David Love wrote: >On the contrary, the nap is traditionally put in the opposite direction so >that the jack will not encounter resistance when trying to return to the >"ready" position. > >David Love >davidlovepianos@earthlink.net > > > > Ah... :)... but there is no point to that as the weight of the hammer is not bearing down on the jack during the return. Indeed with proper regulated rep spring and jack there should be so nearly no contact between the jack and roller that the direction of the nap should be a moot question in that regard. Derimot, when the key is pressed and the whippen bears upwards on the knuckle, the degree of contact between the jack top and knuckle is at its greatest, and the jack scraping against the nap is not only uncomfortable but contributes to unnecessary noise and sluggishness as well. Nap Forward ! :) Course there is always the matter of the whip rep lever top and knuckle contact..... RicB just for the record... last time this came up I took the other position. Just for the sake of argument yer understands. >>[Original Message] >>From: Richard Brekne <Richard.Brekne@grieg.uib.no> >>To: Pianotech <pianotech@ptg.org> >>Date: 3/25/2004 12:11:38 PM >>Subject: Re: knuckle orientation >> >>Roger Jolly wrote: >> >> >> >>>Hi Dave, >>> I am chuckling out loud. The debate will start and >>>some will get passionate about it. >>>Global manufacturing will favor the nap as you have described, but try >>>and get a rational reason out of the action makers. <G> >>> >>>Regards Roger >>> >>> >>> >>> >>Come on guys... EVERYBODY KNOWS that the grain should yeild least >>resistance under most stress... ergo the nap goes in the same direction >>as the properly regulated jack during the downstroke. >> >>Shesssh.... :) >> >>RicB >> >> >> >>> >>> >>>> I personally don't think it makes a dang bit of difference >>>>because the >>>>"grain" on most knuckles isn't all that pronounced. Even when trying >>>>to rub >>>>it both ways to see which way it lies, it's sometimes difficult to >>>> >>>> >tell. > > >>>> However, for consistency, you should install them all the same way >>>>(sometimes holding in the light just right and rubbing the leather >>>>this way >>>>and that will show you which way the nap lies). >>>> I just now went out to the shop and checked different makes of >>>> >>>> >grand > > >>>>shanks and two upright butts. They all favored let-off, i.e., the >>>>nap lies >>>>in the direction the jack travels when letting off. >>>> --David Nereson, RPT >>>> >>>> >>>>_______________________________________________ >>>>pianotech list info: https://www.moypiano.com/resources/#archives >>>> >>>> >>_______________________________________________ >>pianotech list info: https://www.moypiano.com/resources/#archives >> >> > > > >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives > > >
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