This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Thanks for the input David. Comments interspersed: With a .55 key ratio you definitely need a 17 mm knuckle, probably an 18 = mm but they don't make them. Ideal situation would be if the action = would accommodate a capstan move to .52 with a knuckle at 17 mm. = Variations in the leading and balance weight with a non conforming SW = curve accounts for the range of BWs through the action. Friction range = is too great. Check the key easing on the high ones and remeasure = balance weights to see if that's the problem. Remeasure the bore = distance (string height to flange center) and see if the hammers are = bored correctly. Improper checking might be due to improper tailing or = incorrect backcheck angle.=20 Haven't checked where all the friction is coming from - but sure, we = need to do that. And that's what I was getting at when I stated crappy = hammers. Hammers (they are new) overstrike, and are bored at an angle so = that the nearly squared-off tails stick outward to the rear - these = things will never check as is unless maybe you put some bubble gum on = each backcheck. The action needs new hammers, bored properly with tails = arced properly.=20 Best fix: =20 1.. Remeasure hammer bore dimension and either replace the hammers or, = after removing from original shanks, plug and redrill if they are wrong = (a little tricky when they are already tailed, but can be done. (4 = hours)=20 2..=20 Yup. Would like to just replace. 1.. Dry fit onto new 17 mm shanks and smooth strike weights using a = table saw for clean tapering. Retail to correct radius. With .55 key = ratio you will need SWs on the lighter side. Do some samples and = determine if your curve will allow you to move the FWs back down below = maximums. If you are unable to get the hammers light enough to bring = the BWs down with reasonable FWs, experiment with a capstan move to .52 = or as far as you can without going off the cushion. Double check your = new BW/FW relationship with some samples. (4-8 hours)=20 Sounds good!=20 So you would recommend consistent BWs across the keyboard over smooth = FWs (if I am reading you correctly), i.e. sacrifice perfectly smooth FWs = to achieve consistent BWs? 1.. Install new hammers. (3 hours)=20 Would love to. 1.. Bench regulate and address friction areas checking keys and = pinning. Include check of backcheck angle and/or new leather. (4-6 = hours).=20 2.. Reweigh action by charting BW for each note and then remove lead = at 1:1 ratio (1 gram off FW reduces BW by 1 gram) to achieve desired BW. = (4 hours)=20 3.. Take to customer and do final reglation, tuning and voicing in = piano. (4 hours)=20 4.. Give bill (estimate 22 - 28 hours plus pick up and delivery, plus = shanks, plus new capstans if needed-add 3 hours and a new set of hammers = if new hammers are in order) collect money go home and drink beer. Your = mileage may vary.=20 David Love davidlovepianos@comcast.net=20 Thanks for your input. Phil? - time to put your salesman's hat on! Terry Farrell ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/d6/a9/7e/69/attachment.htm ---------------------- multipart/alternative attachment--
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