more beginner questions

[Kevin E. Ramsey]

This is a multi-part message in MIME format.

---------------------- multipart/alternative attachment
"I'm working on regulating the action of a Heintzman baby grand.  All my
reference drawings show two separate springs for the jack and escapement
lever but this piano has only one that seems to do both jobs."

    The drawings make it appear that they are two springs, but in fact, =
they are one.

"There is a little tiny screw at the end of the escapement lever(away =
from the roller).
What does it do? "

    It's there so that you  can regulate the height of the jack in the =
window. You want the jack to be slightly lower than the repetition =
lever, by about 10 thousandths of an inch.=20

    "I made all of the measurements for key leveling and dip,
hammer travel and "where the jack trips".  But the touch feels "vague" =
like
theres no power. "

    Well, it's a good idea to begin with the manufacturors =
specifications, but sometimes it's better to be able to know when they =
aren't going to work. In any case, set some samples and see how it works =
out.  The vague touch that you're describing is probably due to the fact =
that you haven't managed to get the left off and drop set up right. =
After you have set your left off, set the drop for about a milimeter and =
a half below that. If you have no hammer rise after drop, you probably =
don't have enough key dip. If the hammer rises significantly, you have =
too much key dip.=20

    What do you mean by "like there's no power"? If you're not getting =
power from the piano, then you probably should re-check that jack to =
knuckle relationship.=20

    Do you know anyone who can check your work?  Are you in the Guild? =
Good idea to get together with your local techs and ask these kind of =
questions, because it's really hard to learn this stuff on an e-mail =
list like this.=20

    
---------------------- multipart/alternative attachment
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/48/fb/89/34/attachment.htm

---------------------- multipart/alternative attachment--