This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Great tip, Joe! To help others identify the symptom, what you feel in the touch with a damper upstop too high is a rebound at the bottom of the keystroke. What is happening is the inertia of the damper action continues to lift the damper lever off the back of the key. When it falls back on the key you can feel it as a rebound effect. Lowering the stop rail prevents it from lifting off the back of the key. This stop rail will go out of adjustment if the damper pedal is lifting the dampers too high. The stop rail should NOT be used as a stop for the damper pedal. A separate stop for that should be used, preferably directly above the damper pedal lift rod. Some inexpensive grands don't have one. Just move the trapwork out of the way, drill a hole and thread in a 1/4 X 1 inch bolt. Viola! A damper pedal stop adjustment. Be sure to glue a piece of felt on top of the trapwork where it will hit the bolt head. To adjust the damper pedal stop, I like to set it so the bi-cords are just at the top of the strings, maybe lower. If they are off the string that is far enough. Wherever you set it make sure that with the pedal on depressing the key will lift the damper head a little higher than the tray lifts it. If you have it set too high the pedal will lift the damper off the key. This will cause you to feel it in the key when putting the pedal on and off with the key depressed. You will feel that damper lever coming back down on the key when you release the pedal. So don't set the pedal stop too high, especially don't let it lift high enough to hit the stop rail Dean Dean May cell 812.239.3359 PianoRebuilders.com 812.235.5272 Terre Haute IN 47802 -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Joseph Garrett Sent: Sunday, December 18, 2005 1:15 PM To: pianotech Subject: Damper Upstop Rail Adjustment Paul said: " As far as the upstop rail is concerned, you need to set it by using a black key fully depressed. Leave a very minimal travel of the damper while the key is depressed. It's ok to have the dampers lift minimally, assuming the damper felt fully clears the strings. If your trapwork is properly adjusted, you won't have a problem." Paul, Totally agree.<G> Yesterday, I was tuning a Kawai KG-2C and hated the touch. Checked the Upstop clearance...sure enough, way too high! Right now it's colder'n hell and the wind is blowing. I was in a nice warm Sanctuary and really didn't want to schlep out to the car to get my modified clothes pins, just to set the darned rail. Soooooo? What to do? <G> As I carry 6 wide rubber mutes in my tuning kit, I thought...why not? Played the sharps at the end of each section, put a mute under the felt, to the height where the damper heads no longer winked. As this piano has one continuous upstop rail, all I had to do was loosen all of the screws and let it drop onto the raised damper levers. Cinched the screws, reinserted the action for testing and...tada! Regards, Joe Garrett, R.P.T. (Oregon) Captain, Tool Police Squares R I ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20/e1/d2/29/attachment.htm ---------------------- multipart/alternative attachment--
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