Weighing Off the Grand Action - Part 3A

Weighing Off the Grand Action - Part 3A

Regulation Strategy Review:

A well-executed weighoff hones good grand regulating to exceed customer expectations. And the Grandwork System provides a weighoff-worthy regulation every time, with much of the work (including weighoff) performed on a bench off-site, a benefit to both customer and technician, particularly in this time of pandemic.

A simple list describes the process:

  1. Assess condition and eliminate obstructions
  2. Test bedding and correct (no pedal yet)
  3. Take samples of bedding and strike
  4. Fix action position on benchtop
  5. Set up bedding first, then strike
  6. Create spacing scale along strike profile
  7. Sample full regulation on 2-3 notes, choose specs, and validate
  8. Prepare parts and materials
  9. Re-pin hammers and rep levers as needed
  10. Make parts work vertically – particularly hammers
  11. Regulate globally (not sectionally)
  12. Follow best order of operations from checklist
  13. Weigh off for either consistent downweight or consistent balanceweight
  14. Touch up regulation for consistent aftertouch
  15. Install action in piano and touch up bedding with pedal
  16. Tweak hammer spacing
  17. Pre-lift wire for stability and adjust pitch
  18. Fit strings to hammers (mating and leveling in one step)
  19. Regulate dampers to leveled strings
  20. Regulate trapwork and pedals
  21. Tune, touch up hammer fit, and voice

What goals aim this work? Another simple list:

  1. Hammers vertical at strike, pre-voicing all soft pedal positions
  2. Hammer travel vertical to maximize power and repetition
  3. Hammers mated with strings at pitch and in tune
  4. Even and sufficient action friction 
  5. Consistent and adequate aftertouch
  6. Least compromise in specs throughout
  7. Most even hammer weights given constraints
  8. Consistently balanced upweights and downweights

And even simpler:

  1. Stability
  2. Consistency
  3. Responsiveness
  4. Dynamic range
  5. Tone

The entire regulation prepares for voicing. The consistency achievable with this system simplifies and enhances performance, power, and tone. Strings well-fit to vertical hammers produce clarity at all dynamic levels and incremental soft pedaling. The strategic preparation assures no surprises and speeds implementation.

  • Part 1 "Why Weigh Off?" 
  • Part 2 "My Strategy" 
  • Part 3 "Method and Style"
  • Part 4 "Pragmatics"
  • Part 5 "Trials and Errors"
  • Part 6 "Levers"
  • Part 7 "Playing with Proportions"
  • Part 8 "Weight, Friction, Inertia, and Distance"
  • Part 9 "Plan by Number?"
  • Part 10 "Best Balance for Best Art"
  • 1 comment

    Mike Dugan

    Thank you for the amazing information! Greatly appreciated!

    Mike Dugan

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