Spine Tester, 21st Century Design

[Cupcake]

I designed my first spine tester about ten years ago and have continually worked to improve my designs.  I have finally finished a design I have been developing for almost two years.

The Spine-O-Matic weighs the shaft, then spines it, and finishes by printing the results on the end of the shaft.  The entire process takes about 6 seconds.  There is a foot operated switch to free your hands for handling shafts.

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Here is a link to a video:
 

[La flecha]

Impressive!  Can I afford it?

That looks very slick! Does it read in # or inches of deflection? 26" or 28" spacing?

Edit: Just watched the video. That is slicker than owl ....!

Bisch

[mboustany]

That is really cool!  Well done.

[Deno]

Great video. Printing on the arrow is a really nice plus.   Availability? or one of a kind soon to be marketed?

Deno

[Cupcake]

It is 26 inch spacing and the final applied force is 2 pounds.  The LCD display has both pounds spine and deflection in inches.

It can also be set to display the measurement in the ASTM system used for aluminum and carbon shafts.  It is a simple algebra conversion when using 26" and 2 pounds.

[CraigC]

That's nice!

[kennym]

Nice job Kevin, that is the Cadillac of testers!!      

[dnovo]

On my spine tester I rotate the shaft to find optimal spine relating to grain of the wood. Do you have any way of doing that ?

[Matty]

That's awesome! Great job. And DNOVO has a great question...thanks for sharing

[Matty]

Love it. Just watched the video. The print feature is slick too.    

[The Whittler]

If you have to ask how much then you might not be able to afford it. :-)

[Walt Francis]

Really slick.

Is Oak Creek a sponsor?

[Cupcake]

dnovo,

Rotating the shaft automatically and testing at several orientations is one of the next things I will be working on.  If you notice, the printing is oriented to the plane on which the spine is measured.  So, if I can make several readings then rotate back to the stiffest orientation then the printing will indicate the that orientation.

[tecum-tha]

Nice setup for a wood shaft manufacturer/professional wood arrowsmith.
Otherwise too much fuss imho.
I like the measuring method though.
I don't think you will have any gain using that for the home arrowbuilder in comparison to dial indicator and writing with a pencil. Heck, the ink cartridge would be dried up everytime I would use it.

[Cupcake]

tecum-tha, yes, it is not at all practical for the home arrow builder.  I designed it mainly just to do it.  I have had the same HP ink cartridge sitting around for almost two years and it is not dried up, the way they are designed I don't think the ink can dry out.

[goobersan]

 
VERY cool. Nice Job !!

[Hud]

Can you set the arrow on with the grain vertical, or does it rotate the shaft to a high or low point?
I like the printing, speed and convenience, being able to work with carbon or aluminum is a good idea like your previous model.

[Orion]

Looks interesting.  Unfortunately, the link doesn't work for me.

[Burnsie]

That is cool.
Wish I was that smart.