Primitive Archer

Main Discussion Area => Arrows => Topic started by: lenador on October 31, 2014, 08:35:19 am

Title: Made my own spine tester.
Post by: lenador on October 31, 2014, 08:35:19 am
Made it from pieces of scrap would that would of just been firewood. I took a really simple approach to it. Essential I eliminated the whole need and gauge for a simple broken piece of tape measure and I measure off the weight itself. The weight was made of scrap metal.
 I tested some carbon arrows on it and my tester was only off by 1/200th of an inch so its very very close. The 400 arrow on my scale read 405.
(http://i32.photobucket.com/albums/d31/PORTnPOLISH97/Mobile%20Uploads/IMG_20141029_180613594.jpg) (http://s32.photobucket.com/user/PORTnPOLISH97/media/Mobile%20Uploads/IMG_20141029_180613594.jpg.html)
Title: Re: Made my own spine tester.
Post by: Knoll on October 31, 2014, 06:51:20 pm
Lookin' good.  Possible to show us how you're doing the measurement?
Title: Re: Made my own spine tester.
Post by: lenador on October 31, 2014, 07:18:58 pm
Yeah I'll get a picture later. I haven't comlletlwy finished that part yet.
Title: Re: Made my own spine tester.
Post by: 1442 on November 02, 2014, 11:07:51 pm
that ought to work. good way to make a quick easy way to read the deflection measurement
Title: Re: Made my own spine tester.
Post by: Grasshopper Mouse on November 04, 2014, 03:03:07 pm
You mentioned using carbon arrows to check this tester you made. Keep in mind that carbon shafts are tested on supports 28" apart using a 1.94lb weight.
Wood shafts are tested on supports 26" apart using a 2lb weight.
Testing a carbon shaft on a wood setup could give you some wonky readings.
Don't ask me why there are two different testing standards.

Guy
Title: Re: Made my own spine tester.
Post by: lenador on November 04, 2014, 08:39:58 pm
Him I didn't realize that maybe that is why mine was 1/200th over.
 Really since I plan to make my own shafts I'm moteninerested in the number I get on my scale so I can shoot consistent arrows.
Title: Re: Made my own spine tester.
Post by: Grasshopper Mouse on November 04, 2014, 10:00:16 pm
If you use the tester as a point of reference then it will work great.

Guy