Anyone use the "Arrow Analyzer" from 3 Rivers?

[Tedd]

Anyone use the "Arrow Analyzer" from 3 Rivers? It looks really handy, if it works as good as advertised.
Tedd

[monk]

I think so.

You are talking about the Bearpaw spine tester, correct? I have not seen one in person yet, but have seen a video of it in use, and it looks like a slick machine.

Bisch

[luv2bowhunt]

If it's the one Bisch mentioned... I saw it at the Kalamazoo Traditional Expo, very cool piece of equipment! I like technology and this thing is friggin' sweet  :D

[lt-m-grow]

Wow.  Just watched the video.  That is quite the machine.  

 

Not for me, but that is something.

[Captain*Kirk]

Originally posted by Tedd:
Anyone use the "Arrow Analyzer" from 3 Rivers? It looks really handy, if it works as good as advertised.
Tedd

I'm impressed! But can't justify the price for the dozen or so woodies I make a year.

[tecum-tha]

One of the most useless "inventions" out there.
Who wants to combine a spinetester and a scale for 6 times the price it costs to build a super accurate spine tester and a good digital scale?
This tester works essentially reverse from what a spine tester should do. Instead of hanging a defined weight on a shaft on  26" apart supports and measure the deflection, this device will measure the weight required until it reaches a specific deflection. Ideally with 2 digital scales on each support and then calculating the ratio of this weight to 2# and leaving the deflection @2# as the variable to be calculated.
Before you depress the shaft, you will get the shaft weight by summing up the two support readings.
Requirements: 100% linear elastic behavior of shaft material. Shear deformation is neglected.
Scale depression way is most likely neglected.

Tip: Buy a decent reloading digital scale that can be used for many more tasks, build highly accurate conventional spine tester with adjusted scales from around $20 -30 in raw materials.

Even for high volume spining of shafts, it is easier to first sort into spine batches and then from these batches into weight groups. By separation of the spine and weight devices it can also be done by 2 different workers. That cuts down on fatigue and boredom of the task at hand.