Hi If a Samick check the depth of the balance rail key hole The binding at the bottom of the hole can cause some weird things that make the touch not just right. Joe Goss BSMusEd MMusEd RPT imatunr at srvinet.com www.mothergoosetools.com ----- Original Message ----- From: "Scott Helms, RPT" <tuner at helmsmusic.net> To: <pianotech at ptg.org> Sent: Wednesday, August 19, 2009 3:34 PM Subject: Re: [pianotech] double-striking hammers on Chinese uprights > David - > > Repinning flanges to address bobbling in uprights works for the same > reason that it does in grands. If the hammers are pinned too loose, there > is too much energy in the hammer assembly during aftertouch and it will > rebound and double-strike. Note that this typically happens on a blow that > isn't strong enough to put the hammer into check, but that IS strong > enough to make the hammer return to the string a second time. > > When you say excessive damper spring tension is the culprit for "exactly > the reasons [I] mention", do you mean that it discourages the player from > following through the keystroke? If so, how does that explain bobbling in > the treble hammers that don't have dampers? And, wouldn't that be a player > technique/education issue and not a piano malfunction issue? > > Scott > ------ > Scott A. Helms, Registered Piano Technician > 480-818-3871 > www.helmsmusic.net > > > > > > >> Why would repining flanges help with double striking? >> >> As I mentioned earlier, and as was discussed in a previous thread, excess >> tension in the damper springs is a common culprit for double striking >> (especially in some new pianos) for exactly the reasons you mention >> below. >> >> >> David Love >> www.davidlovepianos.com >> >> -----Original Message----- >> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On >> Behalf >> Of Scott Helms, RPT >> Sent: Tuesday, August 18, 2009 8:56 PM >> To: pianotech at ptg.org >> Subject: Re: [pianotech] double-striking hammers on chinese uprights >> >> I'm surprised that repinning the flanges didn't help - that always seems >> to do the trick for me. Have you tried reducing the blow distance to get >> more aftertouch? This was actually a thread on this list about a year >> ago, >> and some suggested that damper springs that are too strong could cause >> bobbling, although I've never been able to figure out why that would be >> the case (unless it just discourages the player from following through >> the >> entire keystroke) ... >> >> ------ >> Scott A. Helms, Registered Piano Technician >> 480-818-3871 >> www.helmsmusic.net >> >> >> >> >> >> >> >> >> >> > >
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