A method for uprights I found in a very old journal, even before it was
PTG, was to first make sure the dampers are lifting evenly with the
pedal. Insert a wood wedge under the damper lift rod from the side so
that the rod is firmly engaged to the dampers without actually lifting
them off the strings. They might slightly "leak". You can check for
evenness of pressure at this time and refine that. Next put another
wedge under the hammer rail so the hammers are about half way to the
strings. Tap a few keys to see if any of the hammers and dampers wink
at the same time. If there are you can mark these as your trials. If
you want a heavier touch move the hammers back slightly by moving the
hammer rail wedge out.
Remove the action to the bench with the spoon side toward you without
changing the wedges' positions. Gently tap up on the wippen and bend
the spoons so the hammer and the damper wink at the same time, the way
your trials do. When you're satisfied they are all consistent remove
the wedges and return the action.
------Original Message------
There's been some very good advice. I do bench regulation of spoons exactly as Jon Page does, though I prefer to do it in the piano (I do it on the bench when it is WAY off, to rough it in quickly).
I'll add that I always adjust spoons with the keys out, if it is an action without stickers. This means that moving from one wippen to the next is a matter of disengage (rotate), move the tool in less than 1/4", move to the next, move the tool back toward you less than 1/4". Very easy to stay at the right distance. It also means that you have that extra distance for the tool to move down. Usually it is best to hold the tool stationary at a point where it is bearing solidly on the spoon, and do the actual bending by moving the wippen with you other hand.
Also, note which way the spoons are bent: look at the hammer butt relative to the damper lever. Which way is the damper offset from the butt? Angle your tool to match that angle. Otherwise you will not get purchase on the spoon with the slot.
I'll also mention that Jim Busby has made some some fantastic videos. Go to www.pianotechniciantutorials.com. He covers spoons under Vertical Piano Regulation.
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Fred Sturm
University of New Mexico
fssturm@unm.edu
http://fredsturm.net
http://www.artoftuning.com
"We either make ourselves happy or miserable. The amount of work is the same." - Carlos Casteneda
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Original Message:
Sent: 10-13-2015 12:22
From: Floyd Gadd
Subject: Damper timing
Hi Geoff,
Regulating dampers in the upright (as opposed to on the bench) is worth mastering, as frustrating as it is. A few things that have helped me on my way:
- grinding the head of the tool with the double bend (Schaff No. 85, for instance) so that it is narrower and will fit more easily through tight spaces
- marking the position on the stem of the tool (while trial regulating on the bench) of the front of the wippen, using a magic marker, for reference when the action is back in the piano
- understanding that the overstrung bass strings may well block access for the tool mentioned above, making necessary the use of something like Schaff tool No. 3114 in the lower part of the piano. Tool No. 85 works best mid-tenor to treble.
- Learning to use tool No. 3114 works best in sections where there is lots of sideways bend on the spoon. Once you get the hang of it, it becomes possible to use on the others as well.
- Regulating with the keys removed from the piano. I learned this in Atlanta from Mike Carraher and Keith Bowman.
- Maybe most importantly, learning to do it in my shop, not in a customer's home. This is not a skill you want to cultivate under pressure of time. There are a number of skills that I've needed to fail at for a while before succeeding. Like hearing the beating of fourths when they move below two beats per second.
I have experimented with regulating upright dampers outside of the piano, and have never been able to achieve the precision that is possible with regulating with the action installed in the piano.
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Floyd Gadd
Regina SK
306-721-9699
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