[pianotech] Lost motion in Spinets

[Bruce Browning - The Piano Tuner]

> Julia,
Your original question about tugging on the hammer rest rail will give you
a test for "degree" of lost motion.
If the hammer does not move when lightly tugging on hammer rest rail, then
the jack is hard under the hammer butt, and may require a little more lost
motion.
If the hammer follows the hammer rest rail, then you may have too much
lost motion, and need to adjust capstans accordingly.
Use a combination of hammer rest rail tugging and key rear tapping to
determine acceptable amount of lost motion.
Bruce Browning
The Piano Tuner.