Yamaha electric grand

[robert moffatt piano service]

David,

Contact Ron Giesbrecth, national service manager,
Yamaha Canada       Address - rgiesbrech@yamaha.ca
 
Bob Moffatt
Calgary
-----Original Message-----
From: David Renaud <studiorenaud@qc.aibn.com>
To: Pianotech List <pianotech@ptg.org>
Date: January 8, 1999 7:00 PM
Subject: Yamaha electric grand


>My first experience with such a beast.
>
>The "Piano"
>
>I have a client with a Yamaha electric grand, it has
>wippens, shanks.Hammers  appears
>to be plastic, impregnated with graphite or like substance.
>
>It is a grand action, adjustable as such, but the hammers
>strike a solid barrier,, a metal tab attatched low on the shank
>enters a switch triggering the velocity sensitive electronics.
>
>The problem
>
>Client says touch too light.
>She is a graduate of piano--B.Mus.
>Although she realizes what she has, wants
>to know if I can improve touch.
>
>What she really wants is more control.
>
>Another tech. wants to just stick lead
>in the keys, She knew me from university,
>and requested I take a look:
>
>SO---- here's what I found.
>
>Downweight  55 grams.
>Upweight  40 grams..
>I get 11-12 swings off all tested hammers
>Keys are very tight on balance rail
>Hammer level is a low, very little after touch.
>let off, drop, backchecking is very good.
>
>
>I'm considering doing the following:
>
>1)Repin to about 5-6 swings, increase friction
>in action.
>2)Ease balance rail whole, keys, reduce
>resistance in keys.
>3) Raise sharps 1 mm, and corresponding dip,
>to make hand work a little harder, creating
>illusion of firmer touch.
>4) After this is done, add weight to key if
>she at that point wants me to.
>
>Questions
>
>Anyone out there can give factory specs for these machines.
>
>Any experiences with these machines you want to share,
>and am I missing something in this picture.
>
>                                           Dave Renaud
>                                           RPT
>                                           Hull, Quebec
>                                           Canada
>
>