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← TechnologyWhich risk increases when a quadrature encoder fails on joint 4 of an industrial robot arm performing repetitive welding tasks?
A)Cumulative positional deviation increases✓
B)Spontaneous combustion of adjacent surfaces
C)Back-EMF feedback oscillations amplify
D)Torsional stress in joints decreases
💡 Explanation
Increased risk of cumulative positional deviation occurs because the controller relies on quadrature encoder feedback for accurate joint positioning via closed-loop control. Because joint position is not reliably tracked, positional errors accumulate rather than being corrected with each cycle.
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