6) Mark point a1 on the wall A, in the middle of the forward vertical
beam.
7) Mark point b1 on the wall B, in the middle of the side vertical
beam.
8) Mark on the table the plumb dot position as x. (see figure # 10).
תמונ
9) Rotate the laser clockwise so that the forward laser beam
passes through mark b1 on the wall B. Verify that the
plumb dot is on the mark x.
22
A
a1 X
Figure # 10
Figure # 10
B
X
X
b1