I installed 5 glide bolts upside down (similar to some Baldwin grands) on the front of my bench (which is a Steinway B keybed) and use them to make the adjustments. The way I set them up is to use action springs to hold the action firm to the bench, then I raise and lower the front glides in the bench by checking the center glides as you do when bedding the action, making adjustment to the front glides bolts 'til you get it right. Then I check the key dip to be sure it's correct. Works great. I don't need to make many adjustments in the piano after that. Al G -------------------------------------------------- From: "Ed Sutton" <ed440 at mindspring.com> Sent: Wednesday, July 29, 2009 7:56 PM To: <pianotech at ptg.org> Subject: Re: [pianotech] regulating backchecks? > If you're taking the action home: > > 1) Bed the action in the piano > > 2) In the piano, remove four front key wool punchings, at the ends and > middle of keyboard, and replace with cardboard punchings to make > unambiguous match to the dip block. > > 3) Put the action on your bench, mark the location with clamp blocks or > tape, shim with index cards until the measured keys match the dip block > again. > > 4) Tape the cards to the bench top. > > es > ----- Original Message ----- > From: "David Andersen" <david at davidandersenpianos.com> > To: <pianotech at ptg.org> > Sent: Wednesday, July 29, 2009 5:54 PM > Subject: Re: [pianotech] regulating backchecks? > > >> >> On Jul 29, 2009, at 11:07 AM, jim ialeggio wrote: >> >>> What I really want is a reliable protocol to prove that the bench top >>> keybed is precisely matching the piano's keybed. >>> >>> Any ideas out there? >> >> I'm continually surprised more technicians don't make use of the two >> simple ways I've found to recreate exact key travel outside the piano: >> >> ---get real good at using a dip block (I use a hardwood 10mm) then >> either >> >> 1. get an Edwards Action Trolley and recreate exact key travel by its >> method...excellent and precise; or >> >> 2. when the action is in your lap, put a cheekblock face down on one >> knee under the balance rail and oonch around, move that leg, until you >> find the point where the key travel becomes exactly what it was in the >> keybed. Doing it will show you what I mean, and either protocol will >> create a sharp rise in your regulation precision and get you real, real >> friendly with your dip block. >> >> David Andersen >> >> >> >> > >
This PTG archive page provided courtesy of Moy Piano Service, LLC