"I don't put much tip on the tuning pins..." How do you determine how much angle? Isn't this determined by each individual plate - and may even vary from one section of a plate to another (agraffe section vs. capo section)? Terry Farrell ----- Original Message ----- From: <BobDavis88@aol.com> To: <pianotech@ptg.org> Sent: Saturday, June 21, 2003 1:47 AM Subject: Re: Bolduc Block - Bit Size - Torque > Richard.Brekne writes: > > > You say you drill out of piano. How is it you insure that the pin holes > > are exactomundo - right on the button-no bones about it - perfectly in the > > right spots each and every time. > > I use methods similar to those already posted by others. Set of center > punches to mark the holes. if I err, it's on the side of very slightly too small a > punch, set towards the keyboard side of center. I don't put much tip on the > tuning pins, and this gives me a little insurance against them rubbing the plate. > Incidentally, I've tuned pianos where they DID rub the plate, and I didn't > find it a problem. > > I think the most important part is the careful fit of the block to the > flange. We try to have almost continuous contact along the flange, clamp the block > to the plate (vertically and horizonally) to insure good location for the > screws, and leave the clamps and screws in place while marking for the pin holes. > > After it's drilled, we screw it back to the plate to check the holes. I'm > sure I'm the only person in the world who has ever missed (wandering bit, hard > spot in the block, etc.), so I'll just confess if it's a tiny bit off, I enlarge > the plate hole slightly, in the direction I need to, with a round file. It > doesn't show. If it's off more than a hair, I plug and re-drill. When all is > satisfactory, we spray the plate. > > Bob D >
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