Piano bad regulation

Bad regulated piano action is just like wearing a pair of uncomfortable shoes or driving a

poor aligned car.

Here are some pictures showing you some of the culprits.

Hammer heads are not aligned

Hammer blow distance too far

Improper key dip

Uneven hey height

Improper felts and clothes

Rocking keys without bushing felt support

Bad measurements of back check (too far)

And so on... A time consuming task to get  it done properly

piano regulation

To simplify the term piano regulation, it is a task to perform an adjustment or setting the "alignment"  from the keys strait up to the hammer heads of a piano action.

Every piano (upright or grand piano) has its own "secret measurement" from different piano manufacturer. a well regulated piano will produce a good aftertouch. a bad regulated piano action will generate weird touch, unnecessary noise, double knocking, key jam etc.

some pianist will prefer a firm touch and some prefer a softer,  a professional technician is able to regulate or alter the touch according to their preference by setting the distance, height, weight and other measurement.

To regulate a piano is a time consuming task and must be performed carefully by an experienced piano technician.
how often do we need to regulate the piano? well depend on how frequent and heavy you use the piano
. it is just like driving your vehicle, the more and longer you drive, wheels alignment will likely to go off.

upright piano action

grand piano action