An Investigation of the Repeatability of Nonrigid Parts Measurements: A Case Study of an Aluminum Panel

Nonrigid parts are traditionally mounted on over-constrained holding fixtures during inspection in order to support the part and maintain an acceptable level of measurements repeatability and reproducibility. The fixture's over-constrained configuration and restraining sequence are critical characteristics of the fixture and can become active components of the measurement system. Therefore, this paper investigates the profile measurements repeatability of an aluminum flat panel with respect to these aforementioned characteristics. To this end, this paper studies the measurements variability of the panel mounted on four over- constrained fixture configuration, each with two different restraining sequences.