HI, I just can't help asking this question . . . It relates to my set of keys with the too tall whites --- but it directly brings in this issue of moving the fulcrum. When keys have been improperly recovered so that they are taller than the originals, the key will have a forward slant to achieve the same key height (kinda like somebody has started to play it). This means that the fulcrum is already of the front of the bushing, not at the pin. In a normal situation the fulcrum point moves forward during the stroke from the pin to the edge of the punching. So. . . . if the fulcrum is already at the front edge of the bushing with my too tall set of keys, that would make the action heavier. Right? BTW, I have already brought my troublesome keys to a different shop for correction. I am asking this question just to solve my curiosity. I'm thinking that this may be why every one of you told me to scrap the covers and start over. (?) Thanks -- ready to drop this thread now . . . . Denise On Jan 8, 2010, at 9:34 AM, Al Guecia/AlliedPianoCraft wrote: > Martin, since Barbara hasn't replied, I will give you a quick rundown. > > Remove the stack and keys. > Put a drop of glue on the back of the felt punching and put the key > back on the pin and press down. I do 3 to 5 at a time. > Let it dry for about an hour or so. > Remove the keys ( the punching should come up with the key). > Using a sharp chisel cut the punching at an angle toward the front > of the key (\) not straight down (I). You can start in the center of > the hole or the front of the hole. > Be sure to line up the cut with key front, not the area where the > punching is, so the cut is lined up with the key travel. > Return key to frame. > > That should do it. > > Al - > High Point, NC > From: martin cipolla > Sent: Friday, January 08, 2010 8:59 AM > To: pianotech at ptg.org > Subject: Re: [pianotech] Best way to change touch on Yamaha Grand > > Barbara, Please clarify for me. I seem to be a bit slow on this. > How would I cut the punching to affect the greatest change? I am > assuming I need to take off the action stack etc. and remove each > key, or is there also a "trick" for that? That would be cool. > Thanks you for your help with this. > Marty > > Date: Fri, 8 Jan 2010 02:09:01 +0000 > From: piano57 at comcast.net > To: pianotech at ptg.org > Subject: Re: [pianotech] Best way to change touch on Yamaha Grand > > Or recycled ideas. :-) One thing I didn't mention, is you can > adjust the amount of change by where exactly you cut the punching-- > making the cut exactly half way though at the balance hole point, or > a little further back, etc. > > I have a blast working on actions that people complain about being > too heavy. I like doing the detective work and solving the puzzle-- > there have been some interesting ones! > > Barbara Richmond, RPT > near Peoria, Illinois > > > ----- Original Message ----- > From: "Denise Rachel" <pp-ff at verizon.net> > To: pianotech at ptg.org > Sent: Thursday, January 7, 2010 4:12:50 PM GMT -06:00 US/Canada > Central > Subject: Re: [pianotech] Best way to change touch on Yamaha Grand > > Excellent. I love new ideas . . . > > D > > On Jan 7, 2010, at 5:09 PM, Barbara Richmond wrote: > > Hi Denise, > > The half punching is used at the balance rail, the conical > (Crescendo) punchings are front rail punchings--or maybe I'm not > understanding what you are referring to. > > In this case, maybe quick and dirty is a little overstated. But it > is a lot faster (and easier to un-do) than moving capstans or > knuckles or reducing the hammer weight. I've used this method on > pianos where the touch was just a little heavy. > > An added bonus is that leveling keys on the pianos with the glued on > punchings is a snap--there is no lifting of the cloth punching when > adding or subtracting paper punchings, since the punching lifts with > the key. > > Best, > > Barbara Richmond, RPT > A guy in a bobcat took pity on me while I was shoveling snow and > cleared the rest of the driveway for me...near Peoria, Illinois > > > ----- Original Message ----- > From: "Denise Rachel" <pp-ff at verizon.net> > To: pianotech at ptg.org > Sent: Thursday, January 7, 2010 3:42:45 PM GMT -06:00 US/Canada > Central > Subject: Re: [pianotech] Best way to change touch on Yamaha Grand > > Thanks Barbara, > > They didn't teach any "quick and dirty" at school, so I'm glad I > have all of you to help out with this! Awesome. > > Have you ever used those punchings that are conical? Seems they > operate on the same principle. I've never seen them or any glued > half punchings in pianos to date. But then the year is still > new. . . . . > > Cheers, > > Denise > > > > > > Hotmail: Trusted email with powerful SPAM protection. Sign up now. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100108/d7486bf7/attachment-0001.htm>
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