KS 29: Where Rubber Meets the Road (Stiff Frame)
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KS 29: Where Rubber Meets the Road (Stiff Frame)

I'd like to briefly look again at where keyframe meets keybed. It's the foundation of our regulating, but because not much of what's at play can actually be seen or directly accessed, we are challenged to apply what we think and see what happens. And thinking evolves. I am familiar with at least four categories of keyframe bedding: the shimmed and securely fastened upright, the full-fitting/no-glidebolt grand, the stiff Steinway/Mason style grand, and the more flexible Yamaha/Kawai style grand. The upright keyframe has...
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KS 11: Bedding and Action Elevations
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KS 11: Bedding and Action Elevations

Bedding and Action Elevations:

Two requests for further thoughts came in this week: David Skolnick on "special problems created by a ‘collapsed’ rigid frame" and Alan Eder on "how to determine whether or not the hidden glidebolts protrude the amount that they should before proceeding to bed the other glidebolts?" Each of these points turns attention to action elevations, an under-discussed aspect of piano design.

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