------ =_NextPart_000_01BC1909.4BA2ECE0 Avery, Very nice, complete post on the problem. Jim's note is very true at = times - the pianists often are not playing through letoff. Reducing the = resistance at letoff helps this, so roller shape, jack regulation, = roller lubrication, and damper timing all should be checked if the = problem comes from not playing through letoff. Reducing this resistance = will lower the threshold volume where the pianist does not go through = letoff. As a result, when the pianist DOES play so softly as to not go = past letoff the hammer has less momentum and is less likely to bobble on = the string. If lowering the drop screw a little does NOT help the bobbling, then the = pianist is not going through letoff. If the pianist is playing through = letoff, then you need to look at some other things (besides just leaving = the drop screws and letoff low): - The backcheck angle may be too steep, causing the tails to bounce off = the backchecks on soft playing. Try bending the backchecks for a = straighter angle, causing a softer but more reliable (on soft blows) = checking. - Arc of the hammer tail may be too abrupt, causing the same affect. - Backcheck may be too low - not in terms of checking height, but in = terms of height off the key. During soft play the hammer can bounce too = high up on the backcheck skin, and won't grip well. - The rep springs may be bent wrong, angled upward instead of having a = smooth arc. This puts the spring tension too close to the balancier = center pin and can contribute to strange hammer rise. - The balancier center may be too loose. Measure ~4 grams at the drop = cushion, ~6 grams if the hammers are heavy. Let us know if any of these help. Don Mannino RPT, Manager Kawai Piano Technical Support, U.S. and Canada (Don_Mannino@compuserve.com or DonMannino@worldnet.att.net) ------ =_NextPart_000_01BC1909.4BA2ECE0 eJ8+IhEBAQaQCAAEAAAAAAABAAEAAQeQBgAIAAAA5AQAAAAAAADoAAEIgAcAGAAAAElQTS5NaWNy b3NvZnQgTWFpbC5Ob3RlADEIAQ2ABAACAAAAAgACAAEEkAYAEAEAAAEAAAAMAAAAAwAAMAIAAAAL AA8OAAAAAAIB/w8BAAAAQQAAAAAAAACBKx+kvqMQGZ1uAN0BD1QCAAAAAHBpYW5vdGVjaEBieXUu ZWR1AFNNVFAAcGlhbm90ZWNoQGJ5dS5lZHUAAAAAHgACMAEAAAAFAAAAU01UUAAAAAAeAAMwAQAA ABIAAABwaWFub3RlY2hAYnl1LmVkdQAAAAMAFQwBAAAAAwD+DwYAAAAeAAEwAQAAABQAAAAncGlh bm90ZWNoQGJ5dS5lZHUnAAIBCzABAAAAFwAAAFNNVFA6UElBTk9URUNIQEJZVS5FRFUAAAMAADkA AAAACwBAOgEAAAACAfYPAQAAAAQAAAAAAAACiy8BBIABAB4AAABSRTogImRvdWJsZSBzdHJpa2lu ZyIgcHJvYmxlbQBMCgEFgAMADgAAAM0HAgAMABEAFQAxAAMAPAEBIIADAA4AAADNBwIADAARAAAA