Mechanical Music Digest  Archives
You Are Not Logged In Login/Get New Account
Please Log In. Accounts are free!
Logged In users are granted additional features including a more current version of the Archives and a simplified process for submitting articles.
Home Archives Calendar Gallery Store Links Info
MMD > Archives > February 2014 > 2014.02.14 > 05Prev  Next

Regulating Lost Motion in a Duo-Art Upright
By Niels Berkers

In MMD 140213 Joseph Osborne wrote, "How does one take out lost motion
between the Duo-Art stack and the piano action?  If there is a way to
adjust this without removing the stack over and over again, I cannot
see it."

I've just recently done this; the best method is to remove the head
of the action (spoolbox, roll-motor and roll-corrector) from the stack
(including the tubing).  This gives you access to the top of the stack.
Sliding it in and out can't be avoided, I think, but at least you can
see what you're doing and the stack is way easier to slide back and

I noticed a serious increase in power and playability after the
regulation.  Putting the head back on and re-connecting the tubing was
easier than I expected.  It's certainly worth the job when there's a
lot of play.  I always leave a gap of about 0.1 mm between the player
action and the piano action.  It's barely noticeable  but this ensures
the pianola action doesn't interfere with the piano action on hand

Regards from the wet Netherlands,

Niels Berkers

(Message sent Fri 14 Feb 2014, 15:36:45 GMT, from time zone GMT-0800.)

Key Words in Subject:  Duo-Art, Lost, Motion, Regulating, Upright

Home    Archives    Calendar    Gallery    Store    Links    Info   

Enter text below to search the MMD Website with Google

CONTACT FORM: Click HERE to write to the editor, or to post a message about Mechanical Musical Instruments to the MMD

Unless otherwise noted, all opinions are those of the individual authors and may not represent those of the editors. Compilation copyright 1995-2019 by Jody Kravitz.

Please read our Republication Policy before copying information from or creating links to this web site.

Click HERE to contact the webmaster regarding problems with the website.

Please support publication of the MMD by donating online

Pay via PayPal

No PayPal account required

Translate This Page

. .