RE: ShopTalk: Frequency meters and deflection boards

[Dave Tutelman]

-----Original Message-----
From: Dave Tutelman
Sent: Tuesday, February 04, 2003 2:25 PM
In
particular, I thought Jeff Sheets was full of it in the latest issue of
Clubmaker, where he says that different machines give different
readings.
The things that make the difference are NOT the sensors or the
electronics,
as he implies; these are either right or wrong (as in they will give
stable
readings or they won't). They don't give DIFFERENT stable readings.
Different readings come from the clamp and the tip weight.
....
(2) I've attended a "frequency meter calibration party", where three
clubmakers brought their [different make] meters. We put a shaft in the
clamp and put a weight on the tip, then used the three meters to measure
that shaft without changing the clamping or weighting. The difference?
1cpm! That's just one unit in the minimum resolution of the meter. And
that's ALL the difference you will EVER see due to sensors or
electronics.

At 05:53 PM 2/4/03 -0600, Donald Johnson wrote:

Dave: To add to your data base I have both a Cub Scout and Digiflex same
clap different sensor's and direction of twang both give the same number
for the same plane on shaft.

Thanks for the data, Don. As luck would have it, the three meters at the "party" were a Digiflex (right, Charlie?), a Club Scout, and my homebrew design. So we have more data now, but not more models.

I know how those things work, and anything more than a difference of one in the last digit means it's probably broken. The substantial differences that Jeff Sheets implies do not exist, for the same shaft in the same clamp with the same weight in the same orientation.

Thanks again,
DaveT