3
Advantages
Two perpendiculary lasers
Possibility of lay out big sundials highly positioned
Not necessary to know the declination of the wall
6
Billsticking of the declination Solstices and equinoxes positioned with
3 holes: an axis with symbol
For any declination of the sun:the disc can be blocked with a small plastic stopper which is pusched with a screw (with a sun decoration)
7
Horizontality adjustment An aluminium tray with 15,75" on each side 3 screws for adjustment
Double precise spirit level
8
Alignment on the local meridian
A compass for a first rough alignment
A viewfinder with a lens and a target
9
Drawing the hour lines
Adjust the position of the lower disc on the value of the hour angle (15° for 13h…)
Pivot the upper disc from the top to the bottom
10
Drawing the diurn curves
Adjust the value of the sun declination value of the hour angle
You just have to pivot the upper part from left to right
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