-There’s one measurement called after touch and that one goes all the way down to like 100th of an inch or more it’s a little insert under the white part of key. Another very precise one is hammer knuckle (which is the little circle on the hammer) has to be lined up just right. The jack (the stick under the knuckle) presses up on the knuckle and that moves the hammer. The jack then falls away so that the hammer will will “fly” for a tiny distance and bounce off the string. It has to be flying or it would distort the sound. The precise measurement is the back of the jack has to be line up with the front part of that verticals line on the knuckle.
Piano action model grand piano
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The release button is that cylindrical piece with green felt pointing down. U screw it to adjust it. The whole thing moves up until it hits the release button then the jack get pushed off the knuckle letting the hammer fly a short distance
Very interesting! I would know nothing about the inner piano workings. So this is like a model to display? Did you have to put all the parts together yourself or did it come assembled?
Got it on eBay from China was hard to find came assembled. It’s a work king model so it moves when u press the key
One thing I thought of after seeing this is when playing pianissimo. Instead of hitting the key and letting gravity kill it just perfectly (and possibly miss) the string. Why not start the note a little early and have it move at a more constant slow speed into the string. You’re in control of the hammer until a sixteenth of an inch away why not utilize that? Basically saying when playing soft don’t like pluck it move it all the way down and perhaps start the key descent a tad earlier when pianissimo. It just has to have enough speed at the top to fly a tiny distance up.
If you’re interested-Every key has over 100 parts I think all the parts have a name. Even the screws have a name ones called the drop screw. I forget all the exact measurements but the hammer only flies about a sixteenth of an inch you’re in control until then. The only thing you can control is the speed of the hammer none of the force or touch matters for tone only the speed of the hammer. The middle part is the double escapement mechanism found in grands but not uprights. It allows for rapid playing without having to let the key raise fully. The hammer bounces off the string and gets caught by the “backstop” and doesn’t drop all the way down. That’s the little brown felt thing. I’m sure you all know about the damper. This is a working model all the part move when you press the key. I freaking love this this that’s how I know I’m a true nerd. 🤓 lol