Bingo Conrad... The balance rail pins were binding on the mortices. Had to be a factory glipp that they let slide. I managed to get a fairly useable touch by useing the Yamaha balance pin hole tool and told the customer about the problem. They hardly use the thing so I doubt they will do anything with it. Cheers RicB Conrad Hoffsommer wrote: > At 08:49 2/5/2004 +0100, you wrote: > >> Hi gang. >> >> Several of you were getting mighty warm. The problem is related to >> the balance rail pin / hole / position thing. I figured it was pretty >> easy to narrow in on this one. But no one got it 100 % right, so I >> throw out the kicker clue. >> >> If you removed the stack, the keys would fall forward and perhaps >> about a third of the keys (black and white) would fall to only about >> 8 mm key dip. No balance rail pin top was pushing against the back of >> the key button. Bending them forward wasnt a posibility actually as >> they were really too far forward already. The pins were not to tight >> per se...as I'd just sized them to fall slowly ala Yamaha's method >> for that. >> When you pressed hard on those keys... you could see the top of the >> balance rail pin just aft of dead center in the window flex forward >> with the pressure on the key front. >> >> Cheers >> RicB > > > "Fuzzies" or chips not cleared from mortice or mortice not drilled > deep enough, leaving the bottom too thick?? > > Conrad Hoffsommer > Decorah, IA > > - Certified Calibration Technician for Bio-powered Digitally Activated > Lever Action Tone Generation Systems. > - Pianotech Flamesuit Purveyor > - Apprentice Curmudgeon > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives >
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