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← TechnologyWhich outcome results when a robot arm's joint encoder fails entirely during a programmed multi-point move?
A)Unpredictable tool path deviation✓
B)Reduced motor torque production
C)Increased current draw on power
D)Complete system-wide emergency shutdown
💡 Explanation
A failed encoder prevents the PLC from accurately determining joint position for inverse kinematics, because it disrupts the feedback loop necessary for precise motion control. Therefore the tool deviates, rather than completing the programmed path, or causing a protective shutdown through alarm monitoring.
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