<HEAD> <META content="MSHTML 6.00.2900.2873" name=GENERATOR></HEAD> <BODY> <DIV>Julia-</DIV> <DIV>The PTG reprint book _Hammers and Touchweight_ would be a good place to start.</DIV> <DIV>And there's a lot more after that.</DIV> <DIV>Ed S.<BR><BR></DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 0px; BORDER-LEFT: #0000ff 2px solid">-----Original Message----- <BR>From: KeyKat88@aol.com <BR>Sent: Jun 4, 2006 3:29 PM <BR>To: pianotech@ptg.org <BR>Subject: Re: Re key bounce <BR><BR><ZZZHTML><ZZZHEAD><ZZZMETA content="text/html; charset=US-ASCII" http-equiv="Content-Type" charset="US-ASCII"><ZZZMETA content="MSHTML 6.00.2800.1106" name="GENERATOR"></ZZZHEAD><ZZZBODY style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; BACKGROUND-COLOR: #ffffff"> <DIV> <DIV>Greeetings,</DIV> <DIV> </DIV> <DIV>       Some ot this is so greek to me! Where can I learn more about touch weight?<BR></DIV> <DIV>Julia Gottshall</DIV> <DIV>Reading, PA</DIV> <DIV> </DIV> <DIV>In a message dated 6/1/2006 5:51:32 PM Eastern Standard Time, sec@overspianos.com.au writes:</DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT face=Arial>One cause of key bounce, besides low up weights, is overworked <BR>>wippen support springs...  Check the wippen flanges and see if there <BR>>are support springs...  if so, see how much the down weight drops <BR>>after disengaging the spring...  if it's more than 17grams your <BR>>likely to have "bouncy key".  The more the spring works above 17 <BR>>grams the worse the effect.  This 17gram cut off is echoed by Lloyd <BR>>Meyer, Renner USA and I agree with it, although I find that pianos <BR>>feel more normal to more pianists when key weighting is designed so <BR>>that spring tension only reduces touch weight 9-12grams.  I've seen <BR>>Samicks and other makes with springs that work as much as 40 grams <BR>>off the touch weight...  that's a big big no no...!<BR>><BR>>David Stanwood<BR><BR><BR>I would agree with David. When using assist springs we usually set <BR>them to assist 10 grams on note A1, graduating down to no assistance <BR>by around note C52. We've set up no. 6, which we're bringing to <BR>Rochester, with assist springs set up as mentioned above.<BR><BR>Best regards,<BR>Ron O.</FONT></BLOCKQUOTE></DIV> <DIV></DIV></ZZZBODY></ZZZHTML></BLOCKQUOTE></BODY>