From: neuse
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Date: 21-Jan-18 |
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I would like to build this spine tester.
I do not understand how to build the pivot point for the weight/arrow intersection.
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From: neuse
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Date: 21-Jan-18 |
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I tried to embed a photo from my PC, somehow that did not work.
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From: StikBow
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Date: 21-Jan-18 |
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Got to see what you want or at least a verbal description or a reference
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From: GF
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Date: 21-Jan-18 |
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This one?
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From: neuse
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Date: 21-Jan-18 |
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From: neuse
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Date: 21-Jan-18 |
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Got it.
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From: Skeets
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Date: 21-Jan-18 |
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The weight just hangs on the arrow. It would not be an intersection.
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From: Catsailor
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Date: 21-Jan-18 |
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I think I understand the question. The weight hangs on the arrow of course, but it also has to deflect the pointer to indicate the amount of deflection on the scale. It will make a difference of where the deflection is applied on the component that indicates deflection. I can not determine how that all comes together in the photo.
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From: StikBow
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Date: 21-Jan-18 |
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There is a circular device that pivots in the circle. It has a wire at 90 degrees on the drawn line that the shafts rest upon. There is a wire that is parallel to the shaft that actually is the indicator on the scale. Or so it seems
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From: neuse
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Date: 22-Jan-18 |
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I think I understand that, there is a wire attached to the indicator, it then has a 90 degree bend and juts out to where the arrow would rest?
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From: reddogge
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Date: 22-Jan-18 |
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You need to google "2Jays spine tester" and it will tell you how to make the wire indicator. You need to play around with the size of that scale. I think I remember I increased it 135% to get it to work.
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From: JusPassin
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Date: 22-Jan-18 |
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I don't see it from these pictures but to do it properly you need a way to "zero" the indicator for each shaft diameter.
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From: Catsailor
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Date: 22-Jan-18 |
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If you are not particular on the type of spine tester you build check out the designs that use a dial gauge. I built one from plans I found in a hunting magazine years ago. It worked out well.
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From: Shooter
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Date: 22-Jan-18 |
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The dial gauge can also check the shaft for straightness
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From: Carolinabob
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Date: 22-Jan-18 |
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I used to have one made by "Cupcake", but you buy shafts in lots of 100. Don't see the need
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From: Stringmaker
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Date: 22-Jan-18 |
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I built this one from scrap aluminum. Just had to but the digital dial indicator -
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From: reddogge
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Date: 22-Jan-18 |
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"I don't see it from these pictures but to do it properly you need a way to "zero" the indicator for each shaft diameter. "
On the one I built the scale has a pivot point and is held by up by friction. When you put your arrow on the scale you raise or lower the scale so the pointer points to zero. Once you do it for the diameter of your batch of arrows you usually don't have to zero it each time, just at the beginning of the session.
And you can test straightness too by just rotating the arrow which will cause the pointer to rise and fall, same as a dial.
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From: buckabow
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Date: 24-Jan-18 |
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I have an old adams spine tester and reddogge is right you need to zero the indicator for each shaft diameter.
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From: JusPassin
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Date: 24-Jan-18 |
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What do you do Michael, stack up those belt buckles to get your two pound weight?
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