METHOD OF SETTING THE OSCILLATION FREQUENCY OF A CLOCKWORK SUBASSEMBLY

摘要

Method of setting the oscillation frequency, to a predetermined oscillation frequency, of a clockwork adjusting assembly with no regulating unit with a hairspring assembly balance: - a particular hairspring assembly is randomly selected from a toleranced production; - the restoring torque of said hairspring assembly is measured; - a particular balance is selected randomly from a toleranced production; - a theoretical inertia (IT) of said particular balance is calculated for reaching said predetermined oscillation frequency, as a function of said measured restoring torque of said selected hairspring; the real inertia (IR) of said particular balance is measured; - by direct action on said particular balance, its inertia is corrected to said theoretical inertia value (IT) calculated for obtaining said predetermined oscillation frequency of said adjusting assembly constituted by said particular balance, and by said particular hairspring assembly.