Doesn't work that way because the amount of change in the action ratio per distance move of the capstan will vary with the overall length of the key. David Love ----- Original Message ----- From: "Richard Moody" <remoody@midstatesd.net> To: "Pianotech" <pianotech@ptg.org> Sent: December 10, 2002 5:52 PM Subject: 10mm = 1 3/4 inch blow I referred to > in that note [Baldwin SD-10] actually had a pretty good action ratio. A 10 mm > dip would produce a blow of only 1-3/4". > > We do service a 40's Baldwin L that regulates to 9.5 mm x 1-7/8". > Bob > If you wanted a 1-7/8 blow from the 10 mm dip, how far would have to move the capstan and which way I assume towards the back check. What I am getting at is there a chart what will show for every mm the capstan is moved the hammer will go up x mm ? Does anyone have a formula I can plug into my spread sheet? ---rm _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives
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