This is a multi-part message in MIME format. ---------------------- multipart/related attachment ------=_NextPart_001_004A_01C337EE.C1774870 Hi, what a great setup ! It may certainly produce the same effect on touch that the assist springs. I am unsure of the magnets, I used to buy some ceramic magnets in time, and they where VERY expensive, and very strong, don't get demagnetized with time, and so on. Are they the same or the same kind, that should price less actually. Amazing, congratulations Ric. I may think about it now ! Greetings. Isaac OLEG Entretien et reparation de pianos. PianoTech 17 rue de Choisy 94400 VITRY sur SEINE FRANCE tel : 033 01 47 18 06 98 fax : 033 01 47 18 06 90 cell: 06 60 42 58 77 -----Message d'origine----- De : pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]De la part de Richard Brekne Envoye : vendredi 20 juin 2003 16:45 A : PTG Objet : Re: Virtual Capstan Hi folks I managed to find a few Neodym Magnets of an appropriate dimension today. These are much stronger and probably more or less what should be used for this application. Each weighs about 0.8 grams, and has quite a bit more energy then the ones I posted figures for earlier on. So below is a picture with a very basic way of installing them and the resulting figures. I changed a tight center on the hammershank flange so the non magnet figures are slightly different. We have: 30 grams FW No magnents DW/UW 50/31 Magnets at 10 mm seperation DW/UW 48/30 Magnets at 6 mm seperation DW/UW 43/26 Total weight of the added parts was 6.3 grams Not much mass, lots of distance, and more effect then will ever be needed. One thing I noticed already about the touch. The key gets an extra shove down, yet there is no real bump with the wippen coming back into contact... because the magnets insure a soft landing as it were. Cheers A good technician friend of mine and I are going to work up a really nice installation proceedure and presentation after we finish refining this angle on the idea and testing it out on an August Forster Grand. Total cost... about 3 hours work for installation, and about 40 cents a magnet or just under a 150 dollars if you use four as in the example. Looks to me tho that you could easily use just 3, if not 2 and still get plenty effect while still leaving more then ample space for regulating the standard capstan. -- Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway mailto:rbrekne@broadpark.no http://home.broadpark.no/~rbrekne/ricmain.html http://www.hf.uib.no/grieg/personer/cv_RB.html ------=_NextPart_001_004A_01C337EE.C1774870 An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/9f/fb/b2/d8/attachment.htm ------=_NextPart_001_004A_01C337EE.C1774870-- ---------------------- multipart/related attachment A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 52689 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/db/87/b4/05/attachment.jpe ---------------------- multipart/related attachment--
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