How Can I Tell If A Cable Granulator Machine Has Timed Out?
Sep 19, 2025
1. Runtime Monitoring
1. Timer Recording
A dry-type cable granulator machine is considered to have timed out if it runs for more than 8 hours, or a wet-type machine for more than 6 hours. It is recommended to install an intelligent timer that automatically locks the machine when the cumulative run time reaches a limit.
2. Load Current Detection
If the motor current continuously exceeds 15% of the rated value (e.g., a 5.5kW motor current > 13A), the machine is overloaded. A clamp ammeter is required for real-time monitoring. Abnormal fluctuations exceeding ±10% require immediate shutdown and inspection. II. Physical Status Assessment
1. Abnormal Temperature
Bearing temperature > 80°C (wet-type models > 60°C)
Casing temperature rise > 10°C within 1 hour
Lubricant oil emits a burning odor or smoke
2. Vibration and Noise
Radial vibration velocity > 2.8 mm/s
High-frequency squealing or periodic clicking sounds
Frequent loosening of anchor bolts
III. Protection Device Feedback
1. Overload Protection Triggering
When the thermal relay (set value 1.05-1.15 times the rated current) activates or the inverter reports an overload fault code, the equipment is overloaded.
2. Decreased Sorting Efficiency
Copper rice purity drops from 99% to below 95%, increasing the probability of screen clogging. Check tool wear (SKD-11 alloy knives require sharpening every 150 hours). Maintenance Record Review
Tool replacement cycle shortened to 100 hours (normally 150 hours)
Bearing lubrication cycle <200 hours (normally 200 hours/time)
Screen cleaning frequency increased (normally daily)
