Post alignment

This is the right technique. Of course, small taps! It is fundamental that the lever is centered; mark the roller in the center. Furthermore, its centering achieves perpendicularity with respect to the roller itself and smooth full sliding during the escapement (naturally well-graphited)

In my pf many uprights don't align exactly with the rollers... argggh!

Correct them. Then, with a small brass brush, gently clean the felt of the rollers. Then use 500 grit sandpaper, preferably 600, in the direction of the felt. If you have Teflon powder, apply it with a finger or a small brush onto the rollers (absolutely no talcum powder). Check again the centering of the jacks and the centering of the repetitions. General regulation of the action.

But which way does the drumhead go??

Forgive my immense ignorance!!

Regards

Saverio

which makes the escape wheel tooth slide better during the escapement phase.

THANK YOU PAOLO!

Maestro Ferrarelli, I would have a question specifically on this subject: besides the escapement hammer, must the repetition lever also be perfectly centered to the roller? (on my piano, all the rollers tend to lean to the left)

Naturally everything is centered! To center the trestles, you need to place shims to the right or left of their forcola (bridge)

Thanks! In fact, I have taken care of it and the increase in yield is evident!