Now do these have to be exactly perpendicular directions involving perhaps the drawing of a cross on a board so you can orientate the disto exactly Or are they just saying that for these 4 directions, you have to pick an exact point on which to train the lazer, so that each of the 4 rotatory shots is to exactly the same point.

Surely 4 garden stakes in the ground at the right place would do the job too... with cross pieces tied on?

right - OK - cheers for that foot leg. so given that distance is irrelavent. Could you not do the same in a card board box (with no staples in it!!) imagine your 1 2 3 4 where written in the bottom corners of the box. Then you can just rest the disto on the base of the box. (just thought though - you'll not be able to press the button when the key pad is face down). Hmm.looks like Im off to find some trees tonight then

I'm absolutely sure that only 3 are just enough. m.

Quote from: sluka on June 09, 2009, 01:46:28 pmI'm absolutely sure that only 3 are just enough. I also heard that suggested somewhere, but I cannot work out how you get all the angles you need to represent the 6 faces, and 8 corners of a cube with just 3. Can anyone explain?

I'm absolutely sure that only 3 are just enough.

But then you need to take the 8 sets of readings to the corners of the cube. You can measure one set of these 45 degree angles from B to C, and another from C to B. But how do you get the others? Or are these not really required to get a good calibration?

Quote from: footleg on June 09, 2009, 02:19:25 pmBut then you need to take the 8 sets of readings to the corners of the cube. You can measure one set of these 45 degree angles from B to C, and another from C to B. But how do you get the others? Or are these not really required to get a good calibration?From A to B and from B to A.

thats what I read it to mean - but thats not how it reads on the DistoX destructions.

but we are still saying that the first 4 horizontal directions do have to be precise. This is the bit I cant get my head round - do they have to be 'precisely' perpendicular. or just roughly perpendicular. Why has the word 'precise' been used.

that is sufficiently orthogonal