<HTML>In a message dated 1/17/2002 9:48:41 PM Pacific Standard Time, RNossaman@KSCABLE.com writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Subj:Re: Baldwin accu-hitch pins Date:1/17/2002 9:48:41 PM Pacific Standard Time From:<A HREF="mailto:RNossaman@KSCABLE.com">RNossaman@KSCABLE.com</A> Reply-to:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> To:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> Sent from the Internet    Ron ,David</BLOCKQUOTE>    Ok I still don't get it!  Nothing about what has been said so far about adjusting the bearing on acujust makes much sense to me. It sems to be arbitrary Compared to the way I ( and many) set  bearing on new boards using a prestressed method  there is a good deal of predictability in the outcome but with this, how will you ever know if there is some kind of even , uniform and adequate bearing to produce a tone worth listening to without impedance problems?    The obvious & possible upside to this is, if I can get a grasp of it, is that one should be able to find the sweet spot of compression for each individual sound board a thereby maximizing tonal potential. I've done this with the Coleman plate suspension system with success. The system allows for plate elevation adjustment with the piano at pitch. I.E. set up what seems to be a reasonable amount of bearing and adjust it up or down checking the tonal output as you go.   I think that it is worth knowing that you can totally screw up the outcome of a new belly job just by getting the bearing set unevenly. Meaning tonal weaknesses and (splatty) impedance problems in certain registers. ASK ME how I know!!!!     Ron (somebody) tell me what I'm missing on the acujust in a way I can absorb it. What's that you say? not possible. hmmmmmmm               Dale Erwin <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px"> > > I recently assessed a Baldwin D with accu hitch pins.  After measuring the > bearing in several places I found that the piano generally was set up with > negative rear bearing (Lowell Gauge).  I am considering adjusting the rear > bearing in order to get the overall bearing where I want it.  What is the > general procedure for doing this?  Does one measure each string in each > section?  Or is there a way to set the end strings, for example, of each > section and somehow put all the strings on the same plane?  Do you have to > let off the tension to move the string down (in this case) the hitch pin?  Or > can I just tap it down with a brass rod?  Input is appreciated. >  > David Love Hi David, You don't really need to measure each and every string. Set maybe four in each section with the gage and eyeball the rest. Spot check occasionally to see how closely your eyeball calibrates, adjust accordingly, and trust the average to get you well within close enough. Close enough is, after all, close enough. Your judgement is as good as anyone elses. It is done at full tension, goes more quickly than you expected, and will probably leave you wondering why you were concerned about it in the first place. It's a very nice system - which will come home to you the next time you have to set bearing again in the "usual" way. A mild steel or brass rod with a hole drilled in it to accommodate the hitch pin diameter works just fine to knock them down. Piece of cake. Ron N</BLOCKQUOTE> </HTML>