Belt cleaning zone.

The belt cleaning zone starts where material begins to discharge from the belt and ends where the belt is no longer accessible from the discharge side — typically several belt-widths past the head pulley along the return path. Inside this zone, all carryback-removal equipment is installed: primary scrapers at the head pulley face, secondary scrapers past discharge, and return-side ploughs further along the return.

Adjacent zones (the load and transfer zone upstream, the return-side stability zone downstream) interact with the cleaning zone — what happens in one affects the others. A poorly-loaded belt arrives at the cleaning zone with non-uniform material distribution; carryback that escapes the cleaning zone becomes a return-side problem.

• 01

  Inadequate primary cleaning

  Wrong blade chemistry, worn blades not replaced, insufficient contact pressure, or scraper geometry mismatched to the pulley diameter. Result: bulk carryback escapes.

• 02

  Missing secondary stage

  A primary alone on a belt that needs both stages. The thin residue layer that the primary leaves behind becomes return-side spillage.

• 03

  Wrong scraper position

  Primary mounted past the pulley face; secondary mounted too close to the discharge trajectory. Either error causes ineffective cleaning despite correctly specified hardware.

• 04

  Return-side spillage

  Material drops off the return belt onto idlers and walkways. The downstream symptom of inadequate cleaning at the head.

• 05

  Tail pulley contamination

  Material that escapes the cleaning chain reaches the tail pulley and wedges between belt and pulley, damaging both.

• 06

  Secondary mistracking

  Carryback on return idlers changes belt support geometry; the belt drifts laterally over the contaminated point — a problem the tracking zone then has to handle.

• 01

  Primary scrapers

  Heavy-duty pre-cleaners at the head pulley face. Range covers urethane and tungsten-tipped blade chemistries.

• 02

  Secondary scrapers

  Post-discharge cleaners that address fine residue. Different blade geometry from primaries.

• 03

  Return-side ploughs

  V-plough and diagonal designs that divert spillage and tramp material before the tail pulley.

• 04

  Specialist cleaning

  Application-specific solutions for sticky, abrasive, hot or chemically reactive materials.

1. 01Primary blade wear visible across full belt width
2. 02Primary blade tension within specification (no visible slack)
3. 03Material flying past primary on discharge — bulk cleaning failing
4. 04Secondary blade in contact with belt across full width
5. 05Visible residue layer on belt past secondary — finish cleaning failing
6. 06Return idlers visibly contaminated or accumulating material
7. 07Return-side plough in position and engaged with belt
8. 08Tail pulley clean — no material wedged or accumulated
9. 09Walkways and structure under return path clear of accumulated spillage
10. 10No belt-edge contact with structure (mistracking sign)

• Load & transfer zone (upstream)

  Off-centre or inconsistent loading delivers a belt to the cleaning zone with non-uniform material distribution — cleaning suffers.

• Carry-side tracking (upstream)

  A mistracked belt arrives at the head pulley off-centre; primary scraper contact pressure is non-uniform across the width.

• Return-side stability (downstream)

  Carryback that escapes the cleaning zone becomes return-side spillage and accelerates return-idler wear.

• 01Where is the belt cleaning zone?+

  The belt cleaning zone is the section of the conveyor immediately around the head pulley — from the start of material discharge through the pulley face and along the first metres of the return path. It is where all carryback-removal equipment is installed: primary scrapers at the pulley face, secondary scrapers past discharge, and any return-side plough closer to the tail.
• 02What fails in this zone?+

  The dominant failure modes are inadequate primary cleaning (wrong blade or tension), a missing secondary stage, wrong scraper position (mounted in the wrong spot relative to the belt path), return-side spillage from escaped carryback, tail-pulley contamination, and secondary mistracking caused by carryback-contaminated return idlers. Most of these trace back to a cleaning system that's underspecified or out of envelope for the material.
• 03How is the zone assessed?+

  A Tru-Trac zone assessment is a structured walk-through of the head-pulley discharge zone under both loaded and unloaded conditions. The assessment covers primary blade condition and tension, secondary blade contact, return-idler contamination, tail-pulley condition, and the operating envelope of the material. The output is a specification — what needs to change, in what order, to bring the zone inside the cleaning envelope.