What Factors Can Cause A Cable Granulator Machine To Overrun?
Sep 24, 2025
1. Electrical System Factors
1. Power Supply Abnormality
Voltage fluctuations exceeding ±10% or frequency deviations (e.g., 50Hz ±2Hz) can cause unstable motor loads, abnormally high currents, and delayed overload protection.
2. Control Component Faults
Contactor contact erosion, relay signal delays, and other issues can cause abnormal start command execution, extending run time.
2. Mechanical Load Issues
1. Tool Wear and Screen Clogging
Tool wear (SKD-11 alloy cutters require sharpening every 150 hours) or screen clogs (copper granule purity drops below 95%) can increase mechanical resistance, causing the motor to continuously overload.
2. Bearing and Drive System Faults
Bearing wear (radial vibration > 2.8mm/s) or loose couplings can increase frictional resistance, causing motor current to increase by more than 15%. III. Operational and Environmental Factors
1. Improper Feed Control
Overfeeding (exceeding 20% of rated load) or failure to adjust the run time for high-hardness materials (such as automotive wire) (should be shortened to 6 hours per cycle).
2. Cooling System Failure
Dust accumulation on the motor heat sink (temperature rise > 75°C) or water circulation failure in wet-type machines can cause the equipment's overheating protection to fail.
IV. Inadequate Maintenance
1. Inadequate Lubrication
Bearing lubrication intervals exceeding 200 hours (lithium-based grease NLGI Grade 2) can accelerate wear and increase operating resistance.
2. Incorrect Parameter Settings
Setting the current limit too low or starting the machine for too long (e.g., >30 seconds) can falsely trigger the protective device.
