Basic Elements › Measuring instruments

THE TIMING MACHINE

What is a timing machine?

The timing machine is a testing instrument used in horology to analyze the precision and regularity of the operation of a watch or a Movement mechanical one. It allows measuring, in a non-invasive and very precise way, the rhythm of the oscillations of the Balance and thus to evaluate the chronometric performance of the Movement.

The timing machine is often referred to by the name of its manufacturer or its model (Vibrograph, Witschi, etc.).

Function and use

This device captures the sounds emitted by the shocks of theEscapement via a sensitive microphone in the form of a support to which the mechanical movement or the complete watch is held. By analyzing these sounds, it calculates the Frequency of the Regulating organ, the variations in Amplitude, the deviation of the guide mark as well as the Daily rate, expressed in seconds lost or gained per day.

Its use facilitates the Regulation / Adjustment end of the Horologist (watchmaker) movement by detecting irregularities or malfunctions that may affect the watch’s precision. It is particularly useful during the Regulation / Adjustment phase in the workshop or during the Testing quality.

Some Timing machines, notably used in laboratories or by chronometric certification bodies (Timelab, COSC, etc.), perform an optical measurement (by filming a component of the Movement or the seconds Hand of the watch head).

Characteristics

• Acoustic sensor : High-performance microphone designed to capture the very faint and precise sounds produced by the Escapement.

• Electronic analyzer : Digital processing of acoustic signals allowing the display of key parameters such as the Guide mark, the Frequency, the Daily rate and the Amplitude.

• Clear Display : Results visible on a digital screen, often accompanied by graphs that make reading and interpretation easier.

• Portability : Compact equipment allowing direct use in the workshop without complex wiring.

Importance in Horology

The Timing machine is an indispensable tool for Horologists (watchmakers). By providing quick and accurate measurements of the Movement’s behavior, it helps identify the appropriate Regulation / Adjustment and ensure a steady rate, but depending on the digital or graphical indications, it also serves as a diagnostic tool.

Its non-destructive, contactless principle avoids any mechanical alteration during Testing, preserving the delicate mechanics of watches while ensuring a reliable diagnosis.