Regulating Woes

[Roger Jolly]

Hi Terry,
             Nomally these models have 1 7/8" blow distance. Two thoughts
come to mind, if the key bed has been re located a little forward, it could
give this kind of problem. You may not twig to the problem unless all the
case parts are put together.
The second thing to look at is the position of the capstans, if they are
the long type with extended wires, just push them back a little, (1 to
2mm). This will increase the touch weight a little. Remember that these
instruments were designed with 57gms plus down weight.
If You only have about 50gms DW, that will give you a good clue to the
capstan position being in correct.
Did you have to remove the nose bolts to get the keybed out? If so a change
in action position could cause the problem.
Regards Roger




At 11:05 PM 16/07/99 -0500, you wrote:
>Hi List,
>
>I am having some difficulty regulating a 1919 Doherty 56" upright. I have
>done considerable work on this piano including soundboard repair,
>restringing including new bass strings, new hammers, etc. I have set sample
>hammer blow at 1 3/4", letoff at 1/8" and hammer checking at 5/8". I am
>getting insufficient escapement with those dimensions. I started with 7/16"
>(11 mm) key dip and that isn't sufficient. I get only about 1/32"
>escapement. I tried setting the blow at 1 5/8" but there was no appreciable
>improvement. Increasing the dip to 12 mm will give me about 1/16"
>escapement, but that dip feels too deep for my liking. Increasing letoff to
>3/16 seems to me to be the only solution but I feel that this is too great a
>distance.
>
>Does anyone have any suggestions?
>
>Thanks in advance
>
>Terry Beckingham
>Associate Member 
>The Pas, Manitoba. 
>Canada
> 
Roger Jolly
Baldwin Yamaha Piano Centre
Saskatoon and Regina
Saskatchewan, Canada.
306-665-0213
Fax 652-0505