Fault Phenomenon: Comedil tower crane after rotating beyond the limited number of turns, the limit switch did not cut power, causing the cable to twist.

Troubleshooting Process:
– Checked swing limit gear: gear slipping.
– Checked micro switch: switch contacts burnt.
– Adjusted limit gear meshing, replaced micro switch.

Root Cause: The swing limit transmission gear slipped, failing to count accurately.

Required Parts: Micro switch, limit gear set.