Technical Expertise

Inspection Frames

Coordinates overall machine control with a PLC control system to control the speed and tension in textile inspection frames, allowing operators to inspect for flaws while regulating tension to prevent product stretch or breakage.
Industries Served:

Textiles, Films, Paper

Products Used
  • Micro PLC
  • Flat Panel Operator Interface
  • AC Flux Vector Drives
The Advantages:
  • AC motors reduce installation and maintenance costs, an improvement over DC drives that are expensive to implement and maintain, and need more frequent maintenance.
  • Flexible standard drives and motors keep costs of parts lower.
  • Off-the-shelf PLC technology more cost-efficient than larger PLCs in drive systems.
  • Operators have manual and auto-reverse controls to stop, reverse and move inspection frames forward again to check for possible product flaws.
  • Flexible operator interfaces allow for better control, which leads to improved product quality.
How It Works:
  • Tension control is made possible through two AC Flux Vector drives, providing speed regulation down to 0.01%.
  • These drives are connected with a digital link that allows them to run in a digitally locked ratio loop, so the master speed can be automatically adjusted as needed.
  • The Micro PLC provides the master speed reference and coordinates machine control.
  • The system provides 1% tension regulation over the entire speed range.
  • A color flat panel operator interface is used for machine setup, capturing of information, and machine diagnostics.
Project Planning
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