Control System
Automated chemical metering logic calculates dye liquor delivery rates based on upstream sensor inputs before fabric reaches the application point. In continuous pad dyeing plants, a feed forward dosing algorithm adjusts chemical injection valves in response to incoming web speed and fabric density variations. Realtime metering prevents concentration drops in the pad trough during continuous runs.
Predictive Calculation
Input parameters combine speed tachometer signals and fabric weight sensors into chemical flow calculations. Operating a feed forward dosing algorithm ensures that chemical concentrate joins incoming water feeds at rates matching exact fabric absorption capacity. Correct dosing ratios prevent color tailing without waiting for downstream shade errors.
Process Stabilization
Speed changes during roll changes or machine start-ups disrupt chemical uptake ratios if liquor strength remains static. Incorporating a feed forward dosing algorithm maintains constant dye mass deposition per square meter across acceleration and deceleration phases. System response speed depends on sensor sampling rates and pipe valve actuation times.
When fabric construction shifts mid-run, automated metering recalculates mass delivery within milliseconds to preserve shade uniformity.
System Boundary
Closed-loop feedback loops complement predictive logic by correcting residual drift detected by downstream refractometers. Relying solely on a feed forward dosing algorithm without periodic feedback calibration leaves systems vulnerable to unmeasured chemical bath dilution.
