[pianotech] Wandering Capstan Screws

[david at piano.plus.com]

Jim, thanks for that interesting suggestion, and I will certainly check it
out.  But to be honest I doubt if there's a pinblock problem, because I've
been tuning the piano for twenty-three years, and the tuning is always
pretty stable.

Best regards,

David.
www.davidboyce.co.uk


> David;
> Your photos of the action look eerily similar to the situation I
> encountered early this year. My situation involved a piano with a
> structural defect where the pinblock had separated from the frame and the
> result was a warping of the entire plate and pinblock and an uneven gang
> of
> gained and lost motion on the capstans. Room rearrangement and
> somnambulism
> aside, try checking the pinblock to see if there is any separation either
> at the top or bottom (or both) from the frame. I had a situation at a
> school where the bottom of the pinblock had twisted away from the frame
> but
> it wasn't visible from the top as the pinblock was still secure to the
> frame at the (easily visible) top. By the time I got done tuning half the
> piano, the starting point was way out again. So try looking in the back
> under the pinblock also.
> Jim
>