bouncing hammers

It is a matter of regulation: there is a proportion between the key dip - hammer-string distance - escapement point. If the supports have also been touched, those too affect the general regulation. What piano is it? Has the action been rasped? Let me know

Paolo

good morning Maestro,

the piano is a RONISCH semi-grand serial number 11240

the hammers are intact, not shaved, depth 4.4 escapement approx 2, 2 in the central section.

some hammers, after touching the string, bounce back and do not rest on the capstan.

What should I work on?

Thank you

But how can it work with a key dip of 4.4 (if I understood correctly)????!!!!!!! I have at least 10mm dip. hammer-to-string distance 45mm. But you also have to check the let-off regulation. Escapement at 12-15 mm from the string. Low notes escapement 2 mm and let-off 2mm. Mid and high notes 1.5 with let-off 1 mm. Also check that the repetition springs are not too lively. The pins must have the right friction and the hammer, after releasing the escapement, must return up with a clean movement, even with unstressed springs!

Yes yes yes, typing error on the PC, excuse me,

depression 10

hammer string distance 4.4

escapement 2 mm

So it seems to me that the parameters are correct and the bounce is probably due to the escapement adjustment, right?

everything to be seen. the escapement lever should be far back. It doesn't seem like a feasible hypothesis to me. anyway, if the hammer bounces, it means the stroke of the escapement lever is not completed. . However, the depth could be insufficient. (send photos of the beginning and end of the stroke. Or a video)

I corrected my previous post because I didn't remember that it was an upright piano. I confirm the standard measurements with which the piano should function: Hammer-to-string distance 45-46mm. Escapement point 1-2-3mm from the string (depending on whether the practice pedal is engaged). Let-off approximately 12-15mm. White key dip 10-10.5 mm; black keys such that, when the hammer regulates are adjusted, they result in being aligned.