<DIV>Hello Bob,</DIV>
<DIV>Where can I find definitions and how to measure these various quantities you folks are discussing. It sounds very interesting but I am in the dark! SW, DW, UW, FrontW, WBW etc... etc... etc... Thanks for your reply.</DIV>
<DIV> </DIV>
<DIV>Clyde Allen</DIV>
<DIV>Silver Spring, MD</DIV>
<DIV><BR><BR><B><I>Bob Hull <hullfam5@yahoo.com></I></B> wrote:</DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">Hi Richard,<BR><BR>Thanks for your reply.<BR><BR>you wrote: Stanwood suggests given SW curves for<BR>> each Ratio and BW... <BR>> tho you dont see that on most of the Smart Charts<BR>> published.<BR>> <BR>> If you give us some more specifics, perhaps we can<BR>> offer better advice.<BR><BR>Where are these sw curves suggested in correlation to<BR>particular ratios and BWs ? You referred to a number<BR>10 curve. I'll give some more details here about this<BR>action. This is with the new hammers.<BR><BR>N SW D U BW FrontW R WBWAvg.<BR>___________________________________________________<BR>1 12.1 56 27 41.5 37.5 5.7 9<BR>2 11.6 56 27 41.5 32.9 5.6 9<BR>9 11.5 50 23 36.5 39.0 5.78 etc.<BR>10 11.7 53 28 40.5 32.6 5.4 <BR>16 11.4 48 20 34 40.8 5.7<BR>17 11.1 48 21 34.5 37.1 5.6<BR>28 10.8 48 25 36.5 32.1 5.5<BR>29 10.4 44 19 31.5 35.2 5.5<BR>40 9.7 31.6<BR>*(40 10.8 48 26
37 31.6 5.5)<BR>41 9.6 40 17 28.5 33.1 5.4<BR>52 9.5 44 22 33 29.2 5.6<BR>53 9.3 46 21 33.5 27.2 5.5<BR>64 8.3 46 27 36.5 20.3 5.7<BR>65 8.2 44 26 35 19.3 5.5<BR>87 6.6 49 29 39 6.8 5.5<BR>88 6.4 50 34 42 3.5 5.7<BR><BR>(*C40 had 1.1 g temporarily added to the hammer)<BR><BR>Do I understand that BW should be fairly constant<BR>across the keyboard while SW, Frontweight and<BR>downweight are going to smoothly decrease? Although,<BR>downweight may just decrease from 52 to 48. <BR><BR>Also, for good tonal projection is a sw of 12 enough?<BR><BR>I hope this info will help you advise me if you don't<BR>mind. Thank you.<BR><BR>Bob<BR><BR><BR><BR>> Hi Bob<BR>> <BR>> You dont really leave us much to go on here to offer<BR>> any real advice. <BR>> One of the great assets of Stanwoods method is the<BR>> whole slew of terms <BR>> and definitions that allow us to easily converse<BR>> about and understand <BR>> any given touchweight situation. You mention a 5.5<BR>>
ratio as an optimal, <BR>> and that you are having problems dealing with<BR>> appropriate Frontweights <BR>> for a given Strikeweight curve.. without mentioning<BR>> what that curve is.<BR>> <BR>> To begin with... A 5.5 ratio will yield a number 10<BR>> (if I remember <BR>> right) curve assuming a 9.0 whippen radius weight<BR>> and a 38 gram BW. <BR>> This will also yeild the maximum Front weights<BR>> published in the Stanwood <BR>> kit.<BR>> <BR>> From that perspective... it doesnt really matter<BR>> which you do first.. <BR>> All that matters is that you do your diagnostics<BR>> right and arrive at the <BR>> correct Balance Weight Ratio... (SWR).<BR>> <BR>> <BR>> The point is... when you know your Ratio, have<BR>> decided upon your desired <BR>> BW... the rest is more or less given. You can<BR>> juggle SW curves if you <BR>> want... but <BR>> <BR>> Cheers<BR>> RicB<BR>> <BR>> <BR>> Bob
Hull wrote:<BR>> <BR>> >These are questions about component touchweight<BR>> >balancing with the SmartChartTM.<BR>> ><BR>> >I have put new hammers on an action and I'm working<BR>> on<BR>> >getting the strike weight smoothed. There are a<BR>> good<BR>> >many keys that exceed the front weight ceiling. The<BR>> >leading doesn't "look" excessive like some leading<BR>> >I've seen before. <BR>> ><BR>> >A strike weight ratio of 5.5 is what I understand<BR>> to<BR>> >be best for this piano. <BR>> > <BR>> ><BR>> why... specifically ?<BR>> <BR>> >Should the front weight issue be adressed first<BR>> even<BR>> >if it has to be adjusted again? The strike weights<BR>> >will need to be adjusted mostly upwards. <BR>> ><BR>> >I'll appreciate your comments.<BR>> ><BR>> >Bob<BR><BR><BR><BR><BR><BR>__________________________________________________<BR>Do You
Yahoo!?<BR>Tired of spam? Yahoo! Mail has the best spam protection around <BR>http://mail.yahoo.com <BR>_______________________________________________<BR>pianotech list info: https://www.moypiano.com/resources/#archives<BR></BLOCKQUOTE><p>__________________________________________________<br>Do You Yahoo!?<br>Tired of spam? Yahoo! Mail has the best spam protection around <br>http://mail.yahoo.com