis of error signal.
  • Amplifier Gain : Controlled by the Voltage signal derived by the conversion of the output position of rebalance potentiometer into voltage signal.
  • Output : Slave dial coupled to the servo mechanism and mounted with calibrated dial (00 to 2700).
  • Controls : 1. Master or command potentiometer.
    2. Potentiometric for zero adjustment.
    3. Potentiometric for span adjustment to adjust the minimum (lower limit) & maximum (upper limit) of angular displacement.
    4. Potentiometric for gain adjustment.
    5. Servo Motor ON / OFF control.
    6. Mains ON / OFF.
  • Indicators : 1. Nullmeter ( Digital 3.5 Digit )
    2. Servo Motor ON / OFF.
    3. Mains ON / OFF.
  • Test Points : Provided at various stages in the circuit to observe waveforms and voltages.
  • Power Requirements : 230V,  10% AC, 50Hz, 1f
  • Standard Accessories : Detailed Instruction Manual.


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