Sorry for the delayed reply. The power supply croaked on my PC over the weekend and I just got it back on line late last night.
The post that Tedd referred to was from the Spinetalkers forum. Here is a copy of that post:
>Corey,
>How about sharing hwo you measure "residual bend" with us? And why do
>you not do the same with graphite?
I have added a jig to my flex board (get some use out of the thing!) that rests the shaft on 36" centers. I have mounted a dial indicator in the center so that I can measure bend in thousandths of an inch. This is admittedly getting anal, but I have been periodically attempting to document steel shafts for the relationship of the measured spine to residual bend, out of round, etc.
My initial setup was a piece if 1 X 6 with two upright pieces nailed to the ends and notched to hold a shaft. Took about 15 minutes to build and works fine for observing residual bend. You can stand a ruler on it's end near the high point of the bend and observe the amount as you rotate the shaft
with one hand. You'd be surprised to at what can be observed in this manner. You will discover twists and all manner of irregularities.
Why haven't I documented graphite shafts yet?
"So many shafts, so little time" is the short answer.
:-)
CB
Note:
Although "out-of-round" is mentioned, it is measured with a micrometer, not as part of measuring residual bend in the home-made jig.
CB
At 11:23 AM 3/18/2003 -0500, you wrote:
Greg,
The device Corey designed finds the residual bend in steel shafts (and
possibly graphite), but I don't believe it will measure the roundness of the
shaft (i.e. cross sectional variability of the shaft tube itself, if that's
what you want).
Tedd
-----Original Message-----
From: Greg Zachmann [mailto:[EMAIL PROTECTED]]
Sent: Monday, March 17, 2003 2:37 PM
To: [EMAIL PROTECTED] msen. com
Subject: ShopTalk: Straightness finder
Mr. Corey B are you out there. Tedd Childers mentioned your "straightness
finder" and also made mention of your notes. Could you repost your notes on
making this device. It would certainly come in handy to quote the out of
roundness to a supplier when I wanted to return a defective shaft.
Thanks,
GregZ
