Tim, Here is my view... When we understand what drop is...that is to say, what its function is, we will have gone a long way toward determining how much is necessary. In other words, learn 'why' first...'how much' then can be intelligently determined for the particular piano. The dorp screw stops the balancier (rep lever) from pushing the hammer against the wire. For example, if the drop screw was not there, there would be a chance that, if the hammer did not check, and the key remained down, (which may occure during soft playing,) the hammer would rebound off the wire, come down and hit the spring loaded rep lever, and bounce back to the string. The hammer could also 'block' against the wire, being pushed there by the unencumbered rep lever. We need the rep lever, but we don't want the above to happen, so as Wally Brooks says, we introduce the 'stop' screw. Understanding the boundries of drop... too much and too little Too much drop: If the drop screw is engaged early, there is energy wasted at the end of the key stroke, to engage the rep lever deeper. This does not seem like a big deal, unless one is trying to play softly, or if someone plays the piano with a ight touch, like a child. But efficency is everything for fine regulation, and wasted energy here is cumbersome to the pianist. Too little drop: Too little drop is more noticable, because of the occurance of rebounding hammers. Food for thought... One could choose more drop, in favor of adding the extra spring push from the further engaged rep lever. This would only be useful on a light blow. We would be extending the drop screws function, to aid in improving the touch adjustment for soft playing only, in a particular piano. Poor after touch...Do you mean too little? This would be the most common state. Do you know the reason for, and the boundries of after-touch, and how to determin it? Dan Reed Dallas Texas Chapter on 2/13/01 7:59 PM, Tuner1956@AOL.COM at Tuner1956@AOL.COM wrote: > Hello List: > Could someone shed some light on gauging the proper amount of > drop for grand regulation. I'm working on a Yamaha with poor after touch. > Any help would be appreciated. > > Thanks, > Tim / PTG Associate >
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