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Part identification

Colour and shade discrimination

The inspection point

Colour is not noticed until two parts are seen side by side; a part that looks right on its own creates a shade difference when it meets its neighbour at assembly. The difference usually comes from the material batch or the pigment mix and spreads across a whole batch.

How it runs on the line

The lighting is held at a constant colour temperature; on this job the stability of the light matters as much as the measurement. The model learns the accepted shade range, so a part outside it and blotchy colour within one part come out as deviation. The result reaches the line.

  • Five caps of the same shade. Colour and shade discrimination.OK
    Five caps of the same shade
  • One cap a different shade. Colour and shade discrimination.NOK
    One cap a different shade

Application references

Mode used
Part identification
Training set
About 20 accepted parts
What decides it
Constant colour temperature
Decision time
~90 ms per part

Let us test your part.

We bring the unit to your line and measure your own part at your own line speed. The quote comes after that measurement.