A Crawler Crane Load Moment Indicator (LMI) is a critical safety and operational system that monitors and calculates the crane’s load capacity in real time to prevent overloading.
Key Content Displayed by the LMI
Load Weight: Real-time weight of the lifted load.
Working Radius: Distance from the crane’s center of rotation to the load.
Boom Angle: Angle of the boom relative to the ground.
Boom Length: Extended length of the telescopic boom (if applicable).
Capacity Percentage: Ratio of actual load to the crane’s maximum capacity at the current radius/configuration.
Moment Calculation: Load × Radius (critical for stability).
Safe Working Load (SWL): Maximum allowable load for the current setup.
Wind Speed (optional): Some LMIs integrate anemometers to warn about high winds affecting stability.
Safety Features Enabled by the LMI
Overload Alarms: Audible/visual alerts when approaching or exceeding capacity limits.
Automatic Shutdown: Stops crane operations if limits are breached (configurable in some systems).
Two-Block Warning: Alerts if the hook block approaches the boom tip (prevents damage).
Data Logging: Records operational data for compliance and incident analysis.
Diagnostic Alerts: Flags sensor malfunctions or calibration issues.
Importance of Calibration
Sensors and the LMI system require regular calibration to ensure accuracy.
Calibration accounts for wear, environmental factors, and configuration changes (e.g., new counterweights).
More other product :
1. Side Boom Load Moment Indicator (Side Boom LMI)
Description: Designed for pipeline side boom cranes used in oil/gas or infrastructure projects to lift and position pipes.
Key Features:
Monitors load, boom angle, and radius during side-lifting operations.
Terrain compensation for slopes or uneven ground.
Overload alarms to prevent tipping during critical pipe-laying tasks.
Applications: Pipeline installation, trench work, and heavy material positioning.
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