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← TechnologyWhich control failure commonly results when industrial robot joint encoder pulses are lost?
A)Runaway motion on affected axis✓
B)Reduced pneumatic gripper force
C)Inconsistent welding arc strength
D)Increased susceptibility to EM interference
💡 Explanation
Encoder pulse loss disables position feedback, halting closed-loop control; therefore, the servo motor receives commands with no corrective response. Because Proportional-Integral-Derivative (PID) control is lost, runaway motion happens rather than controlled movements or weaker performance involving peripheral tools.
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