Calibrating a mobile crusher is essential to ensure optimal performance, accurate product sizing, and safe operation. Below is a step-by-step guide for calibrating key components of a mobile crusher:
1. Safety Precautions
– Turn off the crusher and disconnect power before calibration.
– Wear appropriate PPE (helmet, gloves, safety glasses).
– Lock out/tag out (LOTO) the machine to prevent accidental startup.
2. Check Mechanical Components
– Inspect wear parts (jaws, liners, blow bars) for damage or excessive wear.
– Ensure belts, chains, and bearings are properly tensioned and lubricated.
– Verify that hydraulic systems have no leaks and pressure levels are correct.
3. Calibrate the Feeder System
– Ensure the feeder speed matches the crusher’s capacity.
– Adjust vibration settings (if applicable) to maintain consistent material flow.
– Check sensors (level probes, proximity switches) for proper function.
4. Adjust Crusher Settings
# Jaw Crushers:
– Set the closed-side setting (CSS) using shims or hydraulic adjustment.
– Measure with a CSS gauge or feeler gauges between jaw plates at the discharge point.
# Impact Crushers (HSI/VSI):
– Adjust rotor speed (RPM) based on desired output size.
– Check blow bar alignment and gap settings.
# Cone Crushers:
– Calibrate the eccentric bushing and adjust CSS via hydraulic system.
– Verify tramp release system functionality.
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5. Calibrate Control Systems
– Verify PLC/HMI settings for correct operational parameters.
– Test emergency stop functions and interlocks.
– Ensure load sensors and pressure transducers provide accurate readings.
6. Test Run & Fine-Tuning
+ Run empty first to check for abnormal noises/vibrations.
+ Gradually feed material while monitoring:
– Product size distribution (sieving if needed).
– Power draw (should not exceed rated capacity).
– Throughput consistency.
+ Adjust settings as needed to meet specifications.
7. Documentation & Maintenance Logs