I. Locating the Problem by Identifying Fabric Defects Observing the appearance defects of the dyed fabric is the most direct way to determine the source of the malfunction: If there are darker areas a
1. Seam Overprint Symptom: Darker areas appear at both ends of the fabric. Causes: Seam overprint is too wide or thick, tension is too high, the guide fabric is too short, or the color/texture of the
1. Equipment Preparation: Check the power supply, transmission system, temperature control system, and liquid level sensor to ensure all components are operating normally. Clean the dyeing tank to pre
I. Uneven Dyeing (Color Variation, Color Difference) Main Causes: Poor Dye Liquor Circulation: A malfunctioning circulation pump, blocked pipes, or damaged valves lead to uneven dye liquor distributio
I. Upgrade to a closed-loop tension control system Using a closed-loop control scheme of vector frequency converter + tension sensor + PLC is the most effective technical path to solve tension fluctua
I. Mechanical System Problems 1. Non-parallel or Worn Guide Rollers: Misaligned installation or long-term wear of the fabric winding roller and guide roller can cause uneven fabric stress, leading to
I. Upgrade to a Closed-Loop Tension Control System Adopting a closed-loop control scheme using a high-performance vector frequency converter + tension sensor + PLC is currently the most effective tech
I. Mechanical System Problems 1. Non-parallel or worn guide rollers: Misaligned installation or long-term wear of the fabric winding roller and guide rollers can cause uneven fabric stress, leading to
I. Mechanical System Problems 1. Non-parallel or worn guide rollers: Misaligned installation or wear from prolonged use of the fabric roll and guide rollers can cause uneven fabric stress, leading to
I. Detecting Abnormalities During Equipment Operation 1. Listen for Sound Changes: If the jigger dyeing machine makes a "clunking" sound or periodic abnormal noise when changing direction or
I. Core Cause Analysis 1. Outdated Control System Traditional single-frequency converters or DC motor controls have slow response and lack real-time feedback, making it difficult to cope with tension
I. Color difference between the beginning and end (lighter and darker ends) Cause: The dye concentration is not consistent during the dyeing process, especially noticeable in giant roll dyeing machine