Alan's Maxim and partial answer to: Puzzler for a rainySundayafternoon ...

[Alan Barnard]

HiyaRicB ....

I think you missed some of the play-by-play in the middle inninings, here.
:-)

The adjustment was to lower the jack (raise the lever) not quite half a
smidgeon. Prior to that, the hammer would not drop no matter where I set
the drop screw. Very strange.

Alan Barnard
Salem, Missouri


> [Original Message]
> From: Ric Brekne <ricbrek@broadpark.no>
> To: <pianotech@ptg.org>
> Date: 11/01/2005 7:11:43 AM
> Subject: Alan's Maxim and partial answer to: Puzzler for a
rainySundayafternoon ...
>
> Hi Alan
>
> I have to admit I am a bit confused at this point.  What you write below
would point me in the direction of  the drop screw being,engaged after the
lettoff button and both happening at least a tad too late.  If you have
lettoff set to 1 mm for example, and  drop screw comes into play after this
moment, then the rep lever will push (via <<aftertouch>>) the hammer into
the strings.  But in this case the action is pretty far from being close to
a ball park regulation. Increasing key travel by removing punchings will
just exhasperate the problem. 
>
> The initial relationship between jack top height /rep lever height doesnt
bear on this per se,  as one can still insure that the drop screw engages
at the same time as the letoff button.  What  WILL be a problem in the case
of the jack top being to high is that it will have difficulty getting back
under the knuckle after letoff.... especially in soft play. Putting the
jack top high enough and you will indeed completely take the rep lever out
of the equation all together, and have an unplayable piano to boot :)
>
> So... why dont you clear all this up for us and tell us what the actual
problem was and what  tiny weeny itty bitty yellow polkadotted adjustment
saved the day for you ?
>
> Cheers Alan
> RicB
>
>
> Alan writes:
> No, no, no ... Now I see where I have confused everyone a little. In that
> the jack top definitely got out from under the knuckle, it did let off.
> What wasn't happening was any hammer drop. In the vertical, that hammer
> changes direction at letoff, so I was thinking (well maybe) "No drop, no
> letoff."
>
> I think that the jack must have been high enough that when the lever hit
> the drop screw the knuckle just sat on the jack top, or the back edge
> thereof, and never fell to the rep lever. Then in the aftertouch, the
lever
> just swooped up and picked up the knuckle off the jack. But it seems the
> jack would have to be awfully high to stay in the ball game after rotating
> out and, as I say, it certainly didn't LOOK way out of spec.
>
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