Hi Bernie.
Your post has some very strange characters in it?
I occasionally see that, but I don't know what
causes it. Seems to be directly related to some
webmail client. Anyway, enough about form; back to matters of substance.
At 02:48 PM 2/28/2011, Bernie Baymiller wrote:
Isnât it easier to find a spine by manually
FLOing and marking the shaft, then using a CD
with cross-hairs and slightly enlarged center
hole to mark the other 3 points, since you say
the spine is always 90° from the NBP and I
should find FLO at all 4 points? At least,
Iâve found this to generally be true. Since I
have an NF4, I then can slip the shaft into the
V-notch on the center bearing arm to measure the
two planes and get my DD flex measurement to see which is which .
Absolutely correct.
And many who can do FLO have a frequency meter
along with the clamp and tip weight, so they can
use that to see which is which.
Now, once Iâve found the true NBP and spine
locations by manually FLOing the shaft, could I
use my NF2 with a similarly notched center
bearing arm to get reasonably accurate flex
measurement? I realize the measurement is unique
to my NF2, but will it give me a number thatâs
good enough for shaft matching and my own shaft records?
Well, sorta'. If you're willing to accept the errors due to:
* Residual bend.
* Shaft taper.
* Steps in the shaft.
All of these affect the stiffness reading. Even
if you are measuring stiffness against your own
private standard (and, with an NF2, you would
be), these can still introduce errors. That is,
shafts with identical stiffness could give
different readings due to these geometrical conditions.
Cheers!
DaveT
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