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| From: bodymanbowyer
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| Date: 24-Mar-17 |
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Small V8 can is what I poured my lead into. JF
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| From: zonic
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| Date: 24-Mar-17 |
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Looks like she'd be mighty accurate.
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| From: StikBow
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| Date: 24-Mar-17 |
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And I thought you had a bad wing, too. Great project-and get healed up.
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| From: bodymanbowyer
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| Date: 24-Mar-17 |
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Only left hand arrows with a right helical ;-) JF
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| From: bodymanbowyer
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| Date: 24-Mar-17 |
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Jk asked for pictures, he lost his. JF
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| From: 2 bears
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| Date: 24-Mar-17 |
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What do you do about the tension of the indicator pushing the shaft up off the supports? I forget the reason why but I made mine with the weight pushing down like that.I got frustrated with the tension of the indicator pushing the shaft off the supports,and the shafts falling off. I cut most of the top off and made a hanging weight with the indicator up top. How do you work with that? I liked it other wise. It was easier to build with the hanging weight and the indicator keeps the shaft in position. It seems to be faster to use. I know there must have been some reason for building it like you did though. I just don't remember why. >>>------> Ken
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| From: bodymanbowyer
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| Date: 24-Mar-17 |
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Ken I weighed the tension it took to move the indicator and added a 1 1/2- 1/4 oz. This was to compensate for the the spring pressure. I used my small grain/ ounce scale. JF
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| From: bodymanbowyer
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| Date: 24-Mar-17 |
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I also zeroed it out, coming up to the bottom of a carbon shaft. JF
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| From: 2 bears
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| Date: 24-Mar-17 |
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I weighed the tension at mid travel, on the indicator and subtracted that amount of bird shot from the hanging container. It seems to be very accurate and was much easier,at least for me,to construct.Except for doing it twice. A couple of years ago I was dead set on going against the trend and wanted the weight on top. I can't for the life of me remember why. If it ever comes to me I might even change it back. LOL I just like to build stuff. If you set the indicator where it just touches the shaft that helps. Different size shafts or a slight bow in one kept me adjusting the indicator. I was hoping you had a secret.Nice to share ideas. Thanks for you replies. >>>----->Ken
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| From: bodymanbowyer
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| Date: 24-Mar-17 |
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Ken, was able to find a small oring to space it he indicator down also to zero it to zero. JF
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| From: mgerard
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| Date: 24-Mar-17 |
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Looks good Jeff. Did you do all that with one hand? :>)
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| From: 2 bears
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| Date: 24-Mar-17 |
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Neat idea. You are going to force me to rebuild yet. LOL >>>-----> Ken
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| From: bodymanbowyer
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| Date: 24-Mar-17 |
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One good arm and hand and Left fingers. It took me awhile. I had to figure out how to hold stuff in place. Lots of clamps :-) JF
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| From: Bowlim
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| Date: 24-Mar-17 |
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Someone mentioned Hera's bow builds the other day, and while tracking those down, I can me across the following Spine Tester:
http://leatherwall.bowsite.com/TF/lw/thread2.cfm?threadid=180899&category=88#2418328
Has to be the easiest to build I have ever seen. That because of the way he sidestepped the need for a complicated bearing at the pivot. Only thing missing is a means of quickly zeroing the arrow, but that is easily added if one wants it.
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| From: Mpdh
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| Date: 24-Mar-17 |
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BMB, do you have some type of bearing inside the eyebolts?
MP
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| From: bodymanbowyer
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| Date: 24-Mar-17 |
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MP yes I have a collet that squeezed into the eye bolt and then I polish the inside of the college and the shaft. And lubricate with powdered graphite . JF
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| From: jk
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| Date: 24-Mar-17 |
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several perfect pics better than a thousand words...
My spine tester was accurate enough for jazz, but not enough for my present aspirations (fancy talk).
Thanks Jeff...
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| From: jk
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| Date: 24-Mar-17 |
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...and important: Thanks and take care of yourself !
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| From: bodymanbowyer
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| Date: 24-Mar-17 |
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It's not a new design. My first at putting one together and using it :) JF
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| From: mgerard
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| Date: 24-Mar-17 |
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How did those ash shafts spine out Jeff? What shaft did you use to check the accuracy?
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| From: Fats
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| Date: 24-Mar-17 |
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Looks good Jeff looks alot like my how's work
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| From: fdp
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| Date: 24-Mar-17 |
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That's a very neat spine tester indeed. But keep in mind that when you are shooting wooden arrows, and especially if building them from scratch, or even to some degree from purchased shafting, all you need is a way to measure deflection consistently.
For instance, you are making wooden arrows from stock, all need to do is start shooting and sanding the shaft. When it shoots on the money vertically, then put the shaft on 2 supports, whatever distance apart (mine are 26" apart) measure the deflection b hanging a weight on it, and mark it on something on the background behind the arrow. Then, just simply duplicate the defelction with all the others you make.
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| From: bodymanbowyer
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| Date: 24-Mar-17 |
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I had some other bundles of shafts. My deflection is falling into what the shafts are supposed to be. I have a few others there were checked on another spine tester, my comes up the same :) JF
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| From: bodymanbowyer
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| Date: 24-Mar-17 |
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Oh yeah? Mike, my ash shafts. I finally won. Lot of heating, compression and bending. Two were horrible. 10 are holding and in the process of staining and sealing then cresting. All in due time. JF
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| From: bodymanbowyer
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| Date: 25-Mar-17 |
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I'll be checking the spine on these pain in the Ash shafts later today?. JF
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