Another picture of the action ratio gauge and an instruction sheet Dale Erwin R.P.T. Erwin's Piano Restoration Inc. -----Original Message----- From: Dale Erwin <erwinspiano at aol.com> To: Erwinspiano <Erwinspiano at aol.com> Sent: Tue, Jan 15, 2013 9:52 pm Subject: Re: [pianotech] measuring action ratios Dale Erwin R.P.T. Erwin's Piano Restoration Inc. Mason & Hamlin/Steinway/U.S. pianos www.Erwinspiano.com Phone: 209-577-8397 -----Original Message----- From: David Love <davidlovepianos at comcast.net> To: pianotech <pianotech at ptg.org> Sent: Tue, Jan 15, 2013 9:20 pm Subject: Re: [pianotech] measuring action ratios Here are two photos. -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of David Love Sent: Tuesday, January 15, 2013 9:13 PM To: pianotech at ptg.org Subject: Re: [pianotech] measuring action ratios A simple block of wood with an extension (mine is a machine screw) that lays across the keys and that depresses a key exactly 6 mm whereby you then measure the amount of hammer travel and divide that by six to give the action ratio. It's been posted several times on the list by Dale Erwin and others. I'll post some pictures if I can find one. David Love www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Joseph Garrett Sent: Tuesday, January 15, 2013 8:24 PM To: pianotech Subject: Re: [pianotech] measuring action ratios David L said: "When analyzing actions I've used both the gauge for measuring key travel versus hammer travel as well as the actual measuring and multiplying out the three separate lever arms." David, What gauge are you referring to? Joe Joe Garrett, R.P.T. Captain of the Tool Police Squares R I -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20130116/0adaafc9/attachment-0001.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: Hammers-Action Ratio instructions.doc Type: application/msword Size: 239104 bytes Desc: not available URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20130116/0adaafc9/attachment-0001.doc> -------------- next part -------------- A non-text attachment was scrubbed... Name: action_ratio_3.JPG Type: image/jpeg Size: 2585682 bytes Desc: not available URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20130116/0adaafc9/attachment-0002.jpeg> -------------- next part -------------- A non-text attachment was scrubbed... Name: action_ratio_4.JPG Type: image/jpeg Size: 2453904 bytes Desc: not available URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20130116/0adaafc9/attachment-0003.jpeg>
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