> Hmmm... I think we'll have to be a bit more specific then that. A 10 gram > strike weight in the top low strike weight zone equates to something > around hammer number 5. A weight of 5 at key 88 is perhaps a quarter zone > higher... that means you have really low hammer weight if this is > reflective. ***** I will probably push the hammers up to number 6. As I said, I have not done any corrective hammer leading yet. Front weights... assuming we are balancing the > same notes you mentioned for hammer weights then you have an action ratio > of 6.2 in the bass ranging to 7.8 in the treble. Kind of wild... but > suffice to say you have a high action ratio... which fits at least your KR > and Knuckle configuration. Without more specifics this is just ball park. > I'd ask for at least 7-8 samples of SW, FW, BW, and KR along with your WW > to get a more accurate picture of your situation... say all C's but I > think its safe to say you have a pretty high action ratio....no matter > which way you look at it. ******My samples were not all C's but they are all naturals, first and last in each section. - here it is: note# SW FW BW KR WW 1 10 30.1 41.5 .55 16.4 25 10 26.7 42.5 .52 16.4 27 9.3 23.8 39.5 .54 16.4 45 8.4 15.5 44 .54 16.4 47 8.7 16.6 42.5 .53 16.4 66 6.8 7.7 42.5 .54 16.4 68 6.5 6.5 41.5 .54 16.4 88 5.0 6.8 36.5 .53 16.4 Note that the WW value is the same because it is the average - the range was from 15.9 to 17.2 > > Why you end up with such a short blow distance and deep key dip to get any > aftertouch is a good question if the above is close to the truth of the > matter. A short bore length would force you to raise the shank closer to > the strings... ie raise the underlever (whippen) which should not require > a deep key dip to get aftertouch. A long one would keep your shank just > off the rest cushion at a shorter blow distance... and perhaps fit the > condition of a high action ratio thats heavy, has keep key dip and short > blow with minimum aftertouch. But if you are certain about bore length > being at String height - hammer shank center height then something is not > quite right with this whole picture.... grin.. or its just so late over > here that I've got things backasswards again.... wouldnt be the first > time. :) ****I am absolutely certain that the bore distances are based on String height - hammer shank center height. > > As far as minimum 44 mm. I think thats about as short a blow as you can > allow for without sacrificing too much power. Usually you find somewhere > between 45 and 49... sometimes 44... sometimes 50.... rarely outside that > because of what implications it has for the rest of action regulation > specs. We have this ideal of about 10 mm key dip, and about 1.5 to 2.5 mm > letoff... which more or less dictates blow for any given amount of > aftertouch. It all adds up usually to somewhere between 44 and 50 for > blow. **** I measured the height of the sharp blocks to get an idea of maximum key dip. Not that I like that much necessarily. Gene > > Cheers > RicB > > >> >/ What are your Hammer Strike weights >> /*****10 in the bass and 5 in the treble - no corrective weighting action >> taken yet. >> >> and key Front Weights ? >> ***** >> 30 in the bass and 6.8 in the treble >> >> Your dip >> >/ and blow say low ratio but your KR and knuckle distance says high. How >> />/ much aftertouch are you getting with things as they are... >> /***** about 1.5mm or slightly less. >> >> how far out >> >/ from under the knuckle does the jack move ? >> /*****Just enough for drop and aftertouch to happen. >> >/ >> />/ 41 mm is on the short end of the stick to be sure. I usually dont >> see />/ under 44 and never allow for less when redoing an action. >> /***** Do you have a reason for maintaining 44mm or greater blow >> distance? >> >> Regards, >> Gene >> >/ >> />/ Cheers >> />/ RicB >> />/ >> />/ >> />/ Hello list, >> />/ Thought that I would seek comments on an action with high >> leverage. >> />/ Key dip is 10.5mm and blow distance is 41mm. >> />/ The touchweights are in the low 50's down and low 30's up. >> />/ Knuckle spread 16.5mm >> />/ Key ratio is 1.81 >> />/ Action spread is 113mm and is adjustable. >> />/ Any more dip will make the sharps about level with the naturals >> when >> />/ depressed. The feel of the samples are acceptable. Seems that 41mm >> />/ blow distance is short - but is it too short? Maybe some loss of >> />/ power? Is there a down side to this action? Any corrective >> />/ suggestions? It is in the sampling - disassembled stage. >> />/ Thanks, >> />/ Gene >> />/ >> />/ >> />/ / >
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