[CAUT] Re: Touchweight, etc.

James Ellis claviers@nxs.net
Mon, 01 Aug 2005 16:40:09 -0400


Fred Sturm checks key friction the same way I do.  The only difference is
that I use some weights I made just for that purpose instead of the Jiffy
leads.  Fred covered several details that I didn't, but it seems that our
methods are the same.

And as for hammers rubbing their neighbors, and keys binding at the balance
hole:  Last year I did a warranty job that was the worst I ever saw.  It
was an otherwise beautiful 7-ft grand by a once high-quality US maker.  The
keys were well made.  The only problem was that the balance holes in their
hardwood shoes were so tight on the pins that the keys had to be carefully
pried off.  Had they been any tighter, they would have pulled the pins out.
 Here I go again with my home-made tools.  I don't like most of the balance
hole easing tools on the market, so I made my owm.  It's the same general
configuration designed to go down from the top to put just the right taper
at the bottom of the hole, but I made this one out of tool steel, hardened
it, and then put an adjustable brass stop flange on the shank to establish
a precise depth, and get all holes just the same.  Even so, those balance
holes in those hardwood key shoes were so tight I had to heat that tool to
make it do the job.

As for the hammers:  Aligning and traveling was out of the question.  They
were just much too fat on the edges.  The original complaint was that the
action was too heavy.  The piano was definitely hard to play, but it was
not heavy.  There were no problems with weight or geometry.  There were
many peoblems with friction, and just as many more with regulation.  Had
those been properly done, the action would have been fine.  Why that piano
left the factory, or even got sold, in that condition is beyond me.

Jim Ellis  


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