Now that we have addressed let off, drop, and repetition lever spring adjustment in our previous discussions, rounding out the four primary adjustments is the back-check.
The back check itself is a small wooden block covered with a small piece of felt, over which, a strip of leather is stretched. It is mounted to the back end of the key with a wire that provides easy adjustment.
Its purpose is to catch the hammer after striking the string, in a position of approximately 5/8 of an inch from the string. When the hammer is called upon to repeat in rapid succession, the hammer does not have to begin from its initial resting position, but instead can begin its abbreviated journey back to the string, in essence, taking a shortcut.
Therefore, grand pianos can repeat notes faster than uprights. For it to function properly, both the surface and condition of the leather and hammer tail must be correct.
Too smooth a tail and a repetition lever spring that is too tight, the hammer will get sent back to strike the string again. A “bobble”, a very undesirable and noticeable condition.
Working together, the hammer checking, correct repetition spring adjustment, along with a few other variables, work together to create a very responsive action. One that is a joy to play.
Comments will be approved before showing up.
SACILE, ITALY - In May of 2022, FAZIOLI Arizona Team was invited to come to celebrate FAZIOLI 40th Year Anniversary World Dealer Meeting. We are honored to be a part of FAZIOLI's 40th Anniversary, a milestone in piano history!
Our Store Manager Darald went to this magnificent dealer meeting and had a wonderful experience. He enjoyed dinner with the Fazioli family, team, and other dealers around the world. They also toured the factory and learned all there is to know about the making of this world renown pianos. Darald is now an Fazioli expert and can help you with your dream piano journey.