Could not send message to USER: jennfee Reason for Mail Failure below: ******************************************************** Message not Delivered. Recipient's Mailbox Over Quota. ******************************************************** Terry Beckingham 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? Just kinda thinking out loud here... 1. Are the new hammers bored in the EXACT place as the old? (e.g. distance from the strike point to the hole). Although the rest rail could be adjusted for proper blow distance a slight change in butt angle via the shank as dictated by the bore hole could possibly make a difference. 2. Not trying to be obvious here, but lost motion is okay, right? 3. Did you by chance replace the butts when you did the hammers? You didn't mention that you had but if so check for any geometry variations that could align things differently. Good Luck! Rob Goodale, RPT
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