Techniques

QUALITY TESTING

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1. Dimensional testing of components

It involves verifying the conformity of a component with its manufacturing plan. Measuring instruments ranging from simple ones such as the Rule (ruler) to those derived from the latest technologies (laser, optical, etc.) are used for dimensional Testing.

2. Functional Testing of components and mechanisms

Perfect compliance with the dimensions and manufacturing tolerances of a component does not necessarily guarantee that it will function correctly once assembled. Interaction with other components often requires adjustments or Regulation / Adjustment. Testing these at the various manufacturing stages is therefore essential.

3. Aesthetic Testing

Unlike most mechanical applications, watchmaking places paramount importance on aesthetics. This criterion is incorporated from the very development of a watch, a Movement, or a component. In watchmaking, it is not about beautifying a functional component, but rather about producing a component that is both functional and aesthetic.

4. Testing of the Daily rate and Regulation / Adjustment

Once the Movement is assembled and functional, the Regulation / Adjustment step, which aims to adjust the precision of the Movement (and consequently that of the watch), is essential. Many values are measured (and adjusted if necessary) to meet the manufacturer’s tolerances.

5. Water resistance Testing

Water resistance is not only intended to protect the inside of the Case against water infiltration, but also against dust and humidity. Different machines exist to perform this Testing. In dry machines, the watch is placed under a pressurized Bell. The deformations of the Case are then measured at different pressures in order to verify its Water resistance. In other machines, the watch is immersed in water contained in a cylinder that is also pressurized. The appearance of air bubbles at the joints of the case will reveal a Water resistance failure and will help locate its position.