<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; = charset=us-ascii"> <TITLE>Message</TITLE> <STYLE type=text/css>BLOCKQUOTE { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } DL { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } UL { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } OL { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } LI { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } </STYLE> <META content="MSHTML 6.00.2900.2802" name=GENERATOR></HEAD> <BODY> <DIV><SPAN class=013403915-16012006><FONT = color=#000080>Jon,</FONT></SPAN></DIV> <DIV><SPAN class=013403915-16012006><FONT color=#000080></FONT></SPAN> </DIV> <DIV><SPAN class=013403915-16012006><FONT color=#000080>The one I = worked on had a horizontal tongue, so that when the key was played the arc swung the = sticker back.  The capstan moved  slightly foward. By raising the = tongue flange rail, the sticker movement can be made to match the capstan movement.</FONT></SPAN></DIV> <DIV><SPAN class=013403915-16012006><FONT color=#000080></FONT></SPAN> </DIV> <DIV><SPAN class=013403915-16012006><FONT color=#000080>Friction = measurement is a good plan for finding the correct rail position.</FONT></SPAN></DIV> <DIV><SPAN class=013403915-16012006><FONT color=#000080></FONT></SPAN> </DIV> <DIV><SPAN class=013403915-16012006><FONT color=#000080>But, of = course, all of this could have simply been on the pianos I observed, and may not have = been common to all of these.</FONT></SPAN></DIV> <DIV><SPAN class=013403915-16012006><FONT color=#000080></FONT></SPAN> </DIV> <DIV><SPAN class=013403915-16012006> <DIV dir=ltr align=left> <DIV dir=ltr align=left><SPAN class=455042917-14082004><FONT = color=#000080>Don Mannino RPT, Director</FONT></SPAN></DIV> <DIV><SPAN class=455042917-14082004><FONT color=#000080>Kawai Piano = Technical Education</FONT></SPAN></DIV> <DIV><SPAN class=455042917-14082004><A = href="mailto:dmannino@kawaius.com"><FONT color=#000080>dmannino@kawaius.com</FONT></A></SPAN></DIV></DIV></SPAN>= </DIV> <BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px"> <DIV></DIV> <DIV class=OutlookMessageHeader lang=en-us dir=ltr = align=left><FONT face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> caut-bounces@ptg.org [mailto:caut-bounces@ptg.org] <B>On Behalf Of = </B>Jon Page<BR><B>Sent:</B> Monday, January 16, 2006 5:12 AM<BR><B>To:</B> caut@ptg.org<BR><B>Subject:</B> [CAUT] M & H model = 50<BR><BR></FONT></DIV> <DIV><FONT face=Arial color=#000000 size=-4>>The problem is = that the sticker cloth is sliding forward very badly on</FONT></DIV> <DIV><FONT face=Arial color=#000000 size=-4>>the capstan = during play.  On the one I repaired it was observable by</FONT></DIV> <DIV><FONT face=Arial color=#000000 size=-4>>eye, and the = wear on the sticker cloth was a long mark instead of a<BR>>round = dimple.</FONT></DIV> <DIV><BR></DIV> <DIV>This effect dawned on this morning. As the sticker is lifted, the = arc of the support arm</DIV> <DIV>pushes the cushion towards the front.  A bolstered cushion = would minimize the sliding</DIV> <DIV>friction but the felt is too short.</DIV> <DIV><BR></DIV> <DIV>Not having a sample in the shop I can only speculate.</DIV> <DIV>What is the optimum travel of the support arm?</DIV> <DIV><BR></DIV> <DIV>Is it lifting to (slide forward) or from (slide back) a = horizontal position?</DIV> <DIV><BR></DIV> <DIV>Or lifted crossing the horizontal position through the key = stroke, this would cause the</DIV> <DIV>sticker to change direction by being pushed forwards at the = beginning and pulled</DIV> <DIV>backwards at the end of the travel.</DIV> <DIV><BR></DIV> <DIV>We need someone to test these different executions for = friction.</DIV> <DIV><BR></DIV> <DIV>As far as bobbling hammers go, I'd check the hammer blow and key = dip to insure</DIV> <DIV>jack clearance.  Decreasing the blow and taking up the lost = motion might may be</DIV> <DIV>the cheapest fix.</DIV><X-SIGSEP><PRE>-- </PRE></X-SIGSEP> <DIV><BR>Regards,<BR><BR>Jon Page</DIV></BLOCKQUOTE></BODY></HTML>