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← TechnologyWhich risk increases when sensor calibration drifts within robotic arm PLC control?
A)Excessive positional hunting oscillations occur✓
B)Direct joint drive motor over-torque
C)Encoder signal phase angle distortion
D)Communication bus arbitration time-outs
💡 Explanation
Positional hunting occurs because sensor data deviates from actual position, causing the PLC to constantly adjust. The closed-loop **negative feedback** drives increased oscillations. Therefore, hunting occurs rather than a static error, because the system actively seeks the target.
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