Dev Fixture Designs

Recommended Components

• Guide Pins
  • Use a spring guide pin for locating the DUT within the fixture.
  • If locating holes for the DUT are smaller than 3mm (2.5mm minimum), then a cradle is recommended.
  • The cradle should mount to GP2-T or GP2-TL guide pins using M3 screws.
• Pressure Pins
  • Dev fixtures are designed to use a 45mm pressure pin.
  • These mount to the pressure plate using a M3x10mm screw.
• Receptacles and Probes
  • Use generic receptacles and probes, this is the most cost effective option.
    • Higher quality receptacles and probes are available, but the short lifespan of the fixture makes them less cost effective.
  • Use the "2" style collar, which corresponds to a 2.5mm collar height.
  • Other collar heights are available, but the pressure pin lengths will need to be adjusted.
  • Use LM2 tipped probes for standard test points, use A2 tipped probes for populated through-holes
• Probe Plate
  • Add cut outs to the probe plate to prevent interference with any tall components.

Fixture Assembly

DUT Mate

Mate the DUT using a mounting/tooling hole so that it is 3.5mm above the probe plate. This is for a 45mm pressure pin, and a 2.5mm collar height.