Tuning lever manipulation 2

Presented by: https://pianotuninghowto.com Tuning lever manipulation Chapter There are two schools of thought: By pressure-inertia (the most commonly used method) And, by small blows-impacts (the method adopted and taugh by piano tuning how to) First, let's analyze the most common method, by pressure-inertia The inertia of an object is measured, by its resistance to variation in speed, or its resistance to being set in motion. Inertia is function of an object’s mass: the greater it is, the heavier force will be required to change its motion. This pressure-inertia method consists, in holding the tuning hammer in such a fashion, as to create two opposing forces, and thus, artificially increasing its mass. Hence, the inertia of the tuning hammer. The tuning pin offers a very strong resistance to position changes in its hardwood pin block. With the pressure-inertia method, applying two opposing forces to the tuning hammer, that is to say: One force at the top of the tuning hammer, with the fingers and one force at the bottom of the tuning hammer, with the thumb You artificially, increase the tuning lever’s mass and its inertia and thus, you will neither twist nor bend the tuning pin in any fashion. One force with the fingers, at the top of the tuning hammer One force with the thumb, at the bottom of the tuning hammer If you merely push the tuning hammer in one direction or the other, you are pushing the tuning pin at the same time, with the consequence that it will bend or be moved from its rest position, in the pin block. This situation would only be temporary, since the pin will sooner or later, reassume the position it had in its housing and, the frequency of the string you just tuned, will also shift. This method is currently the most widespread, but more piano tuners are switching to the other method (the one I have been practicing for 35 years), called IMPACT TUNING There is even a special tuning hammer called, 'Impact Tuning Lever', which has been designed especially for this technique. The weight found on the Impact Tuning Lever is adjustable, to accommodate different pin tightness, due to the pin’s friction in the pin block. For the very tight pins that are difficult to move, you will move the weight of the tuning hammer toward the end, and, inversely, for looser pins, you will move the weight toward the base of the IMPACT tuning lever. For more, you can get the complete Piano Tuning Video Tutorial at https://tutorial.pianotuninghowto.com or visit the website https://pianotuninghowto.com/