Discussion
True or false: a servo motor is simply an ordinary motor with feedback added.
Answer: D
Correct answer: False, since it is designed for low inertia and a linear characteristic
Fitting an encoder to an ordinary machine gives feedback but not the dynamic response a servo application needs. A servo machine is built for the purpose - a long slender rotor for low inertia, a linear torque-speed characteristic, high peak torque and a construction that tolerates rapid reversal.
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