The piano’s action is a complex system of components that transmits the pressure of your finger on the key to the hammer which strikes the string.
In normal use the action of your piano will eventually depart from the evenness which was established when it was originally regulated. In order to keep a piano’s touch as responsive as it was designed to be, it will from time to time require the attention of a professional piano technician.
The need for regulation is to a certain extent a function of the use which the piano gets. A piano which gets normal home use will probably need regulation every 2 to 3 years. This is of course subject to individual judgment. Keep in mind that the action of a concert grand is regulated as a matter of routine before every performance.
Like all piano work, action regulation is a job for a trained specialist. Please call Hall Piano Company for advice when you think your piano needs to be regulated.