---------------------- multipart/alternative attachment We will order these magnets immediately on Monday. Richard has a web site where you can obtain 'his' magnets. They are=20 inexpensive and very strong. I certainly believe in this man! What an=20 invention. I already forgot about the springs, although I have them in our grand=20 piano. If this works with the magnets I will remove the springs right away and=20= replace them with magnets. EAR On zaterdag, jun 21, 2003, at 12:15 Europe/Amsterdam, Isaac OLEG wrote: > Hi, what a great setup ! > =A0 > It may certainly produce the same effect on touch that the assist=20 > springs. > =A0 > I am unsure of the magnets, I used to buy some ceramic magnets in=20 > time, and they where VERY expensive, and very strong, don't get=20 > demagnetized with time, and so on. > Are they the same or the same kind, that should price less actually. > =A0 > Amazing, congratulations Ric. > =A0 > I may think about it now ! > =A0 > Greetings. > =A0 > > Isaac OLEG > > Entretien et r=E9paration 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=A0: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]De = la=20 > part de Richard Brekne > Envoy=E9=A0: vendredi 20 juin 2003 16:45 > =C0=A0: PTG > Objet=A0: Re: Virtual Capstan > > Hi folks > > I managed to find a few Neodym Magnets of an appropriate dimension=20 > today. These are much stronger and probably more or less what should=20= > be used for this application. > > Each weighs about 0.8 grams, and has quite a bit more energy then the=20= > ones I posted figures for earlier on. > > So below is a picture with a very basic way of installing them and the=20= > resulting figures. I changed a tight center on the hammershank flange=20= > so the non magnet figures are slightly different. We have: > > 30 grams FW > > No magnents=A0=A0=A0 DW/UW=A0 50/31 > > Magnets at 10 mm seperation DW/UW 48/30 > > Magnets at 6 mm seperation=A0=A0 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=20 > needed. One thing I noticed already about the touch. The key gets an=20= > extra shove down, yet there is no real bump with the wippen coming=20 > back into contact... because the magnets insure a soft landing as it=20= > were. > =A0 > <image.tiff> > =A0 > > Cheers > > A good technician friend of mine and I are going to work up a really=20= > nice installation proceedure and presentation after we finish refining=20= > 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=20= > a magnet or just under a 150 dollars if you use four as in the=20 > example. Looks to me tho that you could easily use just 3, if not 2=20 > and still get plenty effect while still leaving more then ample space=20= > 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 > =A0 > > Antares, The Netherlands see my web site : www.concertpianoservice.nl and : www.grandpiano.nl ---------------------- multipart/alternative attachment A non-text attachment was scrubbed... Name: not available Type: text/enriched Size: 4112 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/35/dd/5f/cb/attachment.bin ---------------------- multipart/alternative attachment--
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