Oh man, I feel your pain - that midnight alarm with the boss watching is the worst! Here's my systematic approach when Error 730 hits:

1. First, don't panic - take a breath. Check the servo drive's fault history log to see if this is a recurring pattern or a sudden event. Look for any recent parameter changes or maintenance records.

2. Electrical check: Verify your power supply voltage matches the drive specs exactly. Use a multimeter to check for voltage drops during operation. Look for loose connections, damaged cables, or ground faults that might be causing intermittent issues.

3. Parameter audit: Review your current limit settings - sometimes they get accidentally changed. Check acceleration/deceleration times - if they're too aggressive, the motor can't keep up. Verify the motor type and encoder settings match what's actually installed.

4. Load analysis: Monitor the actual current draw during operation vs. the rated capacity. Use the drive's monitoring tools to see if the overload happens at specific positions or speeds. This can point to mechanical issues like worn bearings or misalignment.

5. Thermal check: Feel the motor and drive for excessive heat. Overheating can cause false overload readings. Check cooling fans and ventilation.

6. Encoder/feedback verification: Bad encoder signals can make the drive think it needs more torque than it actually does. Check encoder connections and signals.

7. Regeneration circuit: If you have rapid deceleration, check the braking resistor and regeneration circuit - a failed resistor can cause overload faults.

The key is working systematically from electrical to mechanical, simple to complex. Document each step so you can show the boss you're being thorough, not just guessing! Good luck - you've got this!