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← TechnologyIn automated robotic welding, which consequence results when PLC cycle time exceeds encoder feedback rate?
A)Arc instability in the weld
B)Robot loses positional accuracy✓
C)Overheated servo motor windings
D)Inverter trips due to overcurrent
💡 Explanation
Positional accuracy degrades because the PLC's decision-making lags behind the actual joint positions reported via the encoder; this involves the *control loop delay* mechanism. Therefore, the robot becomes inaccurate rather than problems with welding parameters arising from arc instability.
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