1. Preventive Maintenance Essentials
Daily Checks:
Inspect roller mills for abnormal vibrations or overheating (bearing temps should stay below 70°C)
Verify sifter screen tension (50-60N/cm) and clean inspection windows
Check conveyor belt alignment (±10mm tolerance) and scraper contact
Weekly Tasks:
Lubricate all bearings with food-grade grease
Test emergency stop systems and safety interlocks
Clean magnetic separators using non-metallic brushes
Monthly Procedures:
Measure roll corrugation depth
Calibrate weighing systems
Inspect dust collector filters
2. Common Faults & Immediate Actions
Roller Mill Issues:
Symptom: Uneven grinding
Solution: Adjust roll gaps (0.1-0.3mm for reduction rolls)
Symptom: Bearing overheating
Emergency Protocol: Shut down immediately, check lubrication
Sifter Problems:
Symptom: Reduced throughput
Diagnosis: Check for blinded screens (>15% coverage)
Fix: Use compressed air cleaning (≤4bar pressure)
Pneumatic System Failures:
Symptom: Material buildup
Check: Air velocity
Prevention: Install moisture sensors
3. Safety-Critical Reminders
Lockout/Tagout before any maintenance:
Isolate all energy sources
Use personal locks
Verify zero energy state
Dust Explosion Prevention:
Ground all equipment
Maintain dust accumulations <1/32 inch
Confined Space Entry:
Test oxygen levels (19.5-23.5%)
Use harness systems
Pro Tip: Keep these critical spares on hand:
Roller mill belts
Sifter screen panels
Motor couplings
