Touchweight Thanks

[Farrell]

I have a nice little digital scale I bought online from a laboratory supply house. It is accurate to 0.01 grams, and comes with a calibration weight. I can't remember exactly what I paid for it, but it was about the same as the one offered be Pianotek. I like the fact that it measures to 1/100ths. It makes being accurate to 1/10 gram so much easier.

I found the URL. Here is the info.

 http://and.balances.com/and/hl-100.html

A&D Model: HL-100 w/ cal & AC 
 
M.S.R.P:  $254.00  
PWB Discounted Price, S&H $8 UPS Ground     $171.45
  
Use Paypal & save $10 why the discount?     
Gram (g)  100 g x 0.01 g  
Ounce (oz)  3.5280 oz x 0.0005 oz  
Carat (ct)  500 ct x 0.05 ct 
Linearity  ± 0.03 g  
Repeatability/Std. Dev.  ± 0.02 g  
Stability Time  3 seconds (typically)  
Sensitivity Drift ± 0.015% / °C TYP (5°C - 35°C / 41°F - 86°F)  
Display  8 mm / 0.31 inch, 7 segment liquid crystal display  
Platform Size  70 mm / 2.75 inch diameter  
Scale Dimensions  140(W) x 150(D) x 53(H) mm  
5.5(W) x 5.9(D) x 2.1(H) 
Power  6 AA size batteries (not included) or optional 120V AC adapter  
Optional Accessories  External Calibration mass, 120 VAC adapter 
 
Terry Farrell
  
----- Original Message ----- 
From: "Cy Shuster" <charter1400@charter.net>
To: <pianotech@ptg.org>
Sent: Thursday, May 23, 2002 8:32 PM
Subject: Re: Touchweight Thanks


> Terry,
> 
> What kind of scale* do you find useful for this?
> 
> --Cy Shuster--
> Rochester, MN
> 
> *(for measuring weight, I mean)
> 
> ----- Original Message ----- 
> From: "Farrell" <mfarrel2@tampabay.rr.com>
> To: <pianotech@ptg.org>
> Sent: May 23, 2002 5:32 PM
> Subject: Touchweight Thanks
> 
> 
> > Thank you to all that provided thoughts for my Yamaha G5 touchweight project. I did not change geometry at all, I smoothed out the SW which fell along the curve 1/3 of the way up through the middle range (lightened all of them quite a bit), and I am part way through the key leading. It's amazing how irregular the old leading (FWs) was. Down in the bass, one natural key will need five grams less FW, and the next one will need 10 grams added!
> > 
> > I first leaded keys and set SWs on my ten test notes. After all was said and done, DWs were right between 52 and 46 grams, and up weights were 24 to 29 grams. Feels real good. I'm quite confident my client will be very happy.
> > 
> > I ended up using the SW curve, tapering the BWs from 40 in the bass to 37 in the treble, and then letting my spreadsheet calculate the needed FWs. The FWs are pretty smooth along the naturals, and then again along the sharps, but of course, they are a few grams higher on the sharps because of the small geometry difference. But I suspect that will be hardly noticeable, especially after I regulate the action and raise the sharps up so that they don't disappear between the naturals anymore.
> > 
> > Anyway, thanks again. I would have been scratching my head for weeks and just gave the action to someone else to do without the help of all you fine and generous technicians. Instead I am developing a valuable skill!
> > 
> > Terry Farrell
> > 
> 
>