HwADABUBAQmAAQAhAAAAOTY4Mzk2NTBCNjg0RDAxMUJDNTYwMDQwMDUxNjJENUIA1QYBA5AGAOQG AAAUAAAACwAjAAAAAAADACYAAAAAAAsAKQAAAAAAAwAuAAAAAAADADYAAAAAAEAAOQCgsk9JTBm8 AR4AcAABAAAAHgAAAFJFOiAiZG91YmxlIHN0cmlraW5nIiBwcm9ibGVtAAAAAgFxAAEAAAAWAAAA AbwZTElPUJaDl4S2EdC8VgBABRYtWwAAHgAeDAEAAAADAAAARVgAAB4AHwwBAAAAQAAAAC9vPUth d2FpIEludGVybmF0aW9uYWwsIEluYy4vb3U9V09SS0dST1VQL2NuPVJlY2lwaWVudHMvY249ZG9u TQADAAYQSxs6+QMABxCgBQAAHgAIEAEAAABlAAAAQVZFUlksVkVSWU5JQ0UsQ09NUExFVEVQT1NU T05USEVQUk9CTEVNSklNU05PVEVJU1ZFUllUUlVFQVRUSU1FUy1USEVQSUFOSVNUU09GVEVOQVJF Tk9UUExBWUlOR1RIUk9VRwAAAAACAQkQAQAAACwFAAAoBQAAyggAAExaRnUqdPy9/wAKAQ8CFQKk A+QF6wKDAFATA1QCAGNoCsBzZXRuMgYABsMCgzIDxQIAcNxycRIgBxMCgzMPfxCELn0KgAjPCdk7 Ft8yNR41AoAKgQ2xC2BuZzG8MDMUgAsKEvIMAWMAQGUT0HYEkHksCoUKhVaFG+EgAwBjZSwgBaAG bQtQEgBlIHBvc+MFQAIgIHRoHiEDYAJgoGVtLiBKB3AnBCBsbm8eEQQAIBvSHrByqQpQIGEFQHQH cy0etO8HMAMAHmAEIG8BgAnwIQCvFuAf4h4wC2B5C4BnHrFhA2B1Z2ggHfEikGblH3BSCYB1YyO0 HiAW4L8AkB5gAHAdcCECJHQgHtA8bHAEIB7ABAAdkHNvryWwBvAd8AXAcxHAcB2BymoA0GslsWd1 C2AhQK8CIB2QKAUKQGIFEGMpheEAcGQgZGEd0ChBIUFfI7IHQAMgKHAIYGwrUGL3HiARsAWQawmA IDAm8B7J/x2iB5EDUiMvJD8v1CBBJcn3A/AsYRZwdyuyHtEwEQeQ6yygLNF2BvB1B4AykB7QtyMB IckrYG8HkS9SZyfgtzAeE9AEIGElsilgdB2QxzShHqU1VURPRQXwL5LXJ8In0AGAbB0wYSdRJ+C/ NhUKsB5hJqUewhHAbQeA/wXAEcAEIB3wBBEEYAeAAjDPNGArIyBBPTNsaS1wOoH7OuEG4GIfMR6G HmAFEBngui4cLEkm8DLzJUZkA2D+cCfABQAH0TfAPtACQD+x8TXDTk9UJwMesz9zL9H/HZAewTic IEE2FC/fN1JBoe9F/S+fMKNFhXkIYB1ACeD3K1A64RZwbykQIREn0DRx3yAANLEnYhngBCAoLQAA kJMNsAQganU7o2F2Qi+edzehK0EmpTLxKTocLL0hoFRE0ijxLTMrIWc/sT8AwB0wLQEwsDohHhBl cP0dkWFOgCVGAZADEDrDBuD+dSYyPAZShyJxA6A6Qkmm/R9wVB0hLQArQCVGVukCEP8FwDfAQFEL cDBgHhBacVMyz1SIWpEikgXAYnUFQARg3yMBFuA+0AGgP7EoV5YCYHkzAHMpLSRAiSGgBxBj/yKB PDpVYlN6AaAg0AUwVIxecyuAIPEN0AWQdF+IQv9Sl1OJMvEhkS9SC4AesASQ/m0icl73JwFa8h2Q XOJmytdoFFZXLXB5H3BECHFKAf9Xxzw6KrADoFX1U/IngDBht2JwHoZSiHNfQSsUdwIg3ic2MQUR MpAnIGxfiFJCfxbgQtETkE2TU4VY4QVAd98DYEViUyMrUGJwdwsRZrH9VDFhK1BpYk7kWpEEYE0R 7SLhY1iBMbJwXPAnUkAx33HTZuEAgR6SVAFjFnAR8P860lakGcElMGxiPbEoQSIA/yLRK0FskgWg AjAFEFzheKP/WrIZ4DxnBRAR8HCseT9lezt4gR9wTU7QOAAjAX4033ABK4A3oSEhQnZjToAngPkp sn42gMUttTyEN6EjAe8e0E7gaqAcLEwSAG3ABCD+ax/wB+AtsQBwHTBgZHiRrycSQL0aTxtVRB6R TQBwZwMAH/AH8FBUHZCKMWElfDByiAVLYXQAaSDWUCIRJ+BUBZBoHVEHQB8GAGJwHkAAIB2QVS5T +x9wKzJDixErcAtGFIIbVfOIB4joMTYbcgxATdCJ8XpfijVAHbJOgASQG9Auvx2xHoAFwInxkgZv sHIs0N9LwGQgIRBkIJShKY7KkSDzh/w+0DM2DfCI3B8BHhAXZBAchhYBAJmQAwAQEAAAAAADABEQ AAAAAEAABzBgflxPSRm8AUAACDBgflxPSRm8AR4APQABAAAABQAAAFJFOiAAAAAAAwANNP03AADW JA== ------ =_NextPart_000_01BC1909.4BA2ECE0--
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