At 11:04 PM 7/19/99 -0600, you wrote: > >>Note DW UP BW FR >>C1 53 36 46 8.5 >>F1 56 36 44 10 >>C2 48 33 40.5 7.5 >>F2 54 33 43.5 10.5 >>C3 54 33 43.5 10.5 >>F3 56 33 44.5 11.5 >>C4 52 32 42 10 > >Hi Terry, > you are in the 57gm range where I suggested you would end up. >To Steal a couple of extra grams to drop the weight, you can fudge by >shimmming the hammer spring rail with some 0.050 BR punchings. >You can fudge the sharps by pushing them back 1mm. How ever it may be worth * Wait, if you push the dowel capstan back; you will be moving it closer to the center pin (fulcrum) and the DW will increase. Moving them towards the keys will lower DW and possibly restrict jack clearance at full key dip. Jon Page >while to change the key height from mid C to mid E and analyse the results, >after a few variants you will find the best position. >The up weight is higher than what I have usually found, and this why I'm >questioning key height, along with different results on the sharps. Have >the keys been recovered? Let me guess, YES. Unless about .30" is milled >off the keys before recovering, ( to compensate for the old Ivory) then >this will explain the difference in the sharp/natural relationship. If this >is the case then the only real solution is to recover the keys properly. >To compromise push the sharp capstans back a tad to narrow the gap in the >results. You are likely to end up with the sharp backchecks being uneven. >A good learning experience. inter relationship of, key height, dip, capstan >position, after touch and back checking , If you alter one it effects the >others, it sure helps you to understand how a vertical action works. >Regards Roger. > > > > >>F4 54 32 43 11 >>C5 56 33 44.5 11.5 >>F5 54 35 44.5 9.5 >>C6 54 35 44.5 9.5 >>F6 58 42 50 8 >>C7 58 40 49 9 >>F7 60 42 51 9 >> >>I have had very little to do with weight measurements, so I don't really >>know what to look for. I can see that the balance weights are too high and >>friction is too low in some areas. >> >>I'll have to dig out my reprint book on Hammers and Touchweight and do some >>reading. >> > > >Roger Jolly >Baldwin Yamaha Piano Centre >Saskatoon and Regina >Saskatchewan, Canada. >306-665-0213 >Fax 652-0505 > Jon Page, Harwich Port, Cape Cod, Mass. mailto:jpage@capecod.net ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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