Light optical sensor Famacont PMC-15

vision processingfor web guiding

Overview
The Famacont PMC -15 is a non-contacting measuring and control system for continuous, in-process determination of thread density (weft/thread and course density) and basis weight of textile fabrics. The system is available with optoelectronic (reflex light) sensors or high-resolution camera sensors and uses digital signal processing and image analysis (FFT) to determine thread counts and derive basis weight for inline process control.

Optoelectronic sensor / Camera sensor
The optoelectronic version projects individual threads or courses onto a photocell via a precision oscillating lens; each thread passage generates a frequency signal proportional to the thread count. High-power reflex light LEDs provide illumination. The camera version uses a high-resolution imaging sensor combined with FFT-based image analysis to determine thread density in both warp and weft directions and to support accurate basis weight evaluation.

Product highlights

• Non-contacting, continuous in-process measurement
• Accurate thread/knit density determination using digital signal processing
• High-resolution imaging option for precise FFT analysis
• Smart feed-forward control algorithm for process regulation
• Adaptable to various finishing machines

Customer benefits

• High repeatability of measurements
• Consistent residual shrinkage control
• More homogeneous product appearance
• Documentation and monitoring of product quality
• Reduction of rejects and rapid return on investment

Area of application

• Stenter frames
• Shrinking machines
• Compacting machines

Sensors / Options
The Famacont PMC -15 is offered with sensor variants matched to the application: an optoelectronic reflex-light scanner with oscillating lens for single-thread detection, and a camera scanner with high-resolution imaging for both warp and weft analysis and basis weight determination. Both concepts rely on strong reflex illumination and precision optics.

Documents and further information
Product brochures and technical documents (including the Famacont PMC-15 brochure and related technical notes) are available as downloadable PDFs in the manufacturer's documentation section.

Technical specifications

• Measurement principle: non-contact optoelectronic (oscillating lens + photocell) or imaging (camera + FFT analysis)
• Measured values: thread density (weft/course), course density, derived basis weight
• Illumination: high-power reflex light LEDs
• Signal processing: digital signal processing and FFT-based image analysis
• Control: smart feed-forward algorithm for automatic over-feed direction control
• Operation: continuous, in-process measurement on running textile webs
• Main application: stenter, shrinking and compacting finishing equipment