<!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN"> <HTML> <HEAD> <META content=text/html;charset=iso-8859-1 = http-equiv=Content-Type> <META content='"MSHTML 4.72.3616.1301"' name=GENERATOR> </HEAD> <BODY bgColor=#ffffff> <BLOCKQUOTE style="BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; PADDING-LEFT: = 5px">Hi there Dave... Interesting reading, I = will study it closer and your follow up as it comes through. David Standwood is = interested in useing the data I sent him from my little "front = weight" problem piano to set up an example and to some degree a walkthrough = of his method for interested on this list. I am not sure exactly what he = has in mind, but I would assume it would be a valuable exercise for any of = us particullarily interested in actions, and anyone else for that = matter. Any and all interested should pipe in and let him know so that he's = willing to put in the time an effort. As I understand it, he would be putting = up a couple sides at his website to display the data and his analysys of = it. Sound interesting ????? Chime in then !</BLOCKQUOTE> <BLOCKQUOTE style="BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; PADDING-LEFT: = 5px"> Results of current action modification: Original = action had a shank with a 16.2 knuckle radius and an angled wippen = cushion. This action was heavy and had little to no aftertouch (jack was not = clearing the knuckle sufficiently). Installed a shank with a17mm knuckle = and a straight wippen cushion (Turbo Wip). Trial regulated a few notes = and the aftertouch was the same. I set the hammer to half-blow ran a line = from the b/r to the c/p, capstan too far forwards. I placed a mark on the = cushion where the line intersected. With the hammer still blocked and the = capstan removed I also placed a spacer under the key front to simulate = the key's attitude at that key event (half-blow). I simply held a small = ruler parallel to the wippen support post and drew a line through the mark = on the sides of the wip and keystick. A temporary capstan allowed a = trial run, perfect.  I set all the capstans to this new line. The = original capstan angle was 10 degrees with an average KR of .48. New line = has capstan angle at 90 degrees with an average KR of .50 and in a = tighter range. It makes you wonder how capstans are drilled so = haphazardly to begin with. Had this 'magic line' intersection resulted in the = jack not functioning to my liking, I would have moved the capstan fore or aft = to where it did and adjusted the wippen cushion height to = accommodate the 'magic line'. This method has allowed me to specify blow = distance, dip, etc, and result in a fine regulating piano as opposed to = having to fudge on hammer height or dip to get the action to function  properly. The biggest mistake we make is to assume that = everything at a factory was performed with absolute accuracy. My next step is = to sample UW/DW and have David calculate a smooth FW spec. This = stuff is so easy. <DIV>Jon Page,   piano technician</DIV> <DIV>Harwich Port, Cape Cod, Mass.</DIV> <DIV><A href="mailto:jonpage@mediaone.net" EUDORA = = AUTOURL>mailto:jonpage@mediaone.net</A></DIV>~~~~~~~~~~~~~~~~~~~~~~~~~~~~= ~~~~~~~~~~~~ </BLOCKQUOTE></BODY></HTML>