<HEAD> <META content="MSHTML 6.00.2900.2802" name=GENERATOR></HEAD> <BODY> <DIV>Rex-</DIV> <DIV>You are making some great observations.</DIV> <DIV>This could be poor regulation at the factory, or as someone else menti= oned, a flexing keybed.</DIV> <DIV>I used to maintain a Kimball "Viennese Edition" vertical which had a s= easonal keybed flex of about 1/8".</DIV> <DIV>The first time I saw it, I blamed the previous technician for leaving = 1/8" lost motion. You can figure the rest  of the story.</DIV> <DIV>What kind of piano are you describing?</DIV> <DIV>Ed Sutton<BR><BR><BR>-----Original Message----- <BR>From: Teslaspark@a= ol.com <BR>Sent: Mar 1, 2006 4:14 PM <BR>To: pianotech@ptg.org <BR>Subject:= Upright Action mounting pins <BR><BR></DIV><ZZZHTML><ZZZHEAD><ZZZMETA cont= ent="text/html; charset=US-ASCII" http-equiv="Content-Type"><ZZZMETA = name="GENERATOR" content="MSHTML 6.00.2900.2802"></ZZZHEAD><ZZZBODY id= =role_body style="FONT-SIZE: 10pt; COLOR: #0000ff; FONT-FAMILY: Comic S= ans MS" rightMargin="7" topMargin="7" leftMargin="7" bottomMargin="= 7"><FONT id=role_document face="Comic Sans MS" color=#0000ff size=2= > <DIV><FONT face=Arial color=#000000>Hi, group!</FONT></DIV> <DIV><FONT face=Arial color=#000000></FONT> </DIV> <DIV><FONT face=Arial color=#000000>My name is Rex Burrus from Chicago = and I'm new to the list and recently new to piano technology having been in= doctrinated by classes of a local mentor and taken under the wings of the C= hicago PTG chapter early in 2005.  I've been tuning mainly, but also w= ork the technology angle of pianos, plus work on players for all of one yea= r now.</FONT></DIV> <DIV><FONT face=Arial color=#000000></FONT> </DIV> <DIV><FONT face=Arial color=#000000>Now for my juicy question du jur...= </FONT></DIV> <DIV><FONT face=Arial color=#000000></FONT> </DIV> <DIV><FONT face=Arial color=#000000>I have on two occasions come to won= der about action mounting in an upright.  In both cases, I have found = the action to be somewhat ajar and not even settled upon the mounting pins = in the keybed which have made these pianos play lousy.  The one piano = was completely cured simply by repositioning the action properly and the cu= stomer was so overjoyed that I made extra money on that tuning.  On my= current project, I found that the action is not properly resting on all th= e mounting pins.  In fact the middle two pins are not even in contact = with the wells in the action supports.  These pins are threaded and sq= uared so that turning them moves the mounting pins up and down in the keybe= d.  I suspect that at another time, some "tooner" ran into trouble sea= ting the action and at a minimum raised the treble end as the treble hammer= s were striking the v-bar and making no sound.  So, minimally, I'll lo= wer the far upper mounting pin and this should cause all mountings to fall = into proper alignment.  Intellectually, I'm wondering overall what any= procedure might be to precisely locate an action using these mounting pins= .  I understand that raising or lowering the action changes the striki= ng point of the hammers on the speaking length of the wires, so I'm curious= as to how the striking point is found or if there are any good references = on this, and what might be a proper procedure for adjusting (regulating?) t= he mounting pins in the keybed of an upright?  Is this a factory only = adjustment?</FONT></DIV> <DIV><FONT face=Arial color=#000000></FONT> </DIV> <DIV><FONT face=Arial color=#000000>Thanx!</FONT></DIV> <DIV><FONT lang=0 face="Times New Roman" size=2 PTSIZE="10" FAMILY= ="SERIF"><B><BR><FONT color=#000000>PIANO TUNING by REX!<BR></FONT></B>= <FONT color=#000000>Repairs and adjustments, also.</FONT><B><BR><FONT col= or=#000000>(708) 418-0750<BR></FONT></FONT><FONT lang=0 face="Trebuch= et MS" color=#0000ff size=2 PTSIZE="10" FAMILY="SANSSERIF"></B><A h= ref="mailto: teslaspark@aol.com">teslaspark@aol.com</A></FONT></DIV></FON= T></ZZZBODY></ZZZHTML></BODY>