KS 11: Bedding and Action Elevations
By Christopher0 comments

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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KS 10: Bedding the Balancerail
By Christopher2 comments

KS 10: Bedding the Balancerail

Bedding the Balancerail:

There are three principal styles of grand keyframe balancerail - the stiff, Steinway/Mason & Hamlin style supported by adjustable glidebolts, the more flexible Asian style with glidebolts plus hidden glidebolts for action elevation, and an awkward alternative with no glidebolts. In all three cases, the balancerail fit can be affected by any of the previous steps being off, so first steps first.

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