Weighting upright keys question

[Farrell]

Yeah, I hear ya. I reserve the process I was describing for high-end uprights.

Terry Farrell
  ----- Original Message ----- 

  I've back leaded a few spinets, it really fixes them. Afterall the keys are easy to pull, it's the actions I don't want anything to do with. Kind of like was stated in an earlier post, I just draw a line after trying a few sample and take them home to the drill press. I don't think it takes much longer than a tuning or two to do this.
  Fenton
    ----- Original Message ----- 

    I also have an interest in learning how to improve upright action touchweight.

    I have done much the same as you write Fenton, but I have on some instruments gone so far as to do a Stanwood-type Strike Weight evening/tapering and even/taper out key Front Weights the Stanwood-type way, i.e. where one eliminates friction from the process. I use a number of sample notes, get the friction as close to target as possible, then evaluate what kind of leading is optimal (DW/UW). Then I take the keys out and put them on the Stanwood-type touchweight stand and weight off FWs to get an even taping on them. 

    After all that, one still may have some inconsistencies in touchweight, which I even out with minor hammer butt spring tension adjustments. I figure this process gets you something like the Stanwood-type optimized grand action - the hammers and keys are all nicely weight evened/tapered, and any touchweight anomalies can be easily rectified by getting friction back into the optimal zone and/or regulating butt spring tension.

    Not sure this the most optimal way to go, but it seems like the closest approach I could find to evening out touchweight on an action, and retain the ability to correct it in the future very easily through friction (first/preferably) and butt spring regulation.

    I haven't done this process on any Gulbranson spinets.   ;-)

    Terry Farrell
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080217/1e81cd0e/attachment.html