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Trying to figure out spine tester plans

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Fox:
I like the idea of using a digital caliper I might do that… seems quite simple

Fox:
So Don the measurement is being done from the bottom stick that comes out of the caliper? I didn’t know that took the same measurement as the jaw, so you just put that against the arrow shaft to measure deflection? And then What do you do with the decimal you get?

Buckskinner:
I made a spine tester from the website Don posted.  I added bearings so I could spin the arrow as well.  For the weight I used a 1 1/2 galvanized nipple and cap then filled with shot to make 1.94 lbs then melted the shot and stuck a piece of wire in for the hanger.  Works great.

Don W:

--- Quote from: Fox on April 26, 2022, 01:48:35 pm ---So Don the measurement is being done from the bottom stick that comes out of the caliper? I didn’t know that took the same measurement as the jaw, so you just put that against the arrow shaft to measure deflection? And then What do you do with the decimal you get?

--- End quote ---

The "stick" has the same measurement. I use the chart with the measurements. The chart is in decimal which I need to convert to inches.

I need to update the page. I did eventually buy a digital caliper to use.

Hawkdancer:
There is a chart out there that converts the decimals.  You can take a known weight arrow and put it on your scale and mark the bend, as well.  I normally use the dial caliper!
Hawkdancer

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