Every hot runner zone is a small oven whose thermocouple you are trusting absolutely. A drifting or reversed thermocouple means the zone runs far hotter or colder than the display shows, degrading material in the manifold or freezing off a gate.
The steps ChatterFix schedules for this PM. Every step is a checkable item on the work order — a technician can speak their way through it without touching a keyboard.
Every hot runner zone is a small oven whose thermocouple you are trusting absolutely. A drifting or reversed thermocouple means the zone runs far hotter or colder than the display shows, degrading material in the manifold or freezing off a gate.
Black specks and colour streaking from degraded material sitting in a hot zone, gates that freeze and unbalance the tool, and zones quietly left in manual because nobody diagnosed the fault.
Quarterly verification against a calibrated reference, and immediately after any nozzle heater or thermocouple replacement. Any zone running in manual is a fault, not a workaround.
This procedure — and every other PM for your industry — is already built into ChatterFix. Pick your industry and it lands on the right equipment, on the right interval, in about three minutes.