[pianotech] Regulation sequence advice sought

[Michael Staples]

I'm studying for my RPT Technical exam and could use some help understanding
and developing a grand regulation sequence.  I'm working with a grand action
model and using Bill Spurlock's recommended sequence from the PTG Technical
exam source book.  I have read that regulation is a circular exercise, which
will get closer and closer with each pass.  I don't believe that all
steps need to be repeated, so I'm looking for an effective, essential
sequence to repeat after the first pass regulation listed below.  Your
comments and suggestions are much appreciated.

Michael Staples
Associate member PTG


First pass:
Install damper and adjust for free wire travel through damper guide rail and
into damper block
Install key and set key height to provided specification (set quickly and
not exactly)
Assemble and install stack
Align hammer to string target
Align wippen to knuckle, capstan and let off button
Square backcheck to hammer tail
Set repetition lever height (visually set jack top to slightly below top of
repetition lever)
Set hammer shank to just above rebound (rest) cushion
Align back edge of jack to back edge of knuckle core
Set 1/8” let off
Set 1/16” drop (3/16” from string)
Set key height to provided specification
Set dip to provided specification
Align backcheck to ½” – ¾” checking
Adjust repetition lever spring strength for smooth, positive hammer rise out
of check
Adjust blow distance to provide adequate aftertouch
Set checking to 5/8”
Set damper lift to begin at 1/2 blow distance
Set damper stop rail (felt) to just above damper lever with key depressed
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