[pianotech] Steinway L rebuild question

[Ed Sutton]

If you just measure string height at the strike point, it shouldn't matter 
if the string is angled.

ES

----- Original Message ----- 
From: <A440A at aol.com>
To: <pianotech at ptg.org>
Sent: Saturday, July 25, 2009 2:21 PM
Subject: Re: [pianotech] Steinway L rebuild question


> Ed  writes:
>
> <<   But the information you give indicates that the hammer bore distance
> is _not_ fine. Is the keyframe properly bedded? If so, you need to measure
> string height(A) and cener pin height of the hammer flange(B). Bore 
> distance =
> A - B.  >>
>
>         This calls up a question.  In order for the above to actually
> leave a hammer hitting the string at 90 degrees, it has to be assumed that 
> the
> string is parallel to the keybed.  This is rarely the case in the upper 
> two
> octaves, where strings rise from the capo to the bridge.  A boring done
> strictly on distance between stringheight and center pin height will often
> produce a hammer that is leaning distally upon string contact.
>     I use a set of measured borings as trials.  That way, I can lift them
> up to the string, place a square on the string and compare it to the
> centerline of the hammer, which is at 90 degrees to the shank.  This 
> allows me to
> tell if the hammer is at 90 degrees to the string upon contact.
> Regards,
>
>
>
> Ed Foote RPT
> http://www.uk-piano.org/edfoote/index.html
> www.uk-piano.org/edfoote/well_tempered_piano.html
> <BR><BR><BR>**************<BR>A bad credit score is 600 & below. Checking
> won't affect your score. See now!
> (http://pr.atwola.com/promoclk/100126575x1222585106x1201462830/aol?redir=http://www.freecreditreport.com/pm/default.asp
> x?sc=668072&hmpgID=62&bcd=JulyBadfooterNO62)</HTML>
>
>