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Ingun Fixture Design Guidelines ​

This page provides best practices and component recommendations for building reliable Ingun series test fixtures. Follow these guidelines to ensure optimal performance, ease of assembly, and cost-effectiveness.

Guide Pins ​

  • Misumi PGPU guide pins are the preferred method for accurately locating the DUT (Device Under Test) within the fixture.
  • If the DUT's locating holes are smaller than 3mm (minimum 2.5mm), use a custom cradle for positioning.
    • Cradles should be mounted to PGPU guide pins using M3 screws for secure and repeatable placement.

Pressure Pins ​

  • Pressure pin length should be selected based on your specific fixture requirements and DUT height.
  • Pressure pins are attached to the pressure plate with M3 x 10mm screws, providing consistent downward force on the DUT.
  • Standard Ingun cartridges accommodate 65mm pressure pins; verify pin length against the cartridge specifications for your specific model.

Receptacles and Probes ​

  • Ingun GKS series receptacles and probes are recommended for Ingun fixtures:
    • GKS-100 series - Standard performance receptacles for general testing applications
    • GKS-075 series - Compact receptacles for high-density test points
    • GKS-550 series - Heavy-duty receptacles for demanding test environments
  • Probe tip selection:
    • Use standard tips for typical test points.
    • Use pointed tips for populated through-hole connections.
    • Star type probes are also available for specialized contact requirements.
  • Many other compatible components are available to suit specific application needs.

Probe Plate ​

  • Design the probe plate with cutouts to avoid interference with tall components on the DUT, ensuring proper fit and probe access.
  • Design process:
    1. Map the DUT component heights.
    2. Add pockets or through-cuts for tall components.
    3. Ensure adequate plate material remains around the probe holes.
    4. Verify clearance throughout the full fixture stroke.

Moving Plate ​

  • Place the DUT on the plate, adding cutouts wherever probes are located and wherever components on the DUT would otherwise collide with the plate.

Fixture Assembly Instructions ​

DUT Mating Height ​

  • Position the DUT at the appropriate height to achieve optimal probe contact within the working stroke range.
  • The exact height will depend on your selected pressure pin length and receptacle specifications.
  • Use a mounting or tooling hole on the DUT for precise and repeatable alignment.

Key Features of Ingun Fixtures ​

  • Guide Pins: Misumi PGPU series for reliable DUT positioning
  • Receptacles/Probes: Ingun GKS-100/GKS-075/GKS-550 series for professional-grade performance
  • Flexibility: Wide range of compatible components available for custom applications
  • Reliability: Ingun components provide excellent repeatability and durability
  • Performance: Pneumatic parallel stroke delivers up to 2000N contact force and supports 100,000+ test cycles

By following these recommendations, you can achieve robust, repeatable, and high-performance Ingun fixture assemblies optimized for professional testing applications with the flexibility to adapt to various testing requirements.