I'm setting up a new Renner Steinway upright action, and i have it in what i thought was a good position, but when i tried a few samples, i found that i need to lower the let off button way too far down!...
What would cause this??-The position for the let off rails was pre drilled by renner, and looks normal..
Obviously, i could re drill the holes for the rails lower down, but i would rather not do that before understanding why!
The hammer bore is the same as original, but the action was a bit different,(in that the hammer flanges were linked to the dampers before.)
I'm also confused about the relationship between the adjustable hammer rest rail and the action mount adjustment (these)...
As the hammer rail is adjustable too, at this stage,how do you know whether to set up the blow distance by using the hammer rest capstan or the action mounts?
I'm concerned that the action is too far back/forward but i have just adjusted the hammer rest capstan to compensate.
I have a 5mm difference throughout between the top of the shank and the bottom when the hammer is hitting the strings.magic line is good. key ratio is 1.5:1.
Any upright action designers out there fancy this challenge??-I would be most grateful for ANY help and general tips on upright action geometry!
Bonus question: What angle should the jack be at let off?
I also have the PTG journal DVD, if anyone know of any articles that may be helpful?