order of regulation

Thank you all for your precious answers.

It seems to me that the regulation and pre-regulation are quite alright... the piano had its keyboard bushings changed (only those of the central key pivot), the depth and leveling were redone, and the jack and hammer pins were changed.

i am not convinced by the result... it seems to me that this different aftertouch space is not a good thing...

good day

m

How were the first and second escapements set?

Have you read the Kawai regulation manual? Were the measurements respected? I had a Kg2 and I know that type of action very well; it seems strange to me that if the regulation was done according to the rules, there would be this inconsistency from key to key. Do you feel this sensation even without the dampers (with the right pedal pressed down)?

I also tried with the right pedal pressed, but the result is the same. The escapement is adjusted according to standard practice (it was done by the technician), but perhaps the "second" escapement (the hammer drop measurement) should be rechecked.

Regarding the measurements: it must be noted that the instrument (which is about 30 years old) has undergone various modifications (not always successful) by different technicians: replacement of the hammer rail, hammer heads, hammer felt, shaving, weighting, regulation of hammer dip, etc.).

Currently, the measurements reflect those in the manual, except for the black keys, which are 12mm compared to the 12.5mm indicated by the manufacturer.

I understand.... the white and black keys support that have not been modified in the coverings, so... but are the hammers aligned in the falling position? Regardless of the measurements, if it is true that everything was done correctly and if the hammers are aligned in all positions (rest, first, and second), you shouldn't feel any differences (provided that the pusher is positioned correctly)

Place a long line on the rests, near the hammers and check if the perfect alignment of the rests corresponds to the perfect alignment of the heads....not to be distrustful, but still...

in the drop position, do you mean the hammer rest engagement? in this case yes, they are aligned, while I am not sure about the alignment in the other positions... this seems less obvious to me....

No, I meant at rest and on the second escapement.... Instead, the line test was needed to see if there was any alignment problem with the hammer drillings....

Hello everyone. A question regarding the order of regulation:

When having to redo the keyboard depth (after having first leveled it perfectly), is it necessary to first adjust the hammer-string distance across the entire action?

thanks everyone

best regards

m.

yes, that's fine.

Good morning everyone. I would like to ask you if, in your opinion, reducing the hammer-string distance (after the hammer rebound) could lead to benefits or disadvantages. Some time ago, before a concert, the technician adjusted this point and the immediate sensation was decidedly better. Thank you

A video tutorial of mine on custom adjustments will be released. It is currently in the editing phase. In any case, every adjustment affects the feel and not just that. There must nonetheless be an appreciable difference between the hammer fall and its check.

Very well! I look forward to your video, which will surely be very interesting. Regarding the distance between the hammer fall and its escapement, I was thinking of bringing it closer to 10/12 mm (compared to the 15 mm of the manufacturer) but I am not certain. Thank you, see you soon

Between 12 and 15 there isn't much difference. Naturally, the higher parade facilitates the escapement lever, but the spring must be lightened. In short, we are moving into customizations.

Good morning everyone. In the pre-regulation phase, I believe I have understood that the repetition lever must be slightly higher than the pusher (about 0.1-0.2 mm). A nearly imperceptible measurement, which is difficult for me to recognize by sight. I would like to ask if there is a specific tool to adjust this micro-distance and/or a safer technique, or if this adjustment is based on the technician's experience. Furthermore, when the roller is slightly flattened (but not enough to require replacement), shouldn't both the lever and the escapement upright be aligned?

i hope I have used the correct terms.

Thank you all

have a good day.

m

Hello

As far as I know, there is no specific tool to adjust the height of the repetition lever relative to the top of the upright.

As Pianoexpert says in the video on grand piano pf regulation, one should have a feeling of "non-leveling," like a small notch/tooth.

My previous post is not correct.

Of course, there is a specific tool to act on the repetition lever screw.

The tool that I believe does not exist and to which I was referring is the one for measuring that small tooth between the top of the upright and the lever.

Of course, yes. Let's say that this pre-regulation, to be precise, deals with the spring tension and the flattening of the roller. One should not feel the click of the escapement lever repositioning under the roller beneath the finger. Therefore, there must be a slight resistance of the escapement lever when repositioning, but not an impediment. The Americans recommend that, in the resting position, one should "roll" the levers and feel a slight resistance, while still achieving perfect repositioning. A slight lowering and raising of the hammer is also felt. This last check is called by them "rocking the fly"