---------------------- multipart/related attachment --============_-1210664355==_ma============ JD wrote; >I thought from a previous posting you were familiar with it. I'll >get a gif done in the next day or two. Is this the action. Thanks for sending this to the list Clarke. > >As long as the repetition lever center is located in the correct >position (to minimise friction - and it isn't in the Renner/Steinway >style of action), it matters little which wood is used. > > > J > > L R C > H > >In the Herrburger lever JL is 70, LC is 69, LR is 9.5 and R is >almost in line with LC. JC is 50. LH is 47, CH is 30. The jack >tender makes contact 26 mm from C, 4 mm above the line LC produced. John, would you mind explaining the letter diagram you have used above, just to avoid confusion. Thanks. > >>Reduced to essentials, the action consists of nothing but points, >each of which consists of contacting surfaces. >> >>Sure, but in the case of the majority of contemporary actions, >>little attention has been given to friction control. The >>roller/knuckle contact scrubs badly since the contact is around 8 >>mm below the line of centers at the rest position. > >Yes. The actual figure will vary according to the rest angle of LC, >but supposing it is 8, then reducing LC to 75, as you have done, >will diminish this figure and reducing it to 69 as Herrburger did >will diminish it further How? Ron O -- ______________________________ Website: http://www.overspianos.com.au Email: mailto:ron@overspianos.com.au ______________________________ --============_-1210664355==_ma============ An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/cf/9a/ad/ad/attachment.htm --============_-1210664355==_ma============-- ---------------------- multipart/related attachment A non-text attachment was scrubbed... Name: us424202a.GIF Type: image/gif Size: 8860 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/f9/8f/8e/8c/us424202a.GIF ---------------------- multipart/related attachment--
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