[CAUT] tail scuffing (was Another Baldwin Question/backchecks)

[Sloane, Benjamin (sloaneba)]

Another consideration for me in checking is the effect aftertouch has on good checking. After the jack clears the knuckle, the key jumps. This is partly why when regulating let-off we use all sort of odd techniques to set it when depressing the key. Does a generous aftertouch cause the tail to bounce off the check when the key jumps after let-off as a result of not immediately being obstructed by the front rail felts, or instead, will a generous aftertouch increase the potential of the tail to bury itself in the check because of the increased velocity of the key after letoff? How would the angle, not only of the check, but the wire itself and the way we drill the key, for angled mounting of wire, or perpendicular, augment the potential for either result?

From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Fred Sturm
Sent: Tuesday, April 14, 2009 6:51 PM
To: caut University Technicians
Subject: [CAUT] tail scuffing (was Another Baldwin Question/backchecks)


On Apr 14, 2009, at 3:33 PM, Paul T Williams wrote:
 Tails need to be scored as well....very smooth..

            I don't like that word, "scored." Rather coarse sandpaper (about 100 grit) is quite enough for good checking. Here are pictures of the jig I use, home made from some tongue and groove flooring and whatnot, I think pretty self-explanatory. Pull each hammer up in turn, the grooves hold the shank, hold the hammerhead with your hand against the top of the jig, back and forth sanding, move on to the next. I use those metal paddles from Pianotek (fit very nicely in the kit). Standard procedure for ongoing maintenance along with brushing knuckles and the like, but a bit more frequent.

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