[Therion] Disto-X Calibration Woes

[Footleg]

I did a similar calibration in a small stand of trees one lunchtime near
where I work. I think the important thing is to ensure you have the back of
the disto held on a fix point, and the laser pointer on a fixed target for
each of the 4 readings per barrel roll of the device. Choose trees with a
spacing of 4-5m to get the most accurate readings. I followed the
instructions and took all 56 readings representing the directions from the
centre to the 6 faces and 8 corners of an imagined cube. It is only the
directions which are important, so you can move the disto to a different
tree to get each set of 4 readings. Assuming your DistoX is not faulty, this
should give a good calibration. I got 0.25 on my second attempt.

Footleg

2009/5/4 Bruce Mutton <bruce.mutton at paradise.net.nz>

>
> BTW, the best way to callibrate DistoX is to find in a forest THREE
> trees 2 m each from the other representing "half of cube".
>
> A->B
> B->A
> B->C
> C->B
>
> C->base of B
> C->2 m height  of B
> B->base of C
> B->2 m height  of C
> B->base of A
> B->2 m height  of A
> A->base of B
> A->2 m height  of B
> up to your upset hand
> down to your feet
>
>
> Martin
> I assume B is the 'right angle' corner of the triangle formed by the trees.
> In this case, if I understand you correctly, you have described directions
> that are much more biased to particular orientations than Beats
> instructions
> (The diagonal plan and sloping directions are omitted).  The instructions
> do
> say the particular orientation is not important, but given the troubles I
> am
> having I would have thought a uniform three dimensional spread described by
> cube faces and vertices would be less risky.
>
> On the other I can see it is easy to implement in the field without any
> special equipment provided one can brace the disto-X against the tree and
> not bump it when the button is pressed.
>
> I'll give it a go.
>
> Bruce
>
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