The adjustment of the action & keys, called regulating, is important for the proper functioning of parts. In order for the input from your finger to be efficiently translated to the hammer then to the string, the action and keys must be regulated to very exact tolerances. Regulation has long been of special interest to me and is a service I can provide with expert precision. How a piano plays and how a piano feels has much to do with regulation. To read more about regulation from the Piano Technicians Guild click here. Regulation.
For technical drawings of a vertical or grand piano action click below